[INFO] cloning repository https://github.com/Yufei-YAO/rultdb
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Yufei-YAO/rultdb" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYufei-YAO%2Frultdb", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYufei-YAO%2Frultdb'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 33ebf21218eedc9848ea388fab3b3b3a0a704506
[INFO] testing Yufei-YAO/rultdb against 1.90.0 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYufei-YAO%2Frultdb" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Yufei-YAO/rultdb
[INFO] finished tweaking git repo https://github.com/Yufei-YAO/rultdb
[INFO] tweaked toml for git repo https://github.com/Yufei-YAO/rultdb written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Yufei-YAO/rultdb on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Yufei-YAO/rultdb already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e2fa5ed154e37ac77593c5c3f693e537e83319ac3277a02615ea47104298cb34
[INFO] running `Command { std: "docker" "start" "-a" "e2fa5ed154e37ac77593c5c3f693e537e83319ac3277a02615ea47104298cb34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e2fa5ed154e37ac77593c5c3f693e537e83319ac3277a02615ea47104298cb34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2fa5ed154e37ac77593c5c3f693e537e83319ac3277a02615ea47104298cb34", kill_on_drop: false }`
[INFO] [stdout] e2fa5ed154e37ac77593c5c3f693e537e83319ac3277a02615ea47104298cb34
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 26611aa11cdeaa9755fc389662d1311b00d94c1664b8dd0c25579989badd865b
[INFO] running `Command { std: "docker" "start" "-a" "26611aa11cdeaa9755fc389662d1311b00d94c1664b8dd0c25579989badd865b", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.72
[INFO] [stderr]    Compiling memmap v0.7.0
[INFO] [stderr]    Compiling page_size v0.6.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.63
[INFO] [stderr]    Compiling thiserror v1.0.63
[INFO] [stderr]    Compiling rultdb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ops::Deref`
[INFO] [stdout]  --> src/error.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{io, ops::Deref};
[INFO] [stdout]   |               ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `RefMut`, `io::WriterPanicked`, and `marker::PhantomData`
[INFO] [stdout]  --> src/tx.rs:1:43
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, cell::{RefCell, RefMut}, collections::HashMap, io::WriterPanicked, marker::PhantomData, sync::{Arc, Weak}};
[INFO] [stdout]   |                                           ^^^^^^                         ^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `default`
[INFO] [stdout]  --> src/freelist.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, default, mem::size_of};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `db`
[INFO] [stdout]  --> src/node.rs:3:32
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::{config::PAGE_SIZE, db, page::{BranchPageElement, LeafPageElement, Page, PageFlag, PgId, BRANCH_ELEMENT_SIZE, LEAF_ELEMENT_SIZ...
[INFO] [stdout]   |                                ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> src/cursor.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, sync::Arc};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `WeakTx` and `db`
[INFO] [stdout]  --> src/cursor.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::{ db, node::{Node, WeakNode}, page::{Page, PageFlag, PgId}, tx::{PageNode, Tx, WeakTx}};
[INFO] [stdout]   |              ^^                                                                           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/cursor.rs:238:30
[INFO] [stdout]     |
[INFO] [stdout] 238 |                     Ok(v) => (v),
[INFO] [stdout]     |                              ^ ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 238 -                     Ok(v) => (v),
[INFO] [stdout] 238 +                     Ok(v) => v,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/cursor.rs:239:31
[INFO] [stdout]     |
[INFO] [stdout] 239 |                     Err(e) => (e),
[INFO] [stdout]     |                               ^ ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 239 -                     Err(e) => (e),
[INFO] [stdout] 239 +                     Err(e) => e,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/cursor.rs:250:30
[INFO] [stdout]     |
[INFO] [stdout] 250 |                     Ok(v) => (v),
[INFO] [stdout]     |                              ^ ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 250 -                     Ok(v) => (v),
[INFO] [stdout] 250 +                     Ok(v) => v,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/cursor.rs:251:31
[INFO] [stdout]     |
[INFO] [stdout] 251 |                     Err(e) => (e),
[INFO] [stdout]     |                               ^ ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 251 -                     Err(e) => (e),
[INFO] [stdout] 251 +                     Err(e) => e,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `atomic::AtomicU64` and `default`
[INFO] [stdout]  --> src/db.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::{Borrow, BorrowMut}, default, fs::{File, OpenOptions}, io::Write, ptr::null, sync::{atomic::AtomicU64, Arc, Weak}};
[INFO] [stdout]   |                                        ^^^^^^^                                                        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `TxInner` and `db`
[INFO] [stdout]  --> src/db.rs:5:81
[INFO] [stdout]   |
[INFO] [stdout] 5 | ...PAGE_SIZE}, db, freelist::FreeList, page::{Meta, OwnedPage, Page, PageFlag, PgId, MAGIC, VERSION}, tx::{Tx, TxId, TxInner}};
[INFO] [stdout]   |                ^^                                                                                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bitflags::Flags`
[INFO] [stdout]  --> src/page.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use bitflags::Flags;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Borrow`
[INFO] [stdout]  --> src/node.rs:1:20
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::{Borrow, BorrowMut}, cell::{Ref, RefCell, RefMut}, collections::HashSet, sync::{Arc, Weak}};
[INFO] [stdout]   |                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BorrowMut`
[INFO] [stdout]  --> src/node.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::{Borrow, BorrowMut}, cell::{Ref, RefCell, RefMut}, collections::HashSet, sync::{Arc, Weak}};
[INFO] [stdout]   |                            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bitflags::Flags`
[INFO] [stdout]  --> src/cursor.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use bitflags::Flags;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BorrowMut`
[INFO] [stdout]  --> src/db.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::{Borrow, BorrowMut}, default, fs::{File, OpenOptions}, io::Write, ptr::null, sync::{atomic::AtomicU64, Arc, Weak}};
[INFO] [stdout]   |                            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ow`
[INFO] [stdout]    --> src/tx.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let ow = OwnedPage::from_vec(buf);
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_ow`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]    --> src/tx.rs:197:13
[INFO] [stdout]     |
[INFO] [stdout] 197 |         let item = c.seek(key)?;
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tx.rs:273:13
[INFO] [stdout]     |
[INFO] [stdout] 273 |         let mut root = n.clone();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]    --> src/freelist.rs:141:17
[INFO] [stdout]     |
[INFO] [stdout] 141 |         let mut m: Vec<PgId> = Vec::with_capacity(self.pending_count());
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/freelist.rs:141:13
[INFO] [stdout]     |
[INFO] [stdout] 141 |         let mut m: Vec<PgId> = Vec::with_capacity(self.pending_count());
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/node.rs:257:18
[INFO] [stdout]     |
[INFO] [stdout] 257 |             Some(mut p) => {
[INFO] [stdout]     |                  ----^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]    --> src/node.rs:531:13
[INFO] [stdout]     |
[INFO] [stdout] 531 |         let len = nodes.len();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_id`
[INFO] [stdout]    --> src/node.rs:544:17
[INFO] [stdout]     |
[INFO] [stdout] 544 |             let new_id = page.id;
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/node.rs:499:13
[INFO] [stdout]     |
[INFO] [stdout] 499 |         let mut tx = atx.clone();
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/node.rs:572:21
[INFO] [stdout]     |
[INFO] [stdout] 572 |         if let Some(mut p) = parent_node {
[INFO] [stdout]     |                     ----^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/cursor.rs:127:21
[INFO] [stdout]     |
[INFO] [stdout] 127 |             let mut index: usize = 0;
[INFO] [stdout]     |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/cursor.rs:127:17
[INFO] [stdout]     |
[INFO] [stdout] 127 |             let mut index: usize = 0;
[INFO] [stdout]     |                 ----^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `idx`
[INFO] [stdout]    --> src/cursor.rs:153:13
[INFO] [stdout]     |
[INFO] [stdout] 153 |         let idx = ref_elem.index;
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/cursor.rs:303:13
[INFO] [stdout]     |
[INFO] [stdout] 303 |         let mut elem = self.stack.first().unwrap();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/db.rs:119:13
[INFO] [stdout]     |
[INFO] [stdout] 119 |         let mut tx = Tx::new(true, WeakDB(Arc::downgrade(&self.0)), meta);
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/db.rs:140:13
[INFO] [stdout]     |
[INFO] [stdout] 140 |         let mut meta = self.0.state.try_read().unwrap().borrow().meta();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/db.rs:141:13
[INFO] [stdout]     |
[INFO] [stdout] 141 |         let mut tx = Tx::new(false, WeakDB(Arc::downgrade(&self.0)), meta);
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `opt`
[INFO] [stdout]    --> src/db.rs:164:29
[INFO] [stdout]     |
[INFO] [stdout] 164 |     pub fn open(path: &str, opt: Options) -> Result<DB> {
[INFO] [stdout]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_opt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/tx.rs:22:19
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct WeakTx(pub(crate) Weak<TxInner>);
[INFO] [stdout]    |            ------ ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `release` is never used
[INFO] [stdout]    --> src/freelist.rs:167:19
[INFO] [stdout]     |
[INFO] [stdout]  15 | impl FreeList {
[INFO] [stdout]     | ------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 167 |     pub(crate) fn release(&mut self, txid: TxId) {
[INFO] [stdout]     |                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value` is never used
[INFO] [stdout]   --> src/cursor.rs:44:19
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl<'a> Item<'a> {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 44 |     pub(crate) fn value(&self) -> Option<&'a [u8]> {
[INFO] [stdout]    |                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `begin_rwtx` and `begin_tx` are never used
[INFO] [stdout]    --> src/db.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 112 | impl DB {
[INFO] [stdout]     | ------- methods in this implementation
[INFO] [stdout] 113 |     fn begin_rwtx(&self) -> Tx {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 136 |     fn begin_tx(&self) -> Tx {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `DEFAULT_OPTIONS` is never used
[INFO] [stdout]    --> src/db.rs:293:7
[INFO] [stdout]     |
[INFO] [stdout] 293 | const DEFAULT_OPTIONS: Options = Options {
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/tx.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         self.close();
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let _ = self.close();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/node.rs:69:17
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn node(&self) -> Ref<NodeInner> {
[INFO] [stdout]    |                 ^^^^^     -------------- the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn node(&self) -> Ref<'_, NodeInner> {
[INFO] [stdout]    |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/node.rs:73:28
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub(crate) fn node_mut(&self) -> RefMut<NodeInner> {
[INFO] [stdout]    |                            ^^^^^     ----------------- the same lifetime is hidden here
[INFO] [stdout]    |                            |
[INFO] [stdout]    |                            the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub(crate) fn node_mut(&self) -> RefMut<'_, NodeInner> {
[INFO] [stdout]    |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 172 |         f.set_len(0);
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let _ = f.set_len(0);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.56s
[INFO] running `Command { std: "docker" "inspect" "26611aa11cdeaa9755fc389662d1311b00d94c1664b8dd0c25579989badd865b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26611aa11cdeaa9755fc389662d1311b00d94c1664b8dd0c25579989badd865b", kill_on_drop: false }`
[INFO] [stdout] 26611aa11cdeaa9755fc389662d1311b00d94c1664b8dd0c25579989badd865b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ef38dc3a7b4976d96a3dfdce2eb33d00c3c5ba35330748964cd68067828d7bd
[INFO] running `Command { std: "docker" "start" "-a" "9ef38dc3a7b4976d96a3dfdce2eb33d00c3c5ba35330748964cd68067828d7bd", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `ops::Deref`
[INFO] [stdout]  --> src/error.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{io, ops::Deref};
[INFO] [stdout]   |               ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `RefMut`, `io::WriterPanicked`, and `marker::PhantomData`
[INFO] [stdout]  --> src/tx.rs:1:43
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, cell::{RefCell, RefMut}, collections::HashMap, io::WriterPanicked, marker::PhantomData, sync::{Arc, Weak}};
[INFO] [stdout]   |                                           ^^^^^^                         ^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `default`
[INFO] [stdout]  --> src/freelist.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, default, mem::size_of};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `db`
[INFO] [stdout]  --> src/node.rs:3:32
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::{config::PAGE_SIZE, db, page::{BranchPageElement, LeafPageElement, Page, PageFlag, PgId, BRANCH_ELEMENT_SIZE, LEAF_ELEMENT_SIZ...
[INFO] [stdout]   |                                ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> src/cursor.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, sync::Arc};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `WeakTx` and `db`
[INFO] [stdout]  --> src/cursor.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::{ db, node::{Node, WeakNode}, page::{Page, PageFlag, PgId}, tx::{PageNode, Tx, WeakTx}};
[INFO] [stdout]   |              ^^                                                                           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/cursor.rs:238:30
[INFO] [stdout]     |
[INFO] [stdout] 238 |                     Ok(v) => (v),
[INFO] [stdout]     |                              ^ ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 238 -                     Ok(v) => (v),
[INFO] [stdout] 238 +                     Ok(v) => v,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/cursor.rs:239:31
[INFO] [stdout]     |
[INFO] [stdout] 239 |                     Err(e) => (e),
[INFO] [stdout]     |                               ^ ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 239 -                     Err(e) => (e),
[INFO] [stdout] 239 +                     Err(e) => e,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/cursor.rs:250:30
[INFO] [stdout]     |
[INFO] [stdout] 250 |                     Ok(v) => (v),
[INFO] [stdout]     |                              ^ ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 250 -                     Ok(v) => (v),
[INFO] [stdout] 250 +                     Ok(v) => v,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/cursor.rs:251:31
[INFO] [stdout]     |
[INFO] [stdout] 251 |                     Err(e) => (e),
[INFO] [stdout]     |                               ^ ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 251 -                     Err(e) => (e),
[INFO] [stdout] 251 +                     Err(e) => e,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `atomic::AtomicU64` and `default`
[INFO] [stdout]  --> src/db.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::{Borrow, BorrowMut}, default, fs::{File, OpenOptions}, io::Write, ptr::null, sync::{atomic::AtomicU64, Arc, Weak}};
[INFO] [stdout]   |                                        ^^^^^^^                                                        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `TxInner` and `db`
[INFO] [stdout]  --> src/db.rs:5:81
[INFO] [stdout]   |
[INFO] [stdout] 5 | ...PAGE_SIZE}, db, freelist::FreeList, page::{Meta, OwnedPage, Page, PageFlag, PgId, MAGIC, VERSION}, tx::{Tx, TxId, TxInner}};
[INFO] [stdout]   |                ^^                                                                                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bitflags::Flags`
[INFO] [stdout]  --> src/page.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use bitflags::Flags;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Borrow`
[INFO] [stdout]  --> src/node.rs:1:20
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::{Borrow, BorrowMut}, cell::{Ref, RefCell, RefMut}, collections::HashSet, sync::{Arc, Weak}};
[INFO] [stdout]   |                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BorrowMut`
[INFO] [stdout]  --> src/node.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::{Borrow, BorrowMut}, cell::{Ref, RefCell, RefMut}, collections::HashSet, sync::{Arc, Weak}};
[INFO] [stdout]   |                            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bitflags::Flags`
[INFO] [stdout]  --> src/cursor.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use bitflags::Flags;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BorrowMut`
[INFO] [stdout]  --> src/db.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::{Borrow, BorrowMut}, default, fs::{File, OpenOptions}, io::Write, ptr::null, sync::{atomic::AtomicU64, Arc, Weak}};
[INFO] [stdout]   |                            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ow`
[INFO] [stdout]    --> src/tx.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let ow = OwnedPage::from_vec(buf);
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_ow`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]    --> src/tx.rs:197:13
[INFO] [stdout]     |
[INFO] [stdout] 197 |         let item = c.seek(key)?;
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tx.rs:273:13
[INFO] [stdout]     |
[INFO] [stdout] 273 |         let mut root = n.clone();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]    --> src/freelist.rs:141:17
[INFO] [stdout]     |
[INFO] [stdout] 141 |         let mut m: Vec<PgId> = Vec::with_capacity(self.pending_count());
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/freelist.rs:141:13
[INFO] [stdout]     |
[INFO] [stdout] 141 |         let mut m: Vec<PgId> = Vec::with_capacity(self.pending_count());
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/node.rs:257:18
[INFO] [stdout]     |
[INFO] [stdout] 257 |             Some(mut p) => {
[INFO] [stdout]     |                  ----^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]    --> src/node.rs:531:13
[INFO] [stdout]     |
[INFO] [stdout] 531 |         let len = nodes.len();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_id`
[INFO] [stdout]    --> src/node.rs:544:17
[INFO] [stdout]     |
[INFO] [stdout] 544 |             let new_id = page.id;
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/node.rs:499:13
[INFO] [stdout]     |
[INFO] [stdout] 499 |         let mut tx = atx.clone();
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/node.rs:572:21
[INFO] [stdout]     |
[INFO] [stdout] 572 |         if let Some(mut p) = parent_node {
[INFO] [stdout]     |                     ----^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/cursor.rs:127:21
[INFO] [stdout]     |
[INFO] [stdout] 127 |             let mut index: usize = 0;
[INFO] [stdout]     |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/cursor.rs:127:17
[INFO] [stdout]     |
[INFO] [stdout] 127 |             let mut index: usize = 0;
[INFO] [stdout]     |                 ----^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `idx`
[INFO] [stdout]    --> src/cursor.rs:153:13
[INFO] [stdout]     |
[INFO] [stdout] 153 |         let idx = ref_elem.index;
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/cursor.rs:303:13
[INFO] [stdout]     |
[INFO] [stdout] 303 |         let mut elem = self.stack.first().unwrap();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rultdb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/db.rs:119:13
[INFO] [stdout]     |
[INFO] [stdout] 119 |         let mut tx = Tx::new(true, WeakDB(Arc::downgrade(&self.0)), meta);
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/db.rs:140:13
[INFO] [stdout]     |
[INFO] [stdout] 140 |         let mut meta = self.0.state.try_read().unwrap().borrow().meta();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/db.rs:141:13
[INFO] [stdout]     |
[INFO] [stdout] 141 |         let mut tx = Tx::new(false, WeakDB(Arc::downgrade(&self.0)), meta);
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `opt`
[INFO] [stdout]    --> src/db.rs:164:29
[INFO] [stdout]     |
[INFO] [stdout] 164 |     pub fn open(path: &str, opt: Options) -> Result<DB> {
[INFO] [stdout]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_opt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/tx.rs:22:19
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct WeakTx(pub(crate) Weak<TxInner>);
[INFO] [stdout]    |            ------ ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `release` is never used
[INFO] [stdout]    --> src/freelist.rs:167:19
[INFO] [stdout]     |
[INFO] [stdout]  15 | impl FreeList {
[INFO] [stdout]     | ------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 167 |     pub(crate) fn release(&mut self, txid: TxId) {
[INFO] [stdout]     |                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value` is never used
[INFO] [stdout]   --> src/cursor.rs:44:19
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl<'a> Item<'a> {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 44 |     pub(crate) fn value(&self) -> Option<&'a [u8]> {
[INFO] [stdout]    |                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `begin_rwtx` and `begin_tx` are never used
[INFO] [stdout]    --> src/db.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 112 | impl DB {
[INFO] [stdout]     | ------- methods in this implementation
[INFO] [stdout] 113 |     fn begin_rwtx(&self) -> Tx {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 136 |     fn begin_tx(&self) -> Tx {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `DEFAULT_OPTIONS` is never used
[INFO] [stdout]    --> src/db.rs:293:7
[INFO] [stdout]     |
[INFO] [stdout] 293 | const DEFAULT_OPTIONS: Options = Options {
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/tx.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         self.close();
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let _ = self.close();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/node.rs:69:17
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn node(&self) -> Ref<NodeInner> {
[INFO] [stdout]    |                 ^^^^^     -------------- the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn node(&self) -> Ref<'_, NodeInner> {
[INFO] [stdout]    |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/node.rs:73:28
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub(crate) fn node_mut(&self) -> RefMut<NodeInner> {
[INFO] [stdout]    |                            ^^^^^     ----------------- the same lifetime is hidden here
[INFO] [stdout]    |                            |
[INFO] [stdout]    |                            the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub(crate) fn node_mut(&self) -> RefMut<'_, NodeInner> {
[INFO] [stdout]    |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 172 |         f.set_len(0);
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let _ = f.set_len(0);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ops::Deref`
[INFO] [stdout]  --> src/error.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{io, ops::Deref};
[INFO] [stdout]   |               ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `RefMut`, `io::WriterPanicked`, and `marker::PhantomData`
[INFO] [stdout]  --> src/tx.rs:1:43
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, cell::{RefCell, RefMut}, collections::HashMap, io::WriterPanicked, marker::PhantomData, sync::{Arc, Weak}};
[INFO] [stdout]   |                                           ^^^^^^                         ^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `default`
[INFO] [stdout]  --> src/freelist.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, default, mem::size_of};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `db`
[INFO] [stdout]  --> src/node.rs:3:32
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::{config::PAGE_SIZE, db, page::{BranchPageElement, LeafPageElement, Page, PageFlag, PgId, BRANCH_ELEMENT_SIZE, LEAF_ELEMENT_SIZ...
[INFO] [stdout]   |                                ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ptr::null_mut`
[INFO] [stdout]    --> src/node.rs:590:9
[INFO] [stdout]     |
[INFO] [stdout] 590 |     use std::ptr::null_mut;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::db::DBInnerState`
[INFO] [stdout]    --> src/node.rs:592:9
[INFO] [stdout]     |
[INFO] [stdout] 592 |     use crate::db::DBInnerState;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> src/cursor.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, sync::Arc};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `WeakTx` and `db`
[INFO] [stdout]  --> src/cursor.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::{ db, node::{Node, WeakNode}, page::{Page, PageFlag, PgId}, tx::{PageNode, Tx, WeakTx}};
[INFO] [stdout]   |              ^^                                                                           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/cursor.rs:238:30
[INFO] [stdout]     |
[INFO] [stdout] 238 |                     Ok(v) => (v),
[INFO] [stdout]     |                              ^ ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 238 -                     Ok(v) => (v),
[INFO] [stdout] 238 +                     Ok(v) => v,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/cursor.rs:239:31
[INFO] [stdout]     |
[INFO] [stdout] 239 |                     Err(e) => (e),
[INFO] [stdout]     |                               ^ ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 239 -                     Err(e) => (e),
[INFO] [stdout] 239 +                     Err(e) => e,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/cursor.rs:250:30
[INFO] [stdout]     |
[INFO] [stdout] 250 |                     Ok(v) => (v),
[INFO] [stdout]     |                              ^ ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 250 -                     Ok(v) => (v),
[INFO] [stdout] 250 +                     Ok(v) => v,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/cursor.rs:251:31
[INFO] [stdout]     |
[INFO] [stdout] 251 |                     Err(e) => (e),
[INFO] [stdout]     |                               ^ ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 251 -                     Err(e) => (e),
[INFO] [stdout] 251 +                     Err(e) => e,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `atomic::AtomicU64` and `default`
[INFO] [stdout]  --> src/db.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::{Borrow, BorrowMut}, default, fs::{File, OpenOptions}, io::Write, ptr::null, sync::{atomic::AtomicU64, Arc, Weak}};
[INFO] [stdout]   |                                        ^^^^^^^                                                        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `TxInner` and `db`
[INFO] [stdout]  --> src/db.rs:5:81
[INFO] [stdout]   |
[INFO] [stdout] 5 | ...PAGE_SIZE}, db, freelist::FreeList, page::{Meta, OwnedPage, Page, PageFlag, PgId, MAGIC, VERSION}, tx::{Tx, TxId, TxInner}};
[INFO] [stdout]   |                ^^                                                                                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::time`
[INFO] [stdout]    --> src/db.rs:301:9
[INFO] [stdout]     |
[INFO] [stdout] 301 |     use core::time;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str`
[INFO] [stdout]    --> src/db.rs:302:9
[INFO] [stdout]     |
[INFO] [stdout] 302 |     use std::str;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::sleep`
[INFO] [stdout]    --> src/db.rs:304:9
[INFO] [stdout]     |
[INFO] [stdout] 304 |     use std::thread::sleep;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::JoinHandle`
[INFO] [stdout]    --> src/db.rs:305:9
[INFO] [stdout]     |
[INFO] [stdout] 305 |     use std::thread::JoinHandle;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::Thread`
[INFO] [stdout]    --> src/db.rs:306:9
[INFO] [stdout]     |
[INFO] [stdout] 306 |     use std::thread::Thread;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]    --> src/db.rs:307:9
[INFO] [stdout]     |
[INFO] [stdout] 307 |     use std::time::Duration;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bitflags::Flags`
[INFO] [stdout]  --> src/page.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use bitflags::Flags;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Borrow`
[INFO] [stdout]  --> src/node.rs:1:20
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::{Borrow, BorrowMut}, cell::{Ref, RefCell, RefMut}, collections::HashSet, sync::{Arc, Weak}};
[INFO] [stdout]   |                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BorrowMut`
[INFO] [stdout]  --> src/node.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::{Borrow, BorrowMut}, cell::{Ref, RefCell, RefMut}, collections::HashSet, sync::{Arc, Weak}};
[INFO] [stdout]   |                            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bitflags::Flags`
[INFO] [stdout]  --> src/cursor.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use bitflags::Flags;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BorrowMut`
[INFO] [stdout]  --> src/db.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::{Borrow, BorrowMut}, default, fs::{File, OpenOptions}, io::Write, ptr::null, sync::{atomic::AtomicU64, Arc, Weak}};
[INFO] [stdout]   |                            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ow`
[INFO] [stdout]    --> src/tx.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let ow = OwnedPage::from_vec(buf);
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_ow`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]    --> src/tx.rs:197:13
[INFO] [stdout]     |
[INFO] [stdout] 197 |         let item = c.seek(key)?;
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tx.rs:273:13
[INFO] [stdout]     |
[INFO] [stdout] 273 |         let mut root = n.clone();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]    --> src/freelist.rs:141:17
[INFO] [stdout]     |
[INFO] [stdout] 141 |         let mut m: Vec<PgId> = Vec::with_capacity(self.pending_count());
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/freelist.rs:141:13
[INFO] [stdout]     |
[INFO] [stdout] 141 |         let mut m: Vec<PgId> = Vec::with_capacity(self.pending_count());
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pgid`
[INFO] [stdout]    --> src/freelist.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |         let pgid = freelist.allocate(1);
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_pgid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `freelist`
[INFO] [stdout]    --> src/freelist.rs:219:17
[INFO] [stdout]     |
[INFO] [stdout] 219 |         let mut freelist = FreeList {
[INFO] [stdout]     |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_freelist`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/freelist.rs:219:13
[INFO] [stdout]     |
[INFO] [stdout] 219 |         let mut freelist = FreeList {
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/freelist.rs:238:13
[INFO] [stdout]     |
[INFO] [stdout] 238 |         let mut freelist = FreeList {
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/node.rs:257:18
[INFO] [stdout]     |
[INFO] [stdout] 257 |             Some(mut p) => {
[INFO] [stdout]     |                  ----^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]    --> src/node.rs:531:13
[INFO] [stdout]     |
[INFO] [stdout] 531 |         let len = nodes.len();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_id`
[INFO] [stdout]    --> src/node.rs:544:17
[INFO] [stdout]     |
[INFO] [stdout] 544 |             let new_id = page.id;
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/node.rs:499:13
[INFO] [stdout]     |
[INFO] [stdout] 499 |         let mut tx = atx.clone();
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/node.rs:572:21
[INFO] [stdout]     |
[INFO] [stdout] 572 |         if let Some(mut p) = parent_node {
[INFO] [stdout]     |                     ----^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/node.rs:598:13
[INFO] [stdout]     |
[INFO] [stdout] 598 |         let mut node1 = NodeInner::new().leaf(true).build();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/cursor.rs:127:21
[INFO] [stdout]     |
[INFO] [stdout] 127 |             let mut index: usize = 0;
[INFO] [stdout]     |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/cursor.rs:127:17
[INFO] [stdout]     |
[INFO] [stdout] 127 |             let mut index: usize = 0;
[INFO] [stdout]     |                 ----^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `idx`
[INFO] [stdout]    --> src/cursor.rs:153:13
[INFO] [stdout]     |
[INFO] [stdout] 153 |         let idx = ref_elem.index;
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/cursor.rs:303:13
[INFO] [stdout]     |
[INFO] [stdout] 303 |         let mut elem = self.stack.first().unwrap();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/db.rs:119:13
[INFO] [stdout]     |
[INFO] [stdout] 119 |         let mut tx = Tx::new(true, WeakDB(Arc::downgrade(&self.0)), meta);
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/db.rs:140:13
[INFO] [stdout]     |
[INFO] [stdout] 140 |         let mut meta = self.0.state.try_read().unwrap().borrow().meta();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/db.rs:141:13
[INFO] [stdout]     |
[INFO] [stdout] 141 |         let mut tx = Tx::new(false, WeakDB(Arc::downgrade(&self.0)), meta);
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `opt`
[INFO] [stdout]    --> src/db.rs:164:29
[INFO] [stdout]     |
[INFO] [stdout] 164 |     pub fn open(path: &str, opt: Options) -> Result<DB> {
[INFO] [stdout]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_opt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx`
[INFO] [stdout]    --> src/db.rs:344:17
[INFO] [stdout]     |
[INFO] [stdout] 344 |         let mut tx = unsafe { (&*(db.0.state.try_read().unwrap().meta0)).txid };
[INFO] [stdout]     |                 ^^ help: if this is intentional, prefix it with an underscore: `_tx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/db.rs:344:13
[INFO] [stdout]     |
[INFO] [stdout] 344 |         let mut tx = unsafe { (&*(db.0.state.try_read().unwrap().meta0)).txid };
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/db.rs:360:13
[INFO] [stdout]     |
[INFO] [stdout] 360 |         let mut db = DBInner::open("./test2.db", DEFAULT_OPTIONS).unwrap();
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/db.rs:385:13
[INFO] [stdout]     |
[INFO] [stdout] 385 |         let mut db = DBInner::open("./test2.db", DEFAULT_OPTIONS).unwrap();
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/tx.rs:22:19
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct WeakTx(pub(crate) Weak<TxInner>);
[INFO] [stdout]    |            ------ ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value` is never used
[INFO] [stdout]   --> src/cursor.rs:44:19
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl<'a> Item<'a> {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 44 |     pub(crate) fn value(&self) -> Option<&'a [u8]> {
[INFO] [stdout]    |                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/tx.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         self.close();
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let _ = self.close();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/node.rs:69:17
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn node(&self) -> Ref<NodeInner> {
[INFO] [stdout]    |                 ^^^^^     -------------- the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn node(&self) -> Ref<'_, NodeInner> {
[INFO] [stdout]    |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/node.rs:73:28
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub(crate) fn node_mut(&self) -> RefMut<NodeInner> {
[INFO] [stdout]    |                            ^^^^^     ----------------- the same lifetime is hidden here
[INFO] [stdout]    |                            |
[INFO] [stdout]    |                            the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub(crate) fn node_mut(&self) -> RefMut<'_, NodeInner> {
[INFO] [stdout]    |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 172 |         f.set_len(0);
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let _ = f.set_len(0);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:316:13
[INFO] [stdout]     |
[INFO] [stdout] 316 |             tx.put(i.to_string().as_bytes(), i.to_string().as_bytes());
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 316 |             let _ = tx.put(i.to_string().as_bytes(), i.to_string().as_bytes());
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:318:13
[INFO] [stdout]     |
[INFO] [stdout] 318 |             tx.commit();
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 318 |             let _ = tx.commit();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:331:17
[INFO] [stdout]     |
[INFO] [stdout] 331 |                 tx.commit();
[INFO] [stdout]     |                 ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 331 |                 let _ = tx.commit();
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:336:13
[INFO] [stdout]     |
[INFO] [stdout] 336 |             i.join();
[INFO] [stdout]     |             ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 336 |             let _ = i.join();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:353:9
[INFO] [stdout]     |
[INFO] [stdout] 353 |         tx.commit();
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 353 |         let _ = tx.commit();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:362:9
[INFO] [stdout]     |
[INFO] [stdout] 362 |         tx1.put(b"001", b"123");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 362 |         let _ = tx1.put(b"001", b"123");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:363:9
[INFO] [stdout]     |
[INFO] [stdout] 363 |         tx1.put(b"005", b"ccc");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 363 |         let _ = tx1.put(b"005", b"ccc");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:364:9
[INFO] [stdout]     |
[INFO] [stdout] 364 |         tx1.commit();
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 364 |         let _ = tx1.commit();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:366:9
[INFO] [stdout]     |
[INFO] [stdout] 366 |         tx2.put(b"002", b"bbb");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 366 |         let _ = tx2.put(b"002", b"bbb");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:367:9
[INFO] [stdout]     |
[INFO] [stdout] 367 |         tx2.put(b"003", b"ccc");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 367 |         let _ = tx2.put(b"003", b"ccc");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:368:9
[INFO] [stdout]     |
[INFO] [stdout] 368 |         tx2.put(b"004", b"ddd");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 368 |         let _ = tx2.put(b"004", b"ddd");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:369:9
[INFO] [stdout]     |
[INFO] [stdout] 369 |         tx2.commit();
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 369 |         let _ = tx2.commit();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:372:9
[INFO] [stdout]     |
[INFO] [stdout] 372 |         tx3.delete(b"001");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 372 |         let _ = tx3.delete(b"001");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:374:9
[INFO] [stdout]     |
[INFO] [stdout] 374 |         tx3.commit();
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 374 |         let _ = tx3.commit();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:381:9
[INFO] [stdout]     |
[INFO] [stdout] 381 |         tx4.commit();
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 381 |         let _ = tx4.commit();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:388:9
[INFO] [stdout]     |
[INFO] [stdout] 388 |         tx1.put(b"001", b"aaa");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 388 |         let _ = tx1.put(b"001", b"aaa");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:389:9
[INFO] [stdout]     |
[INFO] [stdout] 389 |         tx1.put(b"005", b"ccc");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 389 |         let _ = tx1.put(b"005", b"ccc");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/db.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         tx4.commit();
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 397 |         let _ = tx4.commit();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.73s
[INFO] running `Command { std: "docker" "inspect" "9ef38dc3a7b4976d96a3dfdce2eb33d00c3c5ba35330748964cd68067828d7bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ef38dc3a7b4976d96a3dfdce2eb33d00c3c5ba35330748964cd68067828d7bd", kill_on_drop: false }`
[INFO] [stdout] 9ef38dc3a7b4976d96a3dfdce2eb33d00c3c5ba35330748964cd68067828d7bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d79bfa0f19898a25a89663caec2d841d5dff77d252eddc88b702993a403d7d0d
[INFO] running `Command { std: "docker" "start" "-a" "d79bfa0f19898a25a89663caec2d841d5dff77d252eddc88b702993a403d7d0d", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `ops::Deref`
[INFO] [stderr]  --> src/error.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{io, ops::Deref};
[INFO] [stderr]   |               ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `RefMut`, `io::WriterPanicked`, and `marker::PhantomData`
[INFO] [stderr]  --> src/tx.rs:1:43
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{borrow::Borrow, cell::{RefCell, RefMut}, collections::HashMap, io::WriterPanicked, marker::PhantomData, sync::{Arc, Weak}};
[INFO] [stderr]   |                                           ^^^^^^                         ^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `default`
[INFO] [stderr]  --> src/freelist.rs:1:33
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{collections::HashMap, default, mem::size_of};
[INFO] [stderr]   |                                 ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `db`
[INFO] [stderr]  --> src/node.rs:3:32
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::{config::PAGE_SIZE, db, page::{BranchPageElement, LeafPageElement, Page, PageFlag, PgId, BRANCH_ELEMENT_SIZE, LEAF_ELEMENT_SIZ...
[INFO] [stderr]   |                                ^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `borrow::Borrow`
[INFO] [stderr]  --> src/cursor.rs:1:11
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{borrow::Borrow, sync::Arc};
[INFO] [stderr]   |           ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `WeakTx` and `db`
[INFO] [stderr]  --> src/cursor.rs:5:14
[INFO] [stderr]   |
[INFO] [stderr] 5 | use crate::{ db, node::{Node, WeakNode}, page::{Page, PageFlag, PgId}, tx::{PageNode, Tx, WeakTx}};
[INFO] [stderr]   |              ^^                                                                           ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around match arm expression
[INFO] [stderr]    --> src/cursor.rs:238:30
[INFO] [stderr]     |
[INFO] [stderr] 238 |                     Ok(v) => (v),
[INFO] [stderr]     |                              ^ ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 238 -                     Ok(v) => (v),
[INFO] [stderr] 238 +                     Ok(v) => v,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around match arm expression
[INFO] [stderr]    --> src/cursor.rs:239:31
[INFO] [stderr]     |
[INFO] [stderr] 239 |                     Err(e) => (e),
[INFO] [stderr]     |                               ^ ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 239 -                     Err(e) => (e),
[INFO] [stderr] 239 +                     Err(e) => e,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around match arm expression
[INFO] [stderr]    --> src/cursor.rs:250:30
[INFO] [stderr]     |
[INFO] [stderr] 250 |                     Ok(v) => (v),
[INFO] [stderr]     |                              ^ ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 250 -                     Ok(v) => (v),
[INFO] [stderr] 250 +                     Ok(v) => v,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around match arm expression
[INFO] [stderr]    --> src/cursor.rs:251:31
[INFO] [stderr]     |
[INFO] [stderr] 251 |                     Err(e) => (e),
[INFO] [stderr]     |                               ^ ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 251 -                     Err(e) => (e),
[INFO] [stderr] 251 +                     Err(e) => e,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `atomic::AtomicU64` and `default`
[INFO] [stderr]  --> src/db.rs:1:40
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{borrow::{Borrow, BorrowMut}, default, fs::{File, OpenOptions}, io::Write, ptr::null, sync::{atomic::AtomicU64, Arc, Weak}};
[INFO] [stderr]   |                                        ^^^^^^^                                                        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `TxInner` and `db`
[INFO] [stderr]  --> src/db.rs:5:81
[INFO] [stderr]   |
[INFO] [stderr] 5 | ...PAGE_SIZE}, db, freelist::FreeList, page::{Meta, OwnedPage, Page, PageFlag, PgId, MAGIC, VERSION}, tx::{Tx, TxId, TxInner}};
[INFO] [stderr]   |                ^^                                                                                                    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `bitflags::Flags`
[INFO] [stderr]  --> src/page.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use bitflags::Flags;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Borrow`
[INFO] [stderr]  --> src/node.rs:1:20
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{borrow::{Borrow, BorrowMut}, cell::{Ref, RefCell, RefMut}, collections::HashSet, sync::{Arc, Weak}};
[INFO] [stderr]   |                    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BorrowMut`
[INFO] [stderr]  --> src/node.rs:1:28
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{borrow::{Borrow, BorrowMut}, cell::{Ref, RefCell, RefMut}, collections::HashSet, sync::{Arc, Weak}};
[INFO] [stderr]   |                            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `bitflags::Flags`
[INFO] [stderr]  --> src/cursor.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use bitflags::Flags;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BorrowMut`
[INFO] [stderr]  --> src/db.rs:1:28
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{borrow::{Borrow, BorrowMut}, default, fs::{File, OpenOptions}, io::Write, ptr::null, sync::{atomic::AtomicU64, Arc, Weak}};
[INFO] [stderr]   |                            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ow`
[INFO] [stderr]    --> src/tx.rs:172:13
[INFO] [stderr]     |
[INFO] [stderr] 172 |         let ow = OwnedPage::from_vec(buf);
[INFO] [stderr]     |             ^^ help: if this is intentional, prefix it with an underscore: `_ow`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]    --> src/tx.rs:197:13
[INFO] [stderr]     |
[INFO] [stderr] 197 |         let item = c.seek(key)?;
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/tx.rs:273:13
[INFO] [stderr]     |
[INFO] [stderr] 273 |         let mut root = n.clone();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `m`
[INFO] [stderr]    --> src/freelist.rs:141:17
[INFO] [stderr]     |
[INFO] [stderr] 141 |         let mut m: Vec<PgId> = Vec::with_capacity(self.pending_count());
[INFO] [stderr]     |                 ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/freelist.rs:141:13
[INFO] [stderr]     |
[INFO] [stderr] 141 |         let mut m: Vec<PgId> = Vec::with_capacity(self.pending_count());
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/node.rs:257:18
[INFO] [stderr]     |
[INFO] [stderr] 257 |             Some(mut p) => {
[INFO] [stderr]     |                  ----^
[INFO] [stderr]     |                  |
[INFO] [stderr]     |                  help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]    --> src/node.rs:531:13
[INFO] [stderr]     |
[INFO] [stderr] 531 |         let len = nodes.len();
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_id`
[INFO] [stderr]    --> src/node.rs:544:17
[INFO] [stderr]     |
[INFO] [stderr] 544 |             let new_id = page.id;
[INFO] [stderr]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_id`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/node.rs:499:13
[INFO] [stderr]     |
[INFO] [stderr] 499 |         let mut tx = atx.clone();
[INFO] [stderr]     |             ----^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/node.rs:572:21
[INFO] [stderr]     |
[INFO] [stderr] 572 |         if let Some(mut p) = parent_node {
[INFO] [stderr]     |                     ----^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `index`
[INFO] [stderr]    --> src/cursor.rs:127:21
[INFO] [stderr]     |
[INFO] [stderr] 127 |             let mut index: usize = 0;
[INFO] [stderr]     |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/cursor.rs:127:17
[INFO] [stderr]     |
[INFO] [stderr] 127 |             let mut index: usize = 0;
[INFO] [stderr]     |                 ----^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `idx`
[INFO] [stderr]    --> src/cursor.rs:153:13
[INFO] [stderr]     |
[INFO] [stderr] 153 |         let idx = ref_elem.index;
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/cursor.rs:303:13
[INFO] [stderr]     |
[INFO] [stderr] 303 |         let mut elem = self.stack.first().unwrap();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/db.rs:119:13
[INFO] [stderr]     |
[INFO] [stderr] 119 |         let mut tx = Tx::new(true, WeakDB(Arc::downgrade(&self.0)), meta);
[INFO] [stderr]     |             ----^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/db.rs:140:13
[INFO] [stderr]     |
[INFO] [stderr] 140 |         let mut meta = self.0.state.try_read().unwrap().borrow().meta();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/db.rs:141:13
[INFO] [stderr]     |
[INFO] [stderr] 141 |         let mut tx = Tx::new(false, WeakDB(Arc::downgrade(&self.0)), meta);
[INFO] [stderr]     |             ----^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `opt`
[INFO] [stderr]    --> src/db.rs:164:29
[INFO] [stderr]     |
[INFO] [stderr] 164 |     pub fn open(path: &str, opt: Options) -> Result<DB> {
[INFO] [stderr]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_opt`
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/tx.rs:22:19
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub struct WeakTx(pub(crate) Weak<TxInner>);
[INFO] [stderr]    |            ------ ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |            |
[INFO] [stderr]    |            field in this struct
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing this field
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `release` is never used
[INFO] [stderr]    --> src/freelist.rs:167:19
[INFO] [stderr]     |
[INFO] [stderr]  15 | impl FreeList {
[INFO] [stderr]     | ------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 167 |     pub(crate) fn release(&mut self, txid: TxId) {
[INFO] [stderr]     |                   ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `value` is never used
[INFO] [stderr]   --> src/cursor.rs:44:19
[INFO] [stderr]    |
[INFO] [stderr] 31 | impl<'a> Item<'a> {
[INFO] [stderr]    | ----------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 44 |     pub(crate) fn value(&self) -> Option<&'a [u8]> {
[INFO] [stderr]    |                   ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `begin_rwtx` and `begin_tx` are never used
[INFO] [stderr]    --> src/db.rs:113:8
[INFO] [stderr]     |
[INFO] [stderr] 112 | impl DB {
[INFO] [stderr]     | ------- methods in this implementation
[INFO] [stderr] 113 |     fn begin_rwtx(&self) -> Tx {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 136 |     fn begin_tx(&self) -> Tx {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `DEFAULT_OPTIONS` is never used
[INFO] [stderr]    --> src/db.rs:293:7
[INFO] [stderr]     |
[INFO] [stderr] 293 | const DEFAULT_OPTIONS: Options = Options {
[INFO] [stderr]     |       ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/tx.rs:103:9
[INFO] [stderr]     |
[INFO] [stderr] 103 |         self.close();
[INFO] [stderr]     |         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 103 |         let _ = self.close();
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/node.rs:69:17
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn node(&self) -> Ref<NodeInner> {
[INFO] [stderr]    |                 ^^^^^     -------------- the same lifetime is hidden here
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn node(&self) -> Ref<'_, NodeInner> {
[INFO] [stderr]    |                               +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/node.rs:73:28
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub(crate) fn node_mut(&self) -> RefMut<NodeInner> {
[INFO] [stderr]    |                            ^^^^^     ----------------- the same lifetime is hidden here
[INFO] [stderr]    |                            |
[INFO] [stderr]    |                            the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub(crate) fn node_mut(&self) -> RefMut<'_, NodeInner> {
[INFO] [stderr]    |                                             +++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:172:9
[INFO] [stderr]     |
[INFO] [stderr] 172 |         f.set_len(0);
[INFO] [stderr]     |         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 172 |         let _ = f.set_len(0);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ptr::null_mut`
[INFO] [stderr]    --> src/node.rs:590:9
[INFO] [stderr]     |
[INFO] [stderr] 590 |     use std::ptr::null_mut;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::db::DBInnerState`
[INFO] [stderr]    --> src/node.rs:592:9
[INFO] [stderr]     |
[INFO] [stderr] 592 |     use crate::db::DBInnerState;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::time`
[INFO] [stderr]    --> src/db.rs:301:9
[INFO] [stderr]     |
[INFO] [stderr] 301 |     use core::time;
[INFO] [stderr]     |         ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str`
[INFO] [stderr]    --> src/db.rs:302:9
[INFO] [stderr]     |
[INFO] [stderr] 302 |     use std::str;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread::sleep`
[INFO] [stderr]    --> src/db.rs:304:9
[INFO] [stderr]     |
[INFO] [stderr] 304 |     use std::thread::sleep;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread::JoinHandle`
[INFO] [stderr]    --> src/db.rs:305:9
[INFO] [stderr]     |
[INFO] [stderr] 305 |     use std::thread::JoinHandle;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread::Thread`
[INFO] [stderr]    --> src/db.rs:306:9
[INFO] [stderr]     |
[INFO] [stderr] 306 |     use std::thread::Thread;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::time::Duration`
[INFO] [stderr]    --> src/db.rs:307:9
[INFO] [stderr]     |
[INFO] [stderr] 307 |     use std::time::Duration;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pgid`
[INFO] [stderr]    --> src/freelist.rs:204:13
[INFO] [stderr]     |
[INFO] [stderr] 204 |         let pgid = freelist.allocate(1);
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_pgid`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `freelist`
[INFO] [stderr]    --> src/freelist.rs:219:17
[INFO] [stderr]     |
[INFO] [stderr] 219 |         let mut freelist = FreeList {
[INFO] [stderr]     |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_freelist`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/freelist.rs:219:13
[INFO] [stderr]     |
[INFO] [stderr] 219 |         let mut freelist = FreeList {
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/freelist.rs:238:13
[INFO] [stderr]     |
[INFO] [stderr] 238 |         let mut freelist = FreeList {
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/node.rs:598:13
[INFO] [stderr]     |
[INFO] [stderr] 598 |         let mut node1 = NodeInner::new().leaf(true).build();
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tx`
[INFO] [stderr]    --> src/db.rs:344:17
[INFO] [stderr]     |
[INFO] [stderr] 344 |         let mut tx = unsafe { (&*(db.0.state.try_read().unwrap().meta0)).txid };
[INFO] [stderr]     |                 ^^ help: if this is intentional, prefix it with an underscore: `_tx`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/db.rs:344:13
[INFO] [stderr]     |
[INFO] [stderr] 344 |         let mut tx = unsafe { (&*(db.0.state.try_read().unwrap().meta0)).txid };
[INFO] [stderr]     |             ----^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/db.rs:360:13
[INFO] [stderr]     |
[INFO] [stderr] 360 |         let mut db = DBInner::open("./test2.db", DEFAULT_OPTIONS).unwrap();
[INFO] [stderr]     |             ----^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/db.rs:385:13
[INFO] [stderr]     |
[INFO] [stderr] 385 |         let mut db = DBInner::open("./test2.db", DEFAULT_OPTIONS).unwrap();
[INFO] [stderr]     |             ----^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:316:13
[INFO] [stderr]     |
[INFO] [stderr] 316 |             tx.put(i.to_string().as_bytes(), i.to_string().as_bytes());
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 316 |             let _ = tx.put(i.to_string().as_bytes(), i.to_string().as_bytes());
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:318:13
[INFO] [stderr]     |
[INFO] [stderr] 318 |             tx.commit();
[INFO] [stderr]     |             ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 318 |             let _ = tx.commit();
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:331:17
[INFO] [stderr]     |
[INFO] [stderr] 331 |                 tx.commit();
[INFO] [stderr]     |                 ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 331 |                 let _ = tx.commit();
[INFO] [stderr]     |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:336:13
[INFO] [stderr]     |
[INFO] [stderr] 336 |             i.join();
[INFO] [stderr]     |             ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 336 |             let _ = i.join();
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:353:9
[INFO] [stderr]     |
[INFO] [stderr] 353 |         tx.commit();
[INFO] [stderr]     |         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 353 |         let _ = tx.commit();
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:362:9
[INFO] [stderr]     |
[INFO] [stderr] 362 |         tx1.put(b"001", b"123");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 362 |         let _ = tx1.put(b"001", b"123");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:363:9
[INFO] [stderr]     |
[INFO] [stderr] 363 |         tx1.put(b"005", b"ccc");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 363 |         let _ = tx1.put(b"005", b"ccc");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:364:9
[INFO] [stderr]     |
[INFO] [stderr] 364 |         tx1.commit();
[INFO] [stderr]     |         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 364 |         let _ = tx1.commit();
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:366:9
[INFO] [stderr]     |
[INFO] [stderr] 366 |         tx2.put(b"002", b"bbb");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 366 |         let _ = tx2.put(b"002", b"bbb");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:367:9
[INFO] [stderr]     |
[INFO] [stderr] 367 |         tx2.put(b"003", b"ccc");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 367 |         let _ = tx2.put(b"003", b"ccc");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:368:9
[INFO] [stderr]     |
[INFO] [stderr] 368 |         tx2.put(b"004", b"ddd");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 368 |         let _ = tx2.put(b"004", b"ddd");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:369:9
[INFO] [stderr]     |
[INFO] [stderr] 369 |         tx2.commit();
[INFO] [stderr]     |         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 369 |         let _ = tx2.commit();
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:372:9
[INFO] [stderr]     |
[INFO] [stderr] 372 |         tx3.delete(b"001");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 372 |         let _ = tx3.delete(b"001");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:374:9
[INFO] [stderr]     |
[INFO] [stderr] 374 |         tx3.commit();
[INFO] [stderr]     |         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 374 |         let _ = tx3.commit();
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:381:9
[INFO] [stderr]     |
[INFO] [stderr] 381 |         tx4.commit();
[INFO] [stderr]     |         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 381 |         let _ = tx4.commit();
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:388:9
[INFO] [stderr]     |
[INFO] [stderr] 388 |         tx1.put(b"001", b"aaa");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 388 |         let _ = tx1.put(b"001", b"aaa");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:389:9
[INFO] [stderr]     |
[INFO] [stderr] 389 |         tx1.put(b"005", b"ccc");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 389 |         let _ = tx1.put(b"005", b"ccc");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/db.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         tx4.commit();
[INFO] [stderr]     |         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 397 |         let _ = tx4.commit();
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `rultdb` (lib) generated 44 warnings (run `cargo fix --lib -p rultdb` to apply 22 suggestions)
[INFO] [stderr] warning: `rultdb` (lib test) generated 76 warnings (41 duplicates) (run `cargo fix --lib -p rultdb --tests` to apply 14 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rultdb-6e64e1002333eab0)
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test freelist::tests::test_count ... ok
[INFO] [stdout] test freelist::tests::test_copy_all ... ok
[INFO] [stdout] test node::tests::test_node_new ... ok
[INFO] [stdout] test freelist::tests::test_freelist_allocate ... ok
[INFO] [stdout] test db::tests::test_db_mmap ... FAILED
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] [stdout] test db::tests::test_multi_thread ... FAILED
[INFO] [stdout] test db::tests::test_tx_delete ... FAILED
[INFO] [stdout] test db::tests::test_tx_put_get ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- db::tests::test_db_mmap stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'db::tests::test_db_mmap' panicked at src/db.rs:147:34:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: DBOpenFail(Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" })
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x593986fe2232 - std::backtrace_rs::backtrace::libunwind::trace::h2d45396358f41939
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x593986fe2232 - std::backtrace_rs::backtrace::trace_unsynchronized::hffcefc0b67f1d6e2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x593986fe2232 - std::sys::backtrace::_print_fmt::hd72f71d23b436b92
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x593986fe2232 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x593987007de3 - core::fmt::rt::Argument::fmt::h2c56b3114963061a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x593987007de3 - core::fmt::write::h8a494366950f23bb
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25
[INFO] [stdout]    6:     0x593986fdf163 - std::io::default_write_fmt::h7b8824096454f323
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x593986fdf163 - std::io::Write::write_fmt::h4e71294925c334d0
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x593986fe2082 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x593986fe37a9 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x593986fe35de - std::panicking::default_hook::h2c66fc99e962531d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x593986f971f4 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb6bd65493727d71a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x593986f971f4 - test::test_main_with_exit_callback::{{closure}}::h60217ec76a0ece4a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x593986fe417e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h318e4efb8c1a5689
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x593986fe417e - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x593986fe3f4a - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x593986fe2729 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x593986fe3bdd - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x593987006830 - core::panicking::panic_fmt::h62f63d096dd276af
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x593987006c96 - core::result::unwrap_failed::h95bc3f5a607b2c95
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1765:5
[INFO] [stdout]   20:     0x593986f416c4 - core::result::Result<T,E>::unwrap::h0aa8781ebbd22c89
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1167:23
[INFO] [stdout]   21:     0x593986f416c4 - rultdb::db::DB::open::he4742caac4cd95b1
[INFO] [stdout]                                at /opt/rustwide/workdir/src/db.rs:147:34
[INFO] [stdout]   22:     0x593986f446cc - rultdb::db::tests::test_db_mmap::hd56d64b06b543ac0
[INFO] [stdout]                                at /opt/rustwide/workdir/src/db.rs:343:18
[INFO] [stdout]   23:     0x593986f44697 - rultdb::db::tests::test_db_mmap::{{closure}}::hfca0dd874c5f58bc
[INFO] [stdout]                                at /opt/rustwide/workdir/src/db.rs:342:22
[INFO] [stdout]   24:     0x593986f46c26 - core::ops::function::FnOnce::call_once::h18437586b4f7eb13
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   25:     0x593986f9ca5b - core::ops::function::FnOnce::call_once::h1f9474f1347fff52
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   26:     0x593986f9ca5b - test::__rust_begin_short_backtrace::ha52ab26e77157f03
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:648:18
[INFO] [stdout]   27:     0x593986f9bb95 - test::run_test_in_process::{{closure}}::h229c1a11a50b261f
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:74
[INFO] [stdout]   28:     0x593986f9bb95 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h78821afbf97b39a9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   29:     0x593986f9bb95 - std::panicking::catch_unwind::do_call::h53abf3ed5bd32ba3
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   30:     0x593986f9bb95 - std::panicking::catch_unwind::h6deb5fe1e91873c9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   31:     0x593986f9bb95 - std::panic::catch_unwind::hea0829b6b565654b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   32:     0x593986f9bb95 - test::run_test_in_process::hdc44dfecea3db21b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:27
[INFO] [stdout]   33:     0x593986f9bb95 - test::run_test::{{closure}}::h0364ba59bf23f652
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:592:43
[INFO] [stdout]   34:     0x593986f5f794 - test::run_test::{{closure}}::h32730b304eec05da
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:622:41
[INFO] [stdout]   35:     0x593986f5f794 - std::sys::backtrace::__rust_begin_short_backtrace::h177cb952fc54ad2c
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   36:     0x593986f6316a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h119d903520007597
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   37:     0x593986f6316a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hab88401d606702a6
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   38:     0x593986f6316a - std::panicking::catch_unwind::do_call::h163fe12cca9901c2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   39:     0x593986f6316a - std::panicking::catch_unwind::he81557d0e17cc1bc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   40:     0x593986f6316a - std::panic::catch_unwind::hc2b8e79c20593955
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   41:     0x593986f6316a - std::thread::Builder::spawn_unchecked_::{{closure}}::hfa6b4978e07815cc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   42:     0x593986f6316a - core::ops::function::FnOnce::call_once{{vtable.shim}}::hddcd7484a13fd793
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   43:     0x593986fe70ff - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5924238c754de3b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   44:     0x593986fe70ff - std::sys::pal::unix::thread::Thread::new::thread_start::hb6e99e73da4d28f8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/pal/unix/thread.rs:107:17
[INFO] [stdout]   45:     0x75fb01de4aa4 - <unknown>
[INFO] [stdout]   46:     0x75fb01e71a34 - clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- db::tests::test_multi_thread stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'db::tests::test_multi_thread' panicked at src/db.rs:147:34:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: DBOpenFail(Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" })
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x593986fe2232 - std::backtrace_rs::backtrace::libunwind::trace::h2d45396358f41939
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x593986fe2232 - std::backtrace_rs::backtrace::trace_unsynchronized::hffcefc0b67f1d6e2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x593986fe2232 - std::sys::backtrace::_print_fmt::hd72f71d23b436b92
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x593986fe2232 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x593987007de3 - core::fmt::rt::Argument::fmt::h2c56b3114963061a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x593987007de3 - core::fmt::write::h8a494366950f23bb
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25
[INFO] [stdout]    6:     0x593986fdf163 - std::io::default_write_fmt::h7b8824096454f323
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x593986fdf163 - std::io::Write::write_fmt::h4e71294925c334d0
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x593986fe2082 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x593986fe37a9 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x593986fe35de - std::panicking::default_hook::h2c66fc99e962531d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x593986f971f4 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb6bd65493727d71a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x593986f971f4 - test::test_main_with_exit_callback::{{closure}}::h60217ec76a0ece4a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x593986fe417e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h318e4efb8c1a5689
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x593986fe417e - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x593986fe3f4a - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x593986fe2729 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x593986fe3bdd - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x593987006830 - core::panicking::panic_fmt::h62f63d096dd276af
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x593987006c96 - core::result::unwrap_failed::h95bc3f5a607b2c95
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1765:5
[INFO] [stdout]   20:     0x593986f416c4 - core::result::Result<T,E>::unwrap::h0aa8781ebbd22c89
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1167:23
[INFO] [stdout]   21:     0x593986f416c4 - rultdb::db::DB::open::he4742caac4cd95b1
[INFO] [stdout]                                at /opt/rustwide/workdir/src/db.rs:147:34
[INFO] [stdout]   22:     0x593986f43c04 - rultdb::db::tests::test_multi_thread::h6a27913d55b6584c
[INFO] [stdout]                                at /opt/rustwide/workdir/src/db.rs:311:18
[INFO] [stdout]   23:     0x593986f43bc7 - rultdb::db::tests::test_multi_thread::{{closure}}::hed894ed2a3d293e9
[INFO] [stdout]                                at /opt/rustwide/workdir/src/db.rs:310:27
[INFO] [stdout]   24:     0x593986f46b46 - core::ops::function::FnOnce::call_once::h020c3f097d2de0e9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   25:     0x593986f9ca5b - core::ops::function::FnOnce::call_once::h1f9474f1347fff52
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   26:     0x593986f9ca5b - test::__rust_begin_short_backtrace::ha52ab26e77157f03
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:648:18
[INFO] [stdout]   27:     0x593986f9bb95 - test::run_test_in_process::{{closure}}::h229c1a11a50b261f
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:74
[INFO] [stdout]   28:     0x593986f9bb95 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h78821afbf97b39a9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   29:     0x593986f9bb95 - std::panicking::catch_unwind::do_call::h53abf3ed5bd32ba3
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   30:     0x593986f9bb95 - std::panicking::catch_unwind::h6deb5fe1e91873c9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   31:     0x593986f9bb95 - std::panic::catch_unwind::hea0829b6b565654b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   32:     0x593986f9bb95 - test::run_test_in_process::hdc44dfecea3db21b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:27
[INFO] [stdout]   33:     0x593986f9bb95 - test::run_test::{{closure}}::h0364ba59bf23f652
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:592:43
[INFO] [stdout]   34:     0x593986f5f794 - test::run_test::{{closure}}::h32730b304eec05da
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:622:41
[INFO] [stdout]   35:     0x593986f5f794 - std::sys::backtrace::__rust_begin_short_backtrace::h177cb952fc54ad2c
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   36:     0x593986f6316a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h119d903520007597
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   37:     0x593986f6316a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hab88401d606702a6
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   38:     0x593986f6316a - std::panicking::catch_unwind::do_call::h163fe12cca9901c2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   39:     0x593986f6316a - std::panicking::catch_unwind::he81557d0e17cc1bc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   40:     0x593986f6316a - std::panic::catch_unwind::hc2b8e79c20593955
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   41:     0x593986f6316a - std::thread::Builder::spawn_unchecked_::{{closure}}::hfa6b4978e07815cc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   42:     0x593986f6316a - core::ops::function::FnOnce::call_once{{vtable.shim}}::hddcd7484a13fd793
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   43:     0x593986fe70ff - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5924238c754de3b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   44:     0x593986fe70ff - std::sys::pal::unix::thread::Thread::new::thread_start::hb6e99e73da4d28f8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/pal/unix/thread.rs:107:17
[INFO] [stdout]   45:     0x75fb01de4aa4 - <unknown>
[INFO] [stdout]   46:     0x75fb01e71a34 - clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- db::tests::test_tx_delete stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'db::tests::test_tx_delete' panicked at src/db.rs:360:67:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: DBOpenFail(Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" })
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x593986fe2232 - std::backtrace_rs::backtrace::libunwind::trace::h2d45396358f41939
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x593986fe2232 - std::backtrace_rs::backtrace::trace_unsynchronized::hffcefc0b67f1d6e2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x593986fe2232 - std::sys::backtrace::_print_fmt::hd72f71d23b436b92
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x593986fe2232 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x593987007de3 - core::fmt::rt::Argument::fmt::h2c56b3114963061a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x593987007de3 - core::fmt::write::h8a494366950f23bb
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25
[INFO] [stdout]    6:     0x593986fdf163 - std::io::default_write_fmt::h7b8824096454f323
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x593986fdf163 - std::io::Write::write_fmt::h4e71294925c334d0
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x593986fe2082 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x593986fe37a9 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x593986fe35de - std::panicking::default_hook::h2c66fc99e962531d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x593986f971f4 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb6bd65493727d71a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x593986f971f4 - test::test_main_with_exit_callback::{{closure}}::h60217ec76a0ece4a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x593986fe417e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h318e4efb8c1a5689
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x593986fe417e - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x593986fe3f4a - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x593986fe2729 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x593986fe3bdd - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x593987006830 - core::panicking::panic_fmt::h62f63d096dd276af
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x593987006c96 - core::result::unwrap_failed::h95bc3f5a607b2c95
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1765:5
[INFO] [stdout]   20:     0x593986f44d28 - core::result::Result<T,E>::unwrap::h0aa8781ebbd22c89
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1167:23
[INFO] [stdout]   21:     0x593986f44d28 - rultdb::db::tests::test_tx_delete::hbeb77b1c23975688
[INFO] [stdout]                                at /opt/rustwide/workdir/src/db.rs:360:67
[INFO] [stdout]   22:     0x593986f44c77 - rultdb::db::tests::test_tx_delete::{{closure}}::h97eeb3f7c5b588fb
[INFO] [stdout]                                at /opt/rustwide/workdir/src/db.rs:359:24
[INFO] [stdout]   23:     0x593986f46c66 - core::ops::function::FnOnce::call_once::h1b1a559e5fdaf9f5
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   24:     0x593986f9ca5b - core::ops::function::FnOnce::call_once::h1f9474f1347fff52
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   25:     0x593986f9ca5b - test::__rust_begin_short_backtrace::ha52ab26e77157f03
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:648:18
[INFO] [stdout]   26:     0x593986f9bb95 - test::run_test_in_process::{{closure}}::h229c1a11a50b261f
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:74
[INFO] [stdout]   27:     0x593986f9bb95 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h78821afbf97b39a9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x593986f9bb95 - std::panicking::catch_unwind::do_call::h53abf3ed5bd32ba3
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   29:     0x593986f9bb95 - std::panicking::catch_unwind::h6deb5fe1e91873c9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   30:     0x593986f9bb95 - std::panic::catch_unwind::hea0829b6b565654b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x593986f9bb95 - test::run_test_in_process::hdc44dfecea3db21b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:27
[INFO] [stdout]   32:     0x593986f9bb95 - test::run_test::{{closure}}::h0364ba59bf23f652
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:592:43
[INFO] [stdout]   33:     0x593986f5f794 - test::run_test::{{closure}}::h32730b304eec05da
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:622:41
[INFO] [stdout]   34:     0x593986f5f794 - std::sys::backtrace::__rust_begin_short_backtrace::h177cb952fc54ad2c
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   35:     0x593986f6316a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h119d903520007597
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   36:     0x593986f6316a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hab88401d606702a6
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x593986f6316a - std::panicking::catch_unwind::do_call::h163fe12cca9901c2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   38:     0x593986f6316a - std::panicking::catch_unwind::he81557d0e17cc1bc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   39:     0x593986f6316a - std::panic::catch_unwind::hc2b8e79c20593955
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x593986f6316a - std::thread::Builder::spawn_unchecked_::{{closure}}::hfa6b4978e07815cc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   41:     0x593986f6316a - core::ops::function::FnOnce::call_once{{vtable.shim}}::hddcd7484a13fd793
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   42:     0x593986fe70ff - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5924238c754de3b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   43:     0x593986fe70ff - std::sys::pal::unix::thread::Thread::new::thread_start::hb6e99e73da4d28f8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/pal/unix/thread.rs:107:17
[INFO] [stdout]   44:     0x75fb01de4aa4 - <unknown>
[INFO] [stdout]   45:     0x75fb01e71a34 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- db::tests::test_tx_put_get stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'db::tests::test_tx_put_get' panicked at src/db.rs:385:67:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: DBOpenFail(Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" })
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x593986fe2232 - std::backtrace_rs::backtrace::libunwind::trace::h2d45396358f41939
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x593986fe2232 - std::backtrace_rs::backtrace::trace_unsynchronized::hffcefc0b67f1d6e2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x593986fe2232 - std::sys::backtrace::_print_fmt::hd72f71d23b436b92
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x593986fe2232 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x593987007de3 - core::fmt::rt::Argument::fmt::h2c56b3114963061a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x593987007de3 - core::fmt::write::h8a494366950f23bb
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25
[INFO] [stdout]    6:     0x593986fdf163 - std::io::default_write_fmt::h7b8824096454f323
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x593986fdf163 - std::io::Write::write_fmt::h4e71294925c334d0
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x593986fe2082 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x593986fe37a9 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x593986fe35de - std::panicking::default_hook::h2c66fc99e962531d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x593986f971f4 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb6bd65493727d71a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x593986f971f4 - test::test_main_with_exit_callback::{{closure}}::h60217ec76a0ece4a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x593986fe417e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h318e4efb8c1a5689
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x593986fe417e - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x593986fe3f4a - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x593986fe2729 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x593986fe3bdd - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x593987006830 - core::panicking::panic_fmt::h62f63d096dd276af
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x593987006c96 - core::result::unwrap_failed::h95bc3f5a607b2c95
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1765:5
[INFO] [stdout]   20:     0x593986f455d8 - core::result::Result<T,E>::unwrap::h0aa8781ebbd22c89
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1167:23
[INFO] [stdout]   21:     0x593986f455d8 - rultdb::db::tests::test_tx_put_get::ha51d5900e285567a
[INFO] [stdout]                                at /opt/rustwide/workdir/src/db.rs:385:67
[INFO] [stdout]   22:     0x593986f45527 - rultdb::db::tests::test_tx_put_get::{{closure}}::h45b8cf5b6ddb624f
[INFO] [stdout]                                at /opt/rustwide/workdir/src/db.rs:384:25
[INFO] [stdout]   23:     0x593986f472a6 - core::ops::function::FnOnce::call_once::he7c6258cadf4ecd7
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   24:     0x593986f9ca5b - core::ops::function::FnOnce::call_once::h1f9474f1347fff52
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   25:     0x593986f9ca5b - test::__rust_begin_short_backtrace::ha52ab26e77157f03
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:648:18
[INFO] [stdout]   26:     0x593986f9bb95 - test::run_test_in_process::{{closure}}::h229c1a11a50b261f
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:74
[INFO] [stdout]   27:     0x593986f9bb95 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h78821afbf97b39a9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x593986f9bb95 - std::panicking::catch_unwind::do_call::h53abf3ed5bd32ba3
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   29:     0x593986f9bb95 - std::panicking::catch_unwind::h6deb5fe1e91873c9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   30:     0x593986f9bb95 - std::panic::catch_unwind::hea0829b6b565654b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x593986f9bb95 - test::run_test_in_process::hdc44dfecea3db21b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:27
[INFO] [stdout]   32:     0x593986f9bb95 - test::run_test::{{closure}}::h0364ba59bf23f652
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:592:43
[INFO] [stdout]   33:     0x593986f5f794 - test::run_test::{{closure}}::h32730b304eec05da
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:622:41
[INFO] [stdout]   34:     0x593986f5f794 - std::sys::backtrace::__rust_begin_short_backtrace::h177cb952fc54ad2c
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   35:     0x593986f6316a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h119d903520007597
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   36:     0x593986f6316a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hab88401d606702a6
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x593986f6316a - std::panicking::catch_unwind::do_call::h163fe12cca9901c2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   38:     0x593986f6316a - std::panicking::catch_unwind::he81557d0e17cc1bc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   39:     0x593986f6316a - std::panic::catch_unwind::hc2b8e79c20593955
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x593986f6316a - std::thread::Builder::spawn_unchecked_::{{closure}}::hfa6b4978e07815cc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   41:     0x593986f6316a - core::ops::function::FnOnce::call_once{{vtable.shim}}::hddcd7484a13fd793
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   42:     0x593986fe70ff - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5924238c754de3b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   43:     0x593986fe70ff - std::sys::pal::unix::thread::Thread::new::thread_start::hb6e99e73da4d28f8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/pal/unix/thread.rs:107:17
[INFO] [stdout]   44:     0x75fb01de4aa4 - <unknown>
[INFO] [stdout]   45:     0x75fb01e71a34 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     db::tests::test_db_mmap
[INFO] [stdout]     db::tests::test_multi_thread
[INFO] [stdout]     db::tests::test_tx_delete
[INFO] [stdout]     db::tests::test_tx_put_get
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 4 passed; 4 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d79bfa0f19898a25a89663caec2d841d5dff77d252eddc88b702993a403d7d0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d79bfa0f19898a25a89663caec2d841d5dff77d252eddc88b702993a403d7d0d", kill_on_drop: false }`
[INFO] [stdout] d79bfa0f19898a25a89663caec2d841d5dff77d252eddc88b702993a403d7d0d
