[INFO] cloning repository https://github.com/p1ass/rust-rdbms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/p1ass/rust-rdbms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fp1ass%2Frust-rdbms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fp1ass%2Frust-rdbms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1d1641c907a42e2468dcda402ebdac2658256305
[INFO] checking p1ass/rust-rdbms against 165655a2f1981fef27b31c547ad7631979fc5139 for pr-160235
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fp1ass%2Frust-rdbms" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/p1ass/rust-rdbms
[INFO] finished tweaking git repo https://github.com/p1ass/rust-rdbms
[INFO] tweaked toml for git repo https://github.com/p1ass/rust-rdbms written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/p1ass/rust-rdbms on toolchain 165655a2f1981fef27b31c547ad7631979fc5139
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+165655a2f1981fef27b31c547ad7631979fc5139" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/p1ass/rust-rdbms 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" "+165655a2f1981fef27b31c547ad7631979fc5139" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded redox_syscall v0.2.7
[INFO] [stderr]   Downloaded sha-1 v0.9.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:00c5645b54fe3ce5dae1417175e3c7fb6a6646c021d554ecd63a097b8b9f3602" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] be144544597281d987410f27b5a971a567c6caaf8754cfaa901c1bde218e5fbc
[INFO] running `Command { std: "docker" "start" "be144544597281d987410f27b5a971a567c6caaf8754cfaa901c1bde218e5fbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be144544597281d987410f27b5a971a567c6caaf8754cfaa901c1bde218e5fbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "be144544597281d987410f27b5a971a567c6caaf8754cfaa901c1bde218e5fbc" "/opt/rustwide/cargo-home/bin/cargo" "+165655a2f1981fef27b31c547ad7631979fc5139" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be144544597281d987410f27b5a971a567c6caaf8754cfaa901c1bde218e5fbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "be144544597281d987410f27b5a971a567c6caaf8754cfaa901c1bde218e5fbc" "/opt/rustwide/cargo-home/bin/cargo" "+165655a2f1981fef27b31c547ad7631979fc5139" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling syn v1.0.71
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking cpuid-bool v0.1.2
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking md-5 v0.9.1
[INFO] [stderr]     Checking sha-1 v0.9.4
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling zerocopy-derive v0.2.0
[INFO] [stderr]     Checking zerocopy v0.3.0
[INFO] [stderr]     Checking thiserror v1.0.24
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking rust-rdbms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Page`
[INFO] [stdout]  --> src/query.rs:4:40
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::buffer::{BufferPoolManager, Page};
[INFO] [stdout]   |                                        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Page`
[INFO] [stdout]  --> src/table.rs:2:40
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::buffer::{BufferPoolManager, Page};
[INFO] [stdout]   |                                        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Page`
[INFO] [stdout]  --> src/query.rs:4:40
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::buffer::{BufferPoolManager, Page};
[INFO] [stdout]   |                                        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Page`
[INFO] [stdout]  --> src/table.rs:2:40
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::buffer::{BufferPoolManager, Page};
[INFO] [stdout]   |                                        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `search_pair` is never used
[INFO] [stdout]   --> src/btree/leaf.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl<B: ByteSlice> Leaf<B> {
[INFO] [stdout]    | -------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn search_pair(&self, key: &[u8]) -> Option<Pair> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/btree/branch.rs:59:20
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn pair_at(&self, slot_id: usize) -> Pair {
[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] 59 |     pub fn pair_at(&self, slot_id: usize) -> Pair<'_> {
[INFO] [stdout]    |                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/btree/leaf.rs:49:24
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn search_pair(&self, key: &[u8]) -> Option<Pair> {
[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] 49 |     pub fn search_pair(&self, key: &[u8]) -> Option<Pair<'_>> {
[INFO] [stdout]    |                                                         ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/btree/leaf.rs:54:20
[INFO] [stdout]    |
[INFO] [stdout] 54 |     pub fn pair_at(&self, slot_id: usize) -> Pair {
[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] 54 |     pub fn pair_at(&self, slot_id: usize) -> Pair<'_> {
[INFO] [stdout]    |                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/query.rs:35:14
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor>;
[INFO] [stdout]    |              ^^^^^ the lifetime is elided here                ^^^^^^^^^^^ the same lifetime is hidden 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] 35 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor<'_>>;
[INFO] [stdout]    |                                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/query.rs:45:14
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor> {
[INFO] [stdout]    |              ^^^^^ the lifetime is elided here                ^^^^^^^^^^^ the same lifetime is hidden 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] 45 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor<'_>> {
[INFO] [stdout]    |                                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/query.rs:83:14
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor> {
[INFO] [stdout]    |              ^^^^^ the lifetime is elided here                ^^^^^^^^^^^ the same lifetime is hidden 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] 83 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor<'_>> {
[INFO] [stdout]    |                                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/query.rs:120:14
[INFO] [stdout]     |
[INFO] [stdout] 120 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor> {
[INFO] [stdout]     |              ^^^^^ the lifetime is elided here                ^^^^^^^^^^^ the same lifetime is hidden 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] 120 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor<'_>> {
[INFO] [stdout]     |                                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/table.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |         btree.insert(bufmgr, &skey, pkey);
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 86 |         let _ = btree.insert(bufmgr, &skey, pkey);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/btree/branch.rs:59:20
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn pair_at(&self, slot_id: usize) -> Pair {
[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] 59 |     pub fn pair_at(&self, slot_id: usize) -> Pair<'_> {
[INFO] [stdout]    |                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/btree/leaf.rs:54:20
[INFO] [stdout]    |
[INFO] [stdout] 54 |     pub fn pair_at(&self, slot_id: usize) -> Pair {
[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] 54 |     pub fn pair_at(&self, slot_id: usize) -> Pair<'_> {
[INFO] [stdout]    |                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/query.rs:35:14
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor>;
[INFO] [stdout]    |              ^^^^^ the lifetime is elided here                ^^^^^^^^^^^ the same lifetime is hidden 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] 35 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor<'_>>;
[INFO] [stdout]    |                                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/query.rs:45:14
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor> {
[INFO] [stdout]    |              ^^^^^ the lifetime is elided here                ^^^^^^^^^^^ the same lifetime is hidden 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] 45 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor<'_>> {
[INFO] [stdout]    |                                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/query.rs:83:14
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor> {
[INFO] [stdout]    |              ^^^^^ the lifetime is elided here                ^^^^^^^^^^^ the same lifetime is hidden 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] 83 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor<'_>> {
[INFO] [stdout]    |                                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/query.rs:120:14
[INFO] [stdout]     |
[INFO] [stdout] 120 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor> {
[INFO] [stdout]     |              ^^^^^ the lifetime is elided here                ^^^^^^^^^^^ the same lifetime is hidden 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] 120 |     fn start(&self, bufmgr: &mut BufferPoolManager) -> Result<BoxExecutor<'_>> {
[INFO] [stdout]     |                                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/table.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |         btree.insert(bufmgr, &skey, pkey);
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 86 |         let _ = btree.insert(bufmgr, &skey, pkey);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     table.create(&mut bufmgr);
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let _ = table.create(&mut bufmgr);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     table.create(&mut bufmgr);
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let _ = table.create(&mut bufmgr);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find type `BTree` in this scope
[INFO] [stdout]   --> examples/btree-query.rs:11:17
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let btree = BTree::new(PageId(0));
[INFO] [stdout]    |                 ^^^^^ use of undeclared type `BTree`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout]  1 + use rust_rdbms::btree::BTree;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find type `SearchMode` in this scope
[INFO] [stdout]   --> examples/btree-query.rs:12:46
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let mut iter = btree.search(&mut bufmgr, SearchMode::Key(b"Hyogo".to_vec()))?;
[INFO] [stdout]    |                                              ^^^^^^^^^^ use of undeclared type `SearchMode`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this enum
[INFO] [stdout]    |
[INFO] [stdout]  1 + use rust_rdbms::btree::SearchMode;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find type `BTree` in this scope
[INFO] [stdout]  --> examples/btree-create.rs:9:17
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let btree = BTree::create(&mut bufmgr)?;
[INFO] [stdout]   |                 ^^^^^ use of undeclared type `BTree`
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 1 + use rust_rdbms::btree::BTree;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-rdbms` (example "btree-query") due to 2 previous errors
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `()`
[INFO] [stdout]  --> examples/btree-create.rs:5:45
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() -> Result<(), ()> {
[INFO] [stdout]   |              -------------- expected `()` because of this
[INFO] [stdout] 5 |     let disk = DiskManager::open("test.btr")?;
[INFO] [stdout]   |                -----------------------------^ the trait `From<std::io::Error>` is not implemented for `()`
[INFO] [stdout]   |                |
[INFO] [stdout]   |                this can't be annotated with `?` because it has type `Result<_, std::io::Error>`
[INFO] [stdout]   |
[INFO] [stdout]   = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout]   = help: the following other types implement trait `From<T>`:
[INFO] [stdout]             `(T,)` implements `From<[T; 1]>`
[INFO] [stdout]             `(T, T)` implements `From<[T; 2]>`
[INFO] [stdout]             `(T, T, T)` implements `From<[T; 3]>`
[INFO] [stdout]             `(T, T, T, T)` implements `From<[T; 4]>`
[INFO] [stdout]             `(T, T, T, T, T)` implements `From<[T; 5]>`
[INFO] [stdout]             `(T, T, T, T, T, T)` implements `From<[T; 6]>`
[INFO] [stdout]             `(T, T, T, T, T, T, T)` implements `From<[T; 7]>`
[INFO] [stdout]             `(T, T, T, T, T, T, T, T)` implements `From<[T; 8]>`
[INFO] [stdout]           and 4 others
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `()`
[INFO] [stdout]   --> examples/btree-create.rs:18:19
[INFO] [stdout]    |
[INFO] [stdout]  4 | fn main() -> Result<(), ()> {
[INFO] [stdout]    |              -------------- expected `()` because of this
[INFO] [stdout] ...
[INFO] [stdout] 18 |     bufmgr.flush()?;
[INFO] [stdout]    |            -------^ the trait `From<rust_rdbms::buffer::Error>` is not implemented for `()`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this can't be annotated with `?` because it has type `Result<_, rust_rdbms::buffer::Error>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout]    = help: the following other types implement trait `From<T>`:
[INFO] [stdout]              `(T,)` implements `From<[T; 1]>`
[INFO] [stdout]              `(T, T)` implements `From<[T; 2]>`
[INFO] [stdout]              `(T, T, T)` implements `From<[T; 3]>`
[INFO] [stdout]              `(T, T, T, T)` implements `From<[T; 4]>`
[INFO] [stdout]              `(T, T, T, T, T)` implements `From<[T; 5]>`
[INFO] [stdout]              `(T, T, T, T, T, T)` implements `From<[T; 6]>`
[INFO] [stdout]              `(T, T, T, T, T, T, T)` implements `From<[T; 7]>`
[INFO] [stdout]              `(T, T, T, T, T, T, T, T)` implements `From<[T; 8]>`
[INFO] [stdout]            and 4 others
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-rdbms` (example "btree-create") due to 3 previous errors
[INFO] [stdout] Some errors have detailed explanations: E0277, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "be144544597281d987410f27b5a971a567c6caaf8754cfaa901c1bde218e5fbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be144544597281d987410f27b5a971a567c6caaf8754cfaa901c1bde218e5fbc", kill_on_drop: false }`
[INFO] [stdout] be144544597281d987410f27b5a971a567c6caaf8754cfaa901c1bde218e5fbc
