[INFO] cloning repository https://github.com/uuhan/cloyster
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/uuhan/cloyster" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuuhan%2Fcloyster", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuuhan%2Fcloyster'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4d3cab5ba1dd4ceca79fd586a1851c9f6e0ba30a
[INFO] testing uuhan/cloyster against beta-2023-04-20 for beta-1.70-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuuhan%2Fcloyster" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/uuhan/cloyster on toolchain beta-2023-04-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/uuhan/cloyster
[INFO] finished tweaking git repo https://github.com/uuhan/cloyster
[INFO] tweaked toml for git repo https://github.com/uuhan/cloyster written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/uuhan/cloyster 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" "+beta-2023-04-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded binary-heap-plus v0.4.1
[INFO] [stderr]   Downloaded compare v0.1.0
[INFO] [stderr]   Downloaded abyss-promise v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cfd9f0dcdbd97a61d5c89dacd5df7a069ce9e32f3e31bd846d30d455175041f2
[INFO] running `Command { std: "docker" "start" "-a" "cfd9f0dcdbd97a61d5c89dacd5df7a069ce9e32f3e31bd846d30d455175041f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cfd9f0dcdbd97a61d5c89dacd5df7a069ce9e32f3e31bd846d30d455175041f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cfd9f0dcdbd97a61d5c89dacd5df7a069ce9e32f3e31bd846d30d455175041f2", kill_on_drop: false }`
[INFO] [stdout] cfd9f0dcdbd97a61d5c89dacd5df7a069ce9e32f3e31bd846d30d455175041f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d7313227df384ae4bbb4f3db8f76c83031b6133624d7c29bb1ce383f00c3fee9
[INFO] running `Command { std: "docker" "start" "-a" "d7313227df384ae4bbb4f3db8f76c83031b6133624d7c29bb1ce383f00c3fee9", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling syn v1.0.84
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling serde_derive v1.0.133
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling serde v1.0.133
[INFO] [stderr]    Compiling smallvec v1.7.0
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling instant v0.1.12
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling lock_api v0.4.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling crc32fast v1.3.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling once_cell v1.9.0
[INFO] [stderr]    Compiling arrayvec v0.7.2
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling im v15.0.0
[INFO] [stderr]    Compiling rand_xoshiro v0.4.0
[INFO] [stderr]    Compiling constant_time_eq v0.1.5
[INFO] [stderr]    Compiling compare v0.1.0
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling arrayref v0.3.6
[INFO] [stderr]    Compiling binary-heap-plus v0.4.1
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling blake3 v1.2.0
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling abyss-promise v0.1.1
[INFO] [stderr]    Compiling bitmaps v2.1.0
[INFO] [stderr]    Compiling digest v0.9.0
[INFO] [stderr]    Compiling sized-chunks v0.6.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling cloyster v0.1.0-alpha.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicU64::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/pagecache/iobuf.rs:861:31
[INFO] [stdout]     |
[INFO] [stdout] 861 |         let res = self.header.compare_and_swap(old, new, SeqCst);
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]   --> src/ds/dll.rs:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |         let node = Node::new(item);
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `remove` are never used
[INFO] [stdout]   --> src/ds/dll.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<Item> Node<Item> {
[INFO] [stdout]    | --------------------- associated items in this implementation
[INFO] [stdout] 11 |     pub fn new(item: Item) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn remove(&mut self) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `push_head`, `push_tail`, and `len` are never used
[INFO] [stdout]   --> src/ds/dll.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl<Item> DoublyLinkedList<Item> {
[INFO] [stdout]    | --------------------------------- methods in this implementation
[INFO] [stdout] 57 |     pub fn push_head(&mut self, item: Item) -> *mut Node<Item> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     pub fn push_tail(&mut self, item: Item) -> *mut Node<Item> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `CasResult` is never used
[INFO] [stdout]  --> src/ds/stack.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | type CasResult<'g, T> = Either<Shared<'g, Node<T>>, (Shared<'g, Node<T>>, Owned<Node<T>>)>;
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `head`, `push`, `cas`, and `cap` are never used
[INFO] [stdout]    --> src/ds/stack.rs:68:12
[INFO] [stdout]     |
[INFO] [stdout] 66  | impl<T: Clone + Send + Sync + 'static> Stack<T> {
[INFO] [stdout]     | ----------------------------------------------- methods in this implementation
[INFO] [stdout] 67  |     /// return current head pointer of the stack
[INFO] [stdout] 68  |     pub fn head<'g>(&self, guard: &'g Guard) -> Shared<'g, Node<T>> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72  |     pub fn push(&self, inner: T) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 105 |     pub fn cas<'g>(
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 131 |     pub fn cap<'g>(
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `guard` is never read
[INFO] [stdout]   --> src/iter.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | pub struct Iter {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 13 |     guard: Guard,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `try_lock` are never used
[INFO] [stdout]   --> src/lock.rs:23:18
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl<T> FastLock<T> {
[INFO] [stdout]    | ------------------- associated items in this implementation
[INFO] [stdout] 22 |     #[cfg(not(loom))]
[INFO] [stdout] 23 |     pub const fn new(inner: T) -> FastLock<T> {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn try_lock(&self) -> Option<FastLockGuard<'_, T>> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `pop` is never used
[INFO] [stdout]    --> src/pagecache/ds/stack.rs:111:8
[INFO] [stdout]     |
[INFO] [stdout] 85  | impl<T: Clone + Send + Sync + 'static> Stack<T> {
[INFO] [stdout]     | ----------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 111 |     fn pop(&self, guard: &Guard) -> Option<T> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/pagecache/config.rs:403:9
[INFO] [stdout]     |
[INFO] [stdout] 403 |         buf.split_off(len - 4);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 403 |         let _ = buf.split_off(len - 4);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/pagecache/snapshot.rs:200:5
[INFO] [stdout]     |
[INFO] [stdout] 200 |     buf.split_off(len - 12);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 200 |     let _ = buf.split_off(len - 12);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.56s
[INFO] running `Command { std: "docker" "inspect" "d7313227df384ae4bbb4f3db8f76c83031b6133624d7c29bb1ce383f00c3fee9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7313227df384ae4bbb4f3db8f76c83031b6133624d7c29bb1ce383f00c3fee9", kill_on_drop: false }`
[INFO] [stdout] d7313227df384ae4bbb4f3db8f76c83031b6133624d7c29bb1ce383f00c3fee9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 29532ef104fdf78510c03cb7e78063ec524d8d3743dbe35bd2055f4bfcb61f09
[INFO] running `Command { std: "docker" "start" "-a" "29532ef104fdf78510c03cb7e78063ec524d8d3743dbe35bd2055f4bfcb61f09", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicU64::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/pagecache/iobuf.rs:861:31
[INFO] [stdout]     |
[INFO] [stdout] 861 |         let res = self.header.compare_and_swap(old, new, SeqCst);
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]   --> src/ds/dll.rs:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |         let node = Node::new(item);
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `remove` are never used
[INFO] [stdout]   --> src/ds/dll.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<Item> Node<Item> {
[INFO] [stdout]    | --------------------- associated items in this implementation
[INFO] [stdout] 11 |     pub fn new(item: Item) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn remove(&mut self) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `push_head`, `push_tail`, and `len` are never used
[INFO] [stdout]   --> src/ds/dll.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl<Item> DoublyLinkedList<Item> {
[INFO] [stdout]    | --------------------------------- methods in this implementation
[INFO] [stdout] 57 |     pub fn push_head(&mut self, item: Item) -> *mut Node<Item> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     pub fn push_tail(&mut self, item: Item) -> *mut Node<Item> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `CasResult` is never used
[INFO] [stdout]  --> src/ds/stack.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | type CasResult<'g, T> = Either<Shared<'g, Node<T>>, (Shared<'g, Node<T>>, Owned<Node<T>>)>;
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `head`, `push`, `cas`, and `cap` are never used
[INFO] [stdout]    --> src/ds/stack.rs:68:12
[INFO] [stdout]     |
[INFO] [stdout] 66  | impl<T: Clone + Send + Sync + 'static> Stack<T> {
[INFO] [stdout]     | ----------------------------------------------- methods in this implementation
[INFO] [stdout] 67  |     /// return current head pointer of the stack
[INFO] [stdout] 68  |     pub fn head<'g>(&self, guard: &'g Guard) -> Shared<'g, Node<T>> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72  |     pub fn push(&self, inner: T) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 105 |     pub fn cas<'g>(
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 131 |     pub fn cap<'g>(
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `guard` is never read
[INFO] [stdout]   --> src/iter.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | pub struct Iter {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 13 |     guard: Guard,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `try_lock` are never used
[INFO] [stdout]   --> src/lock.rs:23:18
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl<T> FastLock<T> {
[INFO] [stdout]    | ------------------- associated items in this implementation
[INFO] [stdout] 22 |     #[cfg(not(loom))]
[INFO] [stdout] 23 |     pub const fn new(inner: T) -> FastLock<T> {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn try_lock(&self) -> Option<FastLockGuard<'_, T>> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `pop` is never used
[INFO] [stdout]    --> src/pagecache/ds/stack.rs:111:8
[INFO] [stdout]     |
[INFO] [stdout] 85  | impl<T: Clone + Send + Sync + 'static> Stack<T> {
[INFO] [stdout]     | ----------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 111 |     fn pop(&self, guard: &Guard) -> Option<T> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/pagecache/config.rs:403:9
[INFO] [stdout]     |
[INFO] [stdout] 403 |         buf.split_off(len - 4);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 403 |         let _ = buf.split_off(len - 4);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/pagecache/snapshot.rs:200:5
[INFO] [stdout]     |
[INFO] [stdout] 200 |     buf.split_off(len - 12);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 200 |     let _ = buf.split_off(len - 12);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling env_logger v0.9.0
[INFO] [stderr]    Compiling cloyster v0.1.0-alpha.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Config`
[INFO] [stdout]  --> examples/demo.rs:1:38
[INFO] [stdout]   |
[INFO] [stdout] 1 | use cloyster::pagecache::{self, pin, Config, Materializer};
[INFO] [stdout]   |                                      ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `key` is never read
[INFO] [stdout]   --> examples/demo.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |         key = pc
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> examples/demo.rs:49:18
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let (mut key, page, size_on_disk) = pc.get(id, &guard).unwrap().unwrap();
[INFO] [stdout]    |                  ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size_on_disk`
[INFO] [stdout]   --> examples/demo.rs:49:29
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let (mut key, page, size_on_disk) = pc.get(id, &guard).unwrap().unwrap();
[INFO] [stdout]    |                             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_size_on_disk`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/demo.rs:49:14
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let (mut key, page, size_on_disk) = pc.get(id, &guard).unwrap().unwrap();
[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: use of deprecated method `std::sync::atomic::AtomicU64::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/pagecache/iobuf.rs:861:31
[INFO] [stdout]     |
[INFO] [stdout] 861 |         let res = self.header.compare_and_swap(old, new, SeqCst);
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]   --> src/ds/dll.rs:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |         let node = Node::new(item);
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `remove` are never used
[INFO] [stdout]   --> src/ds/dll.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<Item> Node<Item> {
[INFO] [stdout]    | --------------------- associated items in this implementation
[INFO] [stdout] 11 |     pub fn new(item: Item) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn remove(&mut self) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `push_head`, `push_tail`, and `len` are never used
[INFO] [stdout]   --> src/ds/dll.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl<Item> DoublyLinkedList<Item> {
[INFO] [stdout]    | --------------------------------- methods in this implementation
[INFO] [stdout] 57 |     pub fn push_head(&mut self, item: Item) -> *mut Node<Item> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     pub fn push_tail(&mut self, item: Item) -> *mut Node<Item> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `CasResult` is never used
[INFO] [stdout]  --> src/ds/stack.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | type CasResult<'g, T> = Either<Shared<'g, Node<T>>, (Shared<'g, Node<T>>, Owned<Node<T>>)>;
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `head`, `push`, `cas`, and `cap` are never used
[INFO] [stdout]    --> src/ds/stack.rs:68:12
[INFO] [stdout]     |
[INFO] [stdout] 66  | impl<T: Clone + Send + Sync + 'static> Stack<T> {
[INFO] [stdout]     | ----------------------------------------------- methods in this implementation
[INFO] [stdout] 67  |     /// return current head pointer of the stack
[INFO] [stdout] 68  |     pub fn head<'g>(&self, guard: &'g Guard) -> Shared<'g, Node<T>> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72  |     pub fn push(&self, inner: T) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 105 |     pub fn cas<'g>(
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 131 |     pub fn cap<'g>(
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `guard` is never read
[INFO] [stdout]   --> src/iter.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | pub struct Iter {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 13 |     guard: Guard,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `try_lock` are never used
[INFO] [stdout]   --> src/lock.rs:23:18
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl<T> FastLock<T> {
[INFO] [stdout]    | ------------------- associated items in this implementation
[INFO] [stdout] 22 |     #[cfg(not(loom))]
[INFO] [stdout] 23 |     pub const fn new(inner: T) -> FastLock<T> {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn try_lock(&self) -> Option<FastLockGuard<'_, T>> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/pagecache/config.rs:403:9
[INFO] [stdout]     |
[INFO] [stdout] 403 |         buf.split_off(len - 4);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 403 |         let _ = buf.split_off(len - 4);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/pagecache/snapshot.rs:200:5
[INFO] [stdout]     |
[INFO] [stdout] 200 |     buf.split_off(len - 12);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 200 |     let _ = buf.split_off(len - 12);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.94s
[INFO] running `Command { std: "docker" "inspect" "29532ef104fdf78510c03cb7e78063ec524d8d3743dbe35bd2055f4bfcb61f09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29532ef104fdf78510c03cb7e78063ec524d8d3743dbe35bd2055f4bfcb61f09", kill_on_drop: false }`
[INFO] [stdout] 29532ef104fdf78510c03cb7e78063ec524d8d3743dbe35bd2055f4bfcb61f09
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 805f39ee659ea7d7c6bf752d0a4698a034719d90364896d8b72138414982707a
[INFO] running `Command { std: "docker" "start" "-a" "805f39ee659ea7d7c6bf752d0a4698a034719d90364896d8b72138414982707a", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated method `std::sync::atomic::AtomicU64::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stderr]    --> src/pagecache/iobuf.rs:861:31
[INFO] [stderr]     |
[INFO] [stderr] 861 |         let res = self.header.compare_and_swap(old, new, SeqCst);
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `node`
[INFO] [stderr]   --> src/ds/dll.rs:70:13
[INFO] [stderr]    |
[INFO] [stderr] 70 |         let node = Node::new(item);
[INFO] [stderr]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `remove` are never used
[INFO] [stderr]   --> src/ds/dll.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 10 | impl<Item> Node<Item> {
[INFO] [stderr]    | --------------------- associated items in this implementation
[INFO] [stderr] 11 |     pub fn new(item: Item) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 19 |     pub fn remove(&mut self) {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: methods `push_head`, `push_tail`, and `len` are never used
[INFO] [stderr]   --> src/ds/dll.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 56 | impl<Item> DoublyLinkedList<Item> {
[INFO] [stderr]    | --------------------------------- methods in this implementation
[INFO] [stderr] 57 |     pub fn push_head(&mut self, item: Item) -> *mut Node<Item> {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 68 |     pub fn push_tail(&mut self, item: Item) -> *mut Node<Item> {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 75 |     pub fn len(&self) -> usize {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `CasResult` is never used
[INFO] [stderr]  --> src/ds/stack.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 | type CasResult<'g, T> = Either<Shared<'g, Node<T>>, (Shared<'g, Node<T>>, Owned<Node<T>>)>;
[INFO] [stderr]   |      ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `head`, `push`, `cas`, and `cap` are never used
[INFO] [stderr]    --> src/ds/stack.rs:68:12
[INFO] [stderr]     |
[INFO] [stderr] 66  | impl<T: Clone + Send + Sync + 'static> Stack<T> {
[INFO] [stderr]     | ----------------------------------------------- methods in this implementation
[INFO] [stderr] 67  |     /// return current head pointer of the stack
[INFO] [stderr] 68  |     pub fn head<'g>(&self, guard: &'g Guard) -> Shared<'g, Node<T>> {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 72  |     pub fn push(&self, inner: T) {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 105 |     pub fn cas<'g>(
[INFO] [stderr]     |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 131 |     pub fn cap<'g>(
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `guard` is never read
[INFO] [stderr]   --> src/iter.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 7  | pub struct Iter {
[INFO] [stderr]    |            ---- field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 13 |     guard: Guard,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `try_lock` are never used
[INFO] [stderr]   --> src/lock.rs:23:18
[INFO] [stderr]    |
[INFO] [stderr] 21 | impl<T> FastLock<T> {
[INFO] [stderr]    | ------------------- associated items in this implementation
[INFO] [stderr] 22 |     #[cfg(not(loom))]
[INFO] [stderr] 23 |     pub const fn new(inner: T) -> FastLock<T> {
[INFO] [stderr]    |                  ^^^
[INFO] [stderr] ...
[INFO] [stderr] 38 |     pub fn try_lock(&self) -> Option<FastLockGuard<'_, T>> {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `pop` is never used
[INFO] [stderr]    --> src/pagecache/ds/stack.rs:111:8
[INFO] [stderr]     |
[INFO] [stderr] 85  | impl<T: Clone + Send + Sync + 'static> Stack<T> {
[INFO] [stderr]     | ----------------------------------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 111 |     fn pop(&self, guard: &Guard) -> Option<T> {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stderr]    --> src/pagecache/config.rs:403:9
[INFO] [stderr]     |
[INFO] [stderr] 403 |         buf.split_off(len - 4);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `.truncate()` if you don't need the other half
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 403 |         let _ = buf.split_off(len - 4);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stderr]    --> src/pagecache/snapshot.rs:200:5
[INFO] [stderr]     |
[INFO] [stderr] 200 |     buf.split_off(len - 12);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `.truncate()` if you don't need the other half
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 200 |     let _ = buf.split_off(len - 12);
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `cloyster` (lib) generated 11 warnings (run `cargo fix --lib -p cloyster` to apply 1 suggestion)
[INFO] [stderr] warning: `cloyster` (lib test) generated 10 warnings (10 duplicates)
[INFO] [stderr] warning: unused import: `Config`
[INFO] [stderr]  --> examples/demo.rs:1:38
[INFO] [stderr]   |
[INFO] [stderr] 1 | use cloyster::pagecache::{self, pin, Config, Materializer};
[INFO] [stderr]   |                                      ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `key` is never read
[INFO] [stderr]   --> examples/demo.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 |         key = pc
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> examples/demo.rs:49:18
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let (mut key, page, size_on_disk) = pc.get(id, &guard).unwrap().unwrap();
[INFO] [stderr]    |                  ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `size_on_disk`
[INFO] [stderr]   --> examples/demo.rs:49:29
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let (mut key, page, size_on_disk) = pc.get(id, &guard).unwrap().unwrap();
[INFO] [stderr]    |                             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_size_on_disk`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/demo.rs:49:14
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let (mut key, page, size_on_disk) = pc.get(id, &guard).unwrap().unwrap();
[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: `cloyster` (example "demo") generated 5 warnings (run `cargo fix --example "demo"` to apply 4 suggestions)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/cloyster-7c6ca6f87ec0e387)
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test pagecache::ds::dll::test_dll ... ok
[INFO] [stdout] test pagecache::ds::pagetable::test_split_fanout ... ok
[INFO] [stdout] test pagecache::ds::pagetable::basic_functionality ... ok
[INFO] [stdout] test pagecache::ds::stack::tests::basic_functionality ... ok
[INFO] [stdout] test tree::tests::test_block_persistence ... FAILED
[INFO] [stdout] test tree::tests::test_block_scan_prefix ... ok
[INFO] [stdout] test tree::tests::test_block_range ... ok
[INFO] [stdout] test tree::tests::test_block_insert_get ... ok
[INFO] [stdout] test tree::tests::test_open_block ... ok
[INFO] [stdout] test tree::tests::test_block_iter_count ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tree::tests::test_block_persistence stdout ----
[INFO] [stdout] thread 'tree::tests::test_block_persistence' panicked at 'open file at "./cloyster.db/db": IO error: Read-only file system (os error 30)', src/pagecache/config.rs:155:13
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x557f04610f0a - std::backtrace_rs::backtrace::libunwind::trace::h2f05d0192276a8f6
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stdout]    1:     0x557f04610f0a - std::backtrace_rs::backtrace::trace_unsynchronized::hedc23dff7a1af150
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x557f04610f0a - std::sys_common::backtrace::_print_fmt::h17541ef7592f3ce2
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stdout]    3:     0x557f04610f0a - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h20f75df5ab0c0792
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x557f046367ff - core::fmt::write::h78109e6f466b3af6
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/fmt/mod.rs:1254:17
[INFO] [stdout]    5:     0x557f0460da85 - std::io::Write::write_fmt::hd24bfb68a1b35a25
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/io/mod.rs:1698:15
[INFO] [stdout]    6:     0x557f04610cd5 - std::sys_common::backtrace::_print::h8dac57a9f8fbf9a5
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    7:     0x557f04610cd5 - std::sys_common::backtrace::print::hf9ecbf41d1aa712f
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    8:     0x557f0461298e - std::panicking::default_hook::{{closure}}::h04c07acfc84ca028
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:269:22
[INFO] [stdout]    9:     0x557f046126c1 - std::panicking::default_hook::h01f6bb23e1eceb2c
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:285:9
[INFO] [stdout]   10:     0x557f0455feab - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h87fe9f7b2fd49e4c
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   11:     0x557f0455feab - test::test_main::{{closure}}::he94d679243a7531b
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/test/src/lib.rs:134:21
[INFO] [stdout]   12:     0x557f04613074 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h3f2d6d8b14c4769f
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   13:     0x557f04613074 - std::panicking::rust_panic_with_hook::h2bb3722bbaf2f6df
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:695:13
[INFO] [stdout]   14:     0x557f04612de9 - std::panicking::begin_panic_handler::{{closure}}::h91bc7f36a4be011b
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:582:13
[INFO] [stdout]   15:     0x557f04611376 - std::sys_common::backtrace::__rust_end_short_backtrace::h8b3d3717114f9e59
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:150:18
[INFO] [stdout]   16:     0x557f04612b42 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:578:5
[INFO] [stdout]   17:     0x557f043ec7d3 - core::panicking::panic_fmt::hfd368e3fbdabea26
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/panicking.rs:67:14
[INFO] [stdout]   18:     0x557f0451f304 - cloyster::pagecache::config::ConfigBuilder::build::{{closure}}::hd2a19495044666b0
[INFO] [stdout]                                at /opt/rustwide/workdir/src/pagecache/config.rs:155:13
[INFO] [stdout]   19:     0x557f04446913 - core::result::Result<T,E>::unwrap_or_else::h862f9d97e1ed5f83
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/result.rs:1464:23
[INFO] [stdout]   20:     0x557f0451f08d - cloyster::pagecache::config::ConfigBuilder::build::h4ee962e9bf64f4b6
[INFO] [stdout]                                at /opt/rustwide/workdir/src/pagecache/config.rs:154:20
[INFO] [stdout]   21:     0x557f044e1146 - cloyster::context::Context::new::h189216056a2a5ac4
[INFO] [stdout]                                at /opt/rustwide/workdir/src/context.rs:27:13
[INFO] [stdout]   22:     0x557f044260d5 - cloyster::database::Database::open::hd7c56767b3af5d0b
[INFO] [stdout]                                at /opt/rustwide/workdir/src/database.rs:25:23
[INFO] [stdout]   23:     0x557f044e9ebe - cloyster::tree::tests::test_block_persistence::he7c8e19cadecf512
[INFO] [stdout]                                at /opt/rustwide/workdir/src/tree.rs:277:18
[INFO] [stdout]   24:     0x557f044e9e57 - cloyster::tree::tests::test_block_persistence::{{closure}}::h094574fdc78f48f0
[INFO] [stdout]                                at /opt/rustwide/workdir/src/tree.rs:276:33
[INFO] [stdout]   25:     0x557f04514015 - core::ops::function::FnOnce::call_once::hd705b8277478182e
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   26:     0x557f04564d7f - core::ops::function::FnOnce::call_once::ha6a70e79f7481a7e
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   27:     0x557f04564d7f - test::__rust_begin_short_backtrace::hce33033019b61e69
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/test/src/lib.rs:655:18
[INFO] [stdout]   28:     0x557f0453256c - test::run_test::{{closure}}::h858d3528838ae3e5
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/test/src/lib.rs:646:30
[INFO] [stdout]   29:     0x557f0453256c - core::ops::function::FnOnce::call_once{{vtable.shim}}::he8ac2b00f01ae79e
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   30:     0x557f04563e56 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h8093d25b522725ef
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/alloc/src/boxed.rs:1973:9
[INFO] [stdout]   31:     0x557f04563e56 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h5c334c204e4a3913
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   32:     0x557f04563e56 - std::panicking::try::do_call::ha8b740c7b9478074
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:485:40
[INFO] [stdout]   33:     0x557f04563e56 - std::panicking::try::h5d34f63d0e41b64e
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:449:19
[INFO] [stdout]   34:     0x557f04563e56 - std::panic::catch_unwind::hcfbb511e1aa7fc67
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panic.rs:140:14
[INFO] [stdout]   35:     0x557f04563e56 - test::run_test_in_process::h9abda90f802eaf21
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/test/src/lib.rs:678:27
[INFO] [stdout]   36:     0x557f04563e56 - test::run_test::run_test_inner::{{closure}}::h0f058de91f6c6edf
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/test/src/lib.rs:572:39
[INFO] [stdout]   37:     0x557f0452cd75 - test::run_test::run_test_inner::{{closure}}::h5ca48a4c59c6c1fb
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/test/src/lib.rs:599:37
[INFO] [stdout]   38:     0x557f0452cd75 - std::sys_common::backtrace::__rust_begin_short_backtrace::h32bd51e1495d4a33
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:134:18
[INFO] [stdout]   39:     0x557f045322b1 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hc086fae9b128b2db
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/thread/mod.rs:526:17
[INFO] [stdout]   40:     0x557f045322b1 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hb66571888d270d43
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   41:     0x557f045322b1 - std::panicking::try::do_call::h4fa2ef4f6e51fecf
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:485:40
[INFO] [stdout]   42:     0x557f045322b1 - std::panicking::try::h1e9e22b8584489b5
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:449:19
[INFO] [stdout]   43:     0x557f045322b1 - std::panic::catch_unwind::h44698a3de0e0769e
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panic.rs:140:14
[INFO] [stdout]   44:     0x557f045322b1 - std::thread::Builder::spawn_unchecked_::{{closure}}::h50153abde3fe239e
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/thread/mod.rs:525:30
[INFO] [stdout]   45:     0x557f045322b1 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hbe5bbf6f38394364
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   46:     0x557f046185b5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h0d83cb2920a49046
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/alloc/src/boxed.rs:1973:9
[INFO] [stdout]   47:     0x557f046185b5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hbe0a008aa7d9ef59
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/alloc/src/boxed.rs:1973:9
[INFO] [stdout]   48:     0x557f046185b5 - std::sys::unix::thread::Thread::new::thread_start::h3a466996bdf6b1f9
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   49:     0x7ff852099b43 - <unknown>
[INFO] [stdout]   50:     0x7ff85212abb4 - __clone
[INFO] [stdout]   51:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tree::tests::test_block_persistence
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 9 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.10s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "805f39ee659ea7d7c6bf752d0a4698a034719d90364896d8b72138414982707a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "805f39ee659ea7d7c6bf752d0a4698a034719d90364896d8b72138414982707a", kill_on_drop: false }`
[INFO] [stdout] 805f39ee659ea7d7c6bf752d0a4698a034719d90364896d8b72138414982707a
