[INFO] fetching crate cow_hashbrown 0.14.21...
[INFO] checking cow_hashbrown-0.14.21 against master#3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777 for pr-132289
[INFO] extracting crate cow_hashbrown 0.14.21 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate cow_hashbrown 0.14.21 on toolchain 3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cow_hashbrown 0.14.21
[INFO] finished tweaking crates.io crate cow_hashbrown 0.14.21
[INFO] tweaked toml for crates.io crate cow_hashbrown 0.14.21 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 72 packages to latest compatible versions
[INFO] [stderr]       Adding rkyv v0.7.45 (available: v0.8.8)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "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 rustc-std-workspace-core v1.0.0
[INFO] [stderr]   Downloaded rustc-std-workspace-alloc v1.0.0
[INFO] [stderr]   Downloaded arc-swap-for-cow v1.7.1
[INFO] [stderr]   Downloaded compiler_builtins v0.1.136
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a937a6c03a660fa453a59b96231103f88c2b5247bafcfd0d85e8f2b05b5f9324
[INFO] running `Command { std: "docker" "start" "-a" "a937a6c03a660fa453a59b96231103f88c2b5247bafcfd0d85e8f2b05b5f9324", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a937a6c03a660fa453a59b96231103f88c2b5247bafcfd0d85e8f2b05b5f9324", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a937a6c03a660fa453a59b96231103f88c2b5247bafcfd0d85e8f2b05b5f9324", kill_on_drop: false }`
[INFO] [stdout] a937a6c03a660fa453a59b96231103f88c2b5247bafcfd0d85e8f2b05b5f9324
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a03a3e758f35ba72b36ffb803b6ae8ed35539dbd2a9c2b0c0c2d068fe678a255
[INFO] running `Command { std: "docker" "start" "-a" "a03a3e758f35ba72b36ffb803b6ae8ed35539dbd2a9c2b0c0c2d068fe678a255", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]     Checking once_cell v1.20.2
[INFO] [stderr]    Compiling bytecheck v0.6.12
[INFO] [stderr]     Checking simdutf8 v0.1.5
[INFO] [stderr]    Compiling rend v0.4.2
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]     Checking allocator-api2 v0.2.18
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling rkyv v0.7.45
[INFO] [stderr]    Compiling ahash v0.7.8
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]     Checking either v1.13.0
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]    Compiling ptr_meta_derive v0.1.4
[INFO] [stderr]    Compiling bytecheck_derive v0.6.12
[INFO] [stderr]    Compiling rkyv_derive v0.7.45
[INFO] [stderr]     Checking self_cell v1.0.4
[INFO] [stderr]     Checking seahash v4.1.0
[INFO] [stderr]     Checking arc-swap-for-cow v1.7.1
[INFO] [stderr]     Checking serde_test v1.0.177
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking bumpalo v3.16.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking cow_hashbrown v0.14.21 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking ptr_meta v0.1.4
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stdout] error[E0432]: unresolved import `cow_hashbrown::HashSet`
[INFO] [stdout]   --> benches/bench.rs:12:33
[INFO] [stdout]    |
[INFO] [stdout] 12 | use cow_hashbrown::{CowHashMap, HashSet};
[INFO] [stdout]    |                                 ^^^^^^^ no `HashSet` in the root
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider importing this struct instead:
[INFO] [stdout]            std::collections::HashSet
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> benches/insert_unique_unchecked.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let mut m = CowHashMap::with_capacity(1000);
[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: variable does not need to be mutable
[INFO] [stdout]   --> benches/insert_unique_unchecked.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let mut m = CowHashMap::with_capacity(1000);
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `cow_hashbrown::HashSet`
[INFO] [stdout]   --> benches/set_ops.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use cow_hashbrown::HashSet;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^ no `HashSet` in the root
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct instead
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::collections::HashSet;
[INFO] [stdout]    |     ~~~~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cow_hashbrown` (bench "set_ops") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:143:21
[INFO] [stdout]     |
[INFO] [stdout] 143 |                   let mut m = base.clone();
[INFO] [stdout]     |                       ----^
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 159 | / bench_suite!(
[INFO] [stdout] 160 | |     bench_insert_erase,
[INFO] [stdout] 161 | |     insert_erase_ahash_serial,
[INFO] [stdout] 162 | |     insert_erase_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 166 | |     insert_erase_std_random
[INFO] [stdout] 167 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `bench_insert_erase` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:137:17
[INFO] [stdout]     |
[INFO] [stdout] 137 |               let mut base = $maptype::default();
[INFO] [stdout]     |                   ----^^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 159 | / bench_suite!(
[INFO] [stdout] 160 | |     bench_insert_erase,
[INFO] [stdout] 161 | |     insert_erase_ahash_serial,
[INFO] [stdout] 162 | |     insert_erase_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 166 | |     insert_erase_std_random
[INFO] [stdout] 167 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_insert_erase` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:143:21
[INFO] [stdout]     |
[INFO] [stdout] 143 |                   let mut m = base.clone();
[INFO] [stdout]     |                       ----^
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 159 | / bench_suite!(
[INFO] [stdout] 160 | |     bench_insert_erase,
[INFO] [stdout] 161 | |     insert_erase_ahash_serial,
[INFO] [stdout] 162 | |     insert_erase_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 166 | |     insert_erase_std_random
[INFO] [stdout] 167 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_insert_erase` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:137:17
[INFO] [stdout]     |
[INFO] [stdout] 137 |               let mut base = $maptype::default();
[INFO] [stdout]     |                   ----^^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 159 | / bench_suite!(
[INFO] [stdout] 160 | |     bench_insert_erase,
[INFO] [stdout] 161 | |     insert_erase_ahash_serial,
[INFO] [stdout] 162 | |     insert_erase_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 166 | |     insert_erase_std_random
[INFO] [stdout] 167 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_insert_erase` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:143:21
[INFO] [stdout]     |
[INFO] [stdout] 143 |                   let mut m = base.clone();
[INFO] [stdout]     |                       ----^
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 159 | / bench_suite!(
[INFO] [stdout] 160 | |     bench_insert_erase,
[INFO] [stdout] 161 | |     insert_erase_ahash_serial,
[INFO] [stdout] 162 | |     insert_erase_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 166 | |     insert_erase_std_random
[INFO] [stdout] 167 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_insert_erase` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:137:17
[INFO] [stdout]     |
[INFO] [stdout] 137 |               let mut base = $maptype::default();
[INFO] [stdout]     |                   ----^^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 159 | / bench_suite!(
[INFO] [stdout] 160 | |     bench_insert_erase,
[INFO] [stdout] 161 | |     insert_erase_ahash_serial,
[INFO] [stdout] 162 | |     insert_erase_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 166 | |     insert_erase_std_random
[INFO] [stdout] 167 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_insert_erase` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:143:21
[INFO] [stdout]     |
[INFO] [stdout] 143 |                   let mut m = base.clone();
[INFO] [stdout]     |                       ----^
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 159 | / bench_suite!(
[INFO] [stdout] 160 | |     bench_insert_erase,
[INFO] [stdout] 161 | |     insert_erase_ahash_serial,
[INFO] [stdout] 162 | |     insert_erase_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 166 | |     insert_erase_std_random
[INFO] [stdout] 167 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_insert_erase` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:137:17
[INFO] [stdout]     |
[INFO] [stdout] 137 |               let mut base = $maptype::default();
[INFO] [stdout]     |                   ----^^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 159 | / bench_suite!(
[INFO] [stdout] 160 | |     bench_insert_erase,
[INFO] [stdout] 161 | |     insert_erase_ahash_serial,
[INFO] [stdout] 162 | |     insert_erase_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 166 | |     insert_erase_std_random
[INFO] [stdout] 167 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_insert_erase` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:143:21
[INFO] [stdout]     |
[INFO] [stdout] 143 |                   let mut m = base.clone();
[INFO] [stdout]     |                       ----^
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 159 | / bench_suite!(
[INFO] [stdout] 160 | |     bench_insert_erase,
[INFO] [stdout] 161 | |     insert_erase_ahash_serial,
[INFO] [stdout] 162 | |     insert_erase_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 166 | |     insert_erase_std_random
[INFO] [stdout] 167 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_insert_erase` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:137:17
[INFO] [stdout]     |
[INFO] [stdout] 137 |               let mut base = $maptype::default();
[INFO] [stdout]     |                   ----^^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 159 | / bench_suite!(
[INFO] [stdout] 160 | |     bench_insert_erase,
[INFO] [stdout] 161 | |     insert_erase_ahash_serial,
[INFO] [stdout] 162 | |     insert_erase_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 166 | |     insert_erase_std_random
[INFO] [stdout] 167 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_insert_erase` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:143:21
[INFO] [stdout]     |
[INFO] [stdout] 143 |                   let mut m = base.clone();
[INFO] [stdout]     |                       ----^
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 159 | / bench_suite!(
[INFO] [stdout] 160 | |     bench_insert_erase,
[INFO] [stdout] 161 | |     insert_erase_ahash_serial,
[INFO] [stdout] 162 | |     insert_erase_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 166 | |     insert_erase_std_random
[INFO] [stdout] 167 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_insert_erase` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:137:17
[INFO] [stdout]     |
[INFO] [stdout] 137 |               let mut base = $maptype::default();
[INFO] [stdout]     |                   ----^^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 159 | / bench_suite!(
[INFO] [stdout] 160 | |     bench_insert_erase,
[INFO] [stdout] 161 | |     insert_erase_ahash_serial,
[INFO] [stdout] 162 | |     insert_erase_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 166 | |     insert_erase_std_random
[INFO] [stdout] 167 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_insert_erase` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 188 | / bench_suite!(
[INFO] [stdout] 189 | |     bench_lookup,
[INFO] [stdout] 190 | |     lookup_ahash_serial,
[INFO] [stdout] 191 | |     lookup_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 195 | |     lookup_std_random
[INFO] [stdout] 196 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_lookup` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 188 | / bench_suite!(
[INFO] [stdout] 189 | |     bench_lookup,
[INFO] [stdout] 190 | |     lookup_ahash_serial,
[INFO] [stdout] 191 | |     lookup_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 195 | |     lookup_std_random
[INFO] [stdout] 196 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_lookup` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 188 | / bench_suite!(
[INFO] [stdout] 189 | |     bench_lookup,
[INFO] [stdout] 190 | |     lookup_ahash_serial,
[INFO] [stdout] 191 | |     lookup_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 195 | |     lookup_std_random
[INFO] [stdout] 196 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_lookup` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 188 | / bench_suite!(
[INFO] [stdout] 189 | |     bench_lookup,
[INFO] [stdout] 190 | |     lookup_ahash_serial,
[INFO] [stdout] 191 | |     lookup_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 195 | |     lookup_std_random
[INFO] [stdout] 196 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_lookup` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 188 | / bench_suite!(
[INFO] [stdout] 189 | |     bench_lookup,
[INFO] [stdout] 190 | |     lookup_ahash_serial,
[INFO] [stdout] 191 | |     lookup_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 195 | |     lookup_std_random
[INFO] [stdout] 196 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_lookup` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 188 | / bench_suite!(
[INFO] [stdout] 189 | |     bench_lookup,
[INFO] [stdout] 190 | |     lookup_ahash_serial,
[INFO] [stdout] 191 | |     lookup_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 195 | |     lookup_std_random
[INFO] [stdout] 196 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_lookup` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:202:17
[INFO] [stdout]     |
[INFO] [stdout] 202 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 217 | / bench_suite!(
[INFO] [stdout] 218 | |     bench_lookup_fail,
[INFO] [stdout] 219 | |     lookup_fail_ahash_serial,
[INFO] [stdout] 220 | |     lookup_fail_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 224 | |     lookup_fail_std_random
[INFO] [stdout] 225 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_lookup_fail` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:202:17
[INFO] [stdout]     |
[INFO] [stdout] 202 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 217 | / bench_suite!(
[INFO] [stdout] 218 | |     bench_lookup_fail,
[INFO] [stdout] 219 | |     lookup_fail_ahash_serial,
[INFO] [stdout] 220 | |     lookup_fail_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 224 | |     lookup_fail_std_random
[INFO] [stdout] 225 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_lookup_fail` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:202:17
[INFO] [stdout]     |
[INFO] [stdout] 202 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 217 | / bench_suite!(
[INFO] [stdout] 218 | |     bench_lookup_fail,
[INFO] [stdout] 219 | |     lookup_fail_ahash_serial,
[INFO] [stdout] 220 | |     lookup_fail_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 224 | |     lookup_fail_std_random
[INFO] [stdout] 225 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_lookup_fail` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:202:17
[INFO] [stdout]     |
[INFO] [stdout] 202 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 217 | / bench_suite!(
[INFO] [stdout] 218 | |     bench_lookup_fail,
[INFO] [stdout] 219 | |     lookup_fail_ahash_serial,
[INFO] [stdout] 220 | |     lookup_fail_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 224 | |     lookup_fail_std_random
[INFO] [stdout] 225 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_lookup_fail` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:202:17
[INFO] [stdout]     |
[INFO] [stdout] 202 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 217 | / bench_suite!(
[INFO] [stdout] 218 | |     bench_lookup_fail,
[INFO] [stdout] 219 | |     lookup_fail_ahash_serial,
[INFO] [stdout] 220 | |     lookup_fail_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 224 | |     lookup_fail_std_random
[INFO] [stdout] 225 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_lookup_fail` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:202:17
[INFO] [stdout]     |
[INFO] [stdout] 202 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 217 | / bench_suite!(
[INFO] [stdout] 218 | |     bench_lookup_fail,
[INFO] [stdout] 219 | |     lookup_fail_ahash_serial,
[INFO] [stdout] 220 | |     lookup_fail_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 224 | |     lookup_fail_std_random
[INFO] [stdout] 225 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_lookup_fail` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:231:17
[INFO] [stdout]     |
[INFO] [stdout] 231 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 245 | / bench_suite!(
[INFO] [stdout] 246 | |     bench_iter,
[INFO] [stdout] 247 | |     iter_ahash_serial,
[INFO] [stdout] 248 | |     iter_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 252 | |     iter_std_random
[INFO] [stdout] 253 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_iter` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:231:17
[INFO] [stdout]     |
[INFO] [stdout] 231 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 245 | / bench_suite!(
[INFO] [stdout] 246 | |     bench_iter,
[INFO] [stdout] 247 | |     iter_ahash_serial,
[INFO] [stdout] 248 | |     iter_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 252 | |     iter_std_random
[INFO] [stdout] 253 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_iter` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:231:17
[INFO] [stdout]     |
[INFO] [stdout] 231 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 245 | / bench_suite!(
[INFO] [stdout] 246 | |     bench_iter,
[INFO] [stdout] 247 | |     iter_ahash_serial,
[INFO] [stdout] 248 | |     iter_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 252 | |     iter_std_random
[INFO] [stdout] 253 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_iter` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:231:17
[INFO] [stdout]     |
[INFO] [stdout] 231 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 245 | / bench_suite!(
[INFO] [stdout] 246 | |     bench_iter,
[INFO] [stdout] 247 | |     iter_ahash_serial,
[INFO] [stdout] 248 | |     iter_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 252 | |     iter_std_random
[INFO] [stdout] 253 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_iter` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:231:17
[INFO] [stdout]     |
[INFO] [stdout] 231 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 245 | / bench_suite!(
[INFO] [stdout] 246 | |     bench_iter,
[INFO] [stdout] 247 | |     iter_ahash_serial,
[INFO] [stdout] 248 | |     iter_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 252 | |     iter_std_random
[INFO] [stdout] 253 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_iter` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:231:17
[INFO] [stdout]     |
[INFO] [stdout] 231 |               let mut m = $maptype::default();
[INFO] [stdout]     |                   ----^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 245 | / bench_suite!(
[INFO] [stdout] 246 | |     bench_iter,
[INFO] [stdout] 247 | |     iter_ahash_serial,
[INFO] [stdout] 248 | |     iter_std_serial,
[INFO] [stdout] ...   |
[INFO] [stdout] 252 | |     iter_std_random
[INFO] [stdout] 253 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bench_iter` which comes from the expansion of the macro `bench_suite` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> benches/bench.rs:257:9
[INFO] [stdout]     |
[INFO] [stdout] 257 |     let mut m = CowHashMap::new();
[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]    --> benches/bench.rs:269:9
[INFO] [stdout]     |
[INFO] [stdout] 269 |     let mut m = CowHashMap::new();
[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]    --> benches/bench.rs:283:9
[INFO] [stdout]     |
[INFO] [stdout] 283 |     let mut m = CowHashMap::new();
[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]    --> benches/bench.rs:295:9
[INFO] [stdout]     |
[INFO] [stdout] 295 |     let mut m = CowHashMap::new();
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cow_hashbrown` (bench "bench") due to 1 previous error; 34 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "a03a3e758f35ba72b36ffb803b6ae8ed35539dbd2a9c2b0c0c2d068fe678a255", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a03a3e758f35ba72b36ffb803b6ae8ed35539dbd2a9c2b0c0c2d068fe678a255", kill_on_drop: false }`
[INFO] [stdout] a03a3e758f35ba72b36ffb803b6ae8ed35539dbd2a9c2b0c0c2d068fe678a255
