[INFO] updating cached repository https://github.com/imhassane/thread_rust_multiplier
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 681ed6d5142d27b2258c2a43643be9b218b5ebb9
[INFO] testing imhassane/thread_rust_multiplier against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimhassane%2Fthread_rust_multiplier" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/imhassane/thread_rust_multiplier on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/imhassane/thread_rust_multiplier
[INFO] finished tweaking git repo https://github.com/imhassane/thread_rust_multiplier
[INFO] tweaked toml for git repo https://github.com/imhassane/thread_rust_multiplier written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/imhassane/thread_rust_multiplier already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ea7b3e1eb37b557fbe21bd27d8ea2b4d97b04989eeebcc312ef995bd3ad2350b
[INFO] running `"docker" "start" "-a" "ea7b3e1eb37b557fbe21bd27d8ea2b4d97b04989eeebcc312ef995bd3ad2350b"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling rev1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |         let mut prod = lock.lock().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: unused `std::sync::MutexGuard` that must be used
[INFO] [stderr]   --> src/main.rs:68:17
[INFO] [stderr]    |
[INFO] [stderr] 68 |                 cvar.wait(prod).unwrap();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if unused the Mutex will immediately unlock
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::sync::MutexGuard` that must be used
[INFO] [stderr]   --> src/main.rs:82:17
[INFO] [stderr]    |
[INFO] [stderr] 82 |                 cvar.wait(prod).unwrap();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if unused the Mutex will immediately unlock
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.83s
[INFO] running `"docker" "inspect" "ea7b3e1eb37b557fbe21bd27d8ea2b4d97b04989eeebcc312ef995bd3ad2350b"`
[INFO] running `"docker" "rm" "-f" "ea7b3e1eb37b557fbe21bd27d8ea2b4d97b04989eeebcc312ef995bd3ad2350b"`
[INFO] [stdout] ea7b3e1eb37b557fbe21bd27d8ea2b4d97b04989eeebcc312ef995bd3ad2350b
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a7f48e5e397ae7179c566b30d20a7e659a58b5024c7f199c8c626b6f5d368645
[INFO] running `"docker" "start" "-a" "a7f48e5e397ae7179c566b30d20a7e659a58b5024c7f199c8c626b6f5d368645"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling rev1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |         let mut prod = lock.lock().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: unused `std::sync::MutexGuard` that must be used
[INFO] [stderr]   --> src/main.rs:68:17
[INFO] [stderr]    |
[INFO] [stderr] 68 |                 cvar.wait(prod).unwrap();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if unused the Mutex will immediately unlock
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::sync::MutexGuard` that must be used
[INFO] [stderr]   --> src/main.rs:82:17
[INFO] [stderr]    |
[INFO] [stderr] 82 |                 cvar.wait(prod).unwrap();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if unused the Mutex will immediately unlock
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `"docker" "inspect" "a7f48e5e397ae7179c566b30d20a7e659a58b5024c7f199c8c626b6f5d368645"`
[INFO] running `"docker" "rm" "-f" "a7f48e5e397ae7179c566b30d20a7e659a58b5024c7f199c8c626b6f5d368645"`
[INFO] [stdout] a7f48e5e397ae7179c566b30d20a7e659a58b5024c7f199c8c626b6f5d368645
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 871dca0432e073bc1d31d54f3bd41777f4fa751bdc03800235cc362da912fd08
[INFO] running `"docker" "start" "-a" "871dca0432e073bc1d31d54f3bd41777f4fa751bdc03800235cc362da912fd08"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |         let mut prod = lock.lock().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: unused `std::sync::MutexGuard` that must be used
[INFO] [stderr]   --> src/main.rs:68:17
[INFO] [stderr]    |
[INFO] [stderr] 68 |                 cvar.wait(prod).unwrap();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if unused the Mutex will immediately unlock
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::sync::MutexGuard` that must be used
[INFO] [stderr]   --> src/main.rs:82:17
[INFO] [stderr]    |
[INFO] [stderr] 82 |                 cvar.wait(prod).unwrap();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if unused the Mutex will immediately unlock
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rev1-8947c9142204dbc1
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "871dca0432e073bc1d31d54f3bd41777f4fa751bdc03800235cc362da912fd08"`
[INFO] running `"docker" "rm" "-f" "871dca0432e073bc1d31d54f3bd41777f4fa751bdc03800235cc362da912fd08"`
[INFO] [stdout] 871dca0432e073bc1d31d54f3bd41777f4fa751bdc03800235cc362da912fd08