Dec 14 10:33:59.962 INFO testing Ermain-12/Introduction-to-Rust against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 14 10:33:59.962 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 14 10:34:00.140 INFO [stdout] 9f24f8a21250a5d455e78ac7303ef37d3ff0590e2db2688ef498fa614865e948
Dec 14 10:34:00.143 INFO running `"docker" "start" "-a" "9f24f8a21250a5d455e78ac7303ef37d3ff0590e2db2688ef498fa614865e948"`
Dec 14 10:34:00.561 INFO [stderr] usermod: no changes
Dec 14 10:34:00.615 INFO [stderr]    Compiling hello_world v0.1.0 (/source)
Dec 14 10:34:01.474 INFO [stderr] warning: variable does not need to be mutable
Dec 14 10:34:01.475 INFO [stderr]   --> src/main.rs:27:8
Dec 14 10:34:01.475 INFO [stderr]    |
Dec 14 10:34:01.475 INFO [stderr] 27 |    let mut twenty_one = my_vec.pop();
Dec 14 10:34:01.475 INFO [stderr]    |        ----^^^^^^^^^^
Dec 14 10:34:01.475 INFO [stderr]    |        |
Dec 14 10:34:01.475 INFO [stderr]    |        help: remove this `mut`
Dec 14 10:34:01.475 INFO [stderr]    |
Dec 14 10:34:01.475 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 14 10:34:01.475 INFO [stderr] 
Dec 14 10:34:02.440 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.86s
Dec 14 10:34:02.444 INFO [stderr] su: No module specific data is present
Dec 14 10:34:02.723 INFO running `"docker" "inspect" "9f24f8a21250a5d455e78ac7303ef37d3ff0590e2db2688ef498fa614865e948"`
Dec 14 10:34:02.849 INFO running `"docker" "rm" "-f" "9f24f8a21250a5d455e78ac7303ef37d3ff0590e2db2688ef498fa614865e948"`
Dec 14 10:34:02.979 INFO [stdout] 9f24f8a21250a5d455e78ac7303ef37d3ff0590e2db2688ef498fa614865e948
Dec 14 10:34:02.982 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 14 10:34:03.182 INFO [stdout] c94158bd6d57d47567087bba174b2611c5066117a0663153a0a6b93c29bc1e9d
Dec 14 10:34:03.184 INFO running `"docker" "start" "-a" "c94158bd6d57d47567087bba174b2611c5066117a0663153a0a6b93c29bc1e9d"`
Dec 14 10:34:03.575 INFO [stderr] usermod: no changes
Dec 14 10:34:03.628 INFO [stderr]    Compiling hello_world v0.1.0 (/source)
Dec 14 10:34:04.577 INFO [stderr] warning: variable does not need to be mutable
Dec 14 10:34:04.577 INFO [stderr]   --> src/main.rs:27:8
Dec 14 10:34:04.577 INFO [stderr]    |
Dec 14 10:34:04.577 INFO [stderr] 27 |    let mut twenty_one = my_vec.pop();
Dec 14 10:34:04.577 INFO [stderr]    |        ----^^^^^^^^^^
Dec 14 10:34:04.577 INFO [stderr]    |        |
Dec 14 10:34:04.577 INFO [stderr]    |        help: remove this `mut`
Dec 14 10:34:04.577 INFO [stderr]    |
Dec 14 10:34:04.577 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 14 10:34:04.577 INFO [stderr] 
Dec 14 10:34:04.847 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.25s
Dec 14 10:34:04.847 INFO [stderr] su: No module specific data is present
Dec 14 10:34:05.165 INFO running `"docker" "inspect" "c94158bd6d57d47567087bba174b2611c5066117a0663153a0a6b93c29bc1e9d"`
Dec 14 10:34:05.314 INFO running `"docker" "rm" "-f" "c94158bd6d57d47567087bba174b2611c5066117a0663153a0a6b93c29bc1e9d"`
Dec 14 10:34:05.451 INFO [stdout] c94158bd6d57d47567087bba174b2611c5066117a0663153a0a6b93c29bc1e9d
Dec 14 10:34:05.453 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 14 10:34:05.641 INFO [stdout] daa29422dd65f4404787a5f03ee0f58e9bbb52647c7cd33994b58dcf2f8c83ba
Dec 14 10:34:05.643 INFO running `"docker" "start" "-a" "daa29422dd65f4404787a5f03ee0f58e9bbb52647c7cd33994b58dcf2f8c83ba"`
Dec 14 10:34:05.972 INFO [stderr] usermod: no changes
Dec 14 10:34:06.015 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
Dec 14 10:34:06.016 INFO [stderr]      Running /target/debug/deps/hello_world-0dc518c3ccb6bb65
Dec 14 10:34:06.019 INFO [stdout] 
Dec 14 10:34:06.019 INFO [stdout] running 0 tests
Dec 14 10:34:06.019 INFO [stdout] 
Dec 14 10:34:06.019 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 10:34:06.019 INFO [stdout] 
Dec 14 10:34:06.021 INFO [stderr] su: No module specific data is present
Dec 14 10:34:06.251 INFO running `"docker" "inspect" "daa29422dd65f4404787a5f03ee0f58e9bbb52647c7cd33994b58dcf2f8c83ba"`
Dec 14 10:34:06.352 INFO running `"docker" "rm" "-f" "daa29422dd65f4404787a5f03ee0f58e9bbb52647c7cd33994b58dcf2f8c83ba"`
Dec 14 10:34:06.439 INFO [stdout] daa29422dd65f4404787a5f03ee0f58e9bbb52647c7cd33994b58dcf2f8c83ba