Nov 16 15:35:35.392 INFO testing robbystk/rust-by-the-book against master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c for pr-55982
Nov 16 15:35:35.392 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-4/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-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"`
Nov 16 15:35:35.760 INFO [stdout] 3934173de356d940d58c4471746e2061fa142184ae50699b400a9ab189009eab
Nov 16 15:35:35.768 INFO running `"docker" "start" "-a" "3934173de356d940d58c4471746e2061fa142184ae50699b400a9ab189009eab"`
Nov 16 15:35:37.024 INFO [stderr] usermod: no changes
Nov 16 15:35:37.083 INFO [stderr]    Compiling errors v0.1.0 (/source)
Nov 16 15:35:37.267 INFO [stderr] warning: unused variable: `f`
Nov 16 15:35:37.268 INFO [stderr]  --> src/main.rs:4:9
Nov 16 15:35:37.268 INFO [stderr]   |
Nov 16 15:35:37.268 INFO [stderr] 4 |     let f = File::open("hello.txt").expect("Failed to open hello.txt");
Nov 16 15:35:37.268 INFO [stderr]   |         ^ help: consider using `_f` instead
Nov 16 15:35:37.269 INFO [stderr]   |
Nov 16 15:35:37.269 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 16 15:35:37.269 INFO [stderr] 
Nov 16 15:35:37.540 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
Nov 16 15:35:37.543 INFO [stderr] su: No module specific data is present
Nov 16 15:35:38.141 INFO running `"docker" "inspect" "3934173de356d940d58c4471746e2061fa142184ae50699b400a9ab189009eab"`
Nov 16 15:35:38.409 INFO running `"docker" "rm" "-f" "3934173de356d940d58c4471746e2061fa142184ae50699b400a9ab189009eab"`
Nov 16 15:35:38.635 INFO [stdout] 3934173de356d940d58c4471746e2061fa142184ae50699b400a9ab189009eab
Nov 16 15:35:38.639 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-4/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-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"`
Nov 16 15:35:39.039 INFO [stdout] 9a6f6bc552dd524115bf904c6511d357ec2c496960f9ae72059e5af9bdc9422c
Nov 16 15:35:39.042 INFO running `"docker" "start" "-a" "9a6f6bc552dd524115bf904c6511d357ec2c496960f9ae72059e5af9bdc9422c"`
Nov 16 15:35:40.325 INFO [stderr] usermod: no changes
Nov 16 15:35:40.363 INFO [stderr]    Compiling errors v0.1.0 (/source)
Nov 16 15:35:40.607 INFO [stderr] warning: unused variable: `f`
Nov 16 15:35:40.607 INFO [stderr]  --> src/main.rs:4:9
Nov 16 15:35:40.607 INFO [stderr]   |
Nov 16 15:35:40.607 INFO [stderr] 4 |     let f = File::open("hello.txt").expect("Failed to open hello.txt");
Nov 16 15:35:40.607 INFO [stderr]   |         ^ help: consider using `_f` instead
Nov 16 15:35:40.607 INFO [stderr]   |
Nov 16 15:35:40.607 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 16 15:35:40.607 INFO [stderr] 
Nov 16 15:35:40.975 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
Nov 16 15:35:40.975 INFO [stderr] su: No module specific data is present
Nov 16 15:35:41.789 INFO running `"docker" "inspect" "9a6f6bc552dd524115bf904c6511d357ec2c496960f9ae72059e5af9bdc9422c"`
Nov 16 15:35:42.195 INFO running `"docker" "rm" "-f" "9a6f6bc552dd524115bf904c6511d357ec2c496960f9ae72059e5af9bdc9422c"`
Nov 16 15:35:42.496 INFO [stdout] 9a6f6bc552dd524115bf904c6511d357ec2c496960f9ae72059e5af9bdc9422c
Nov 16 15:35:42.502 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-4/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-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"`
Nov 16 15:35:43.014 INFO [stdout] 0edb1f51ecb46ba874df8b21a4795ce9ee5fc2c7cd3a86a00ccaabb25ba2c4a5
Nov 16 15:35:43.023 INFO running `"docker" "start" "-a" "0edb1f51ecb46ba874df8b21a4795ce9ee5fc2c7cd3a86a00ccaabb25ba2c4a5"`
Nov 16 15:35:44.458 INFO [stderr] usermod: no changes
Nov 16 15:35:44.519 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
Nov 16 15:35:44.521 INFO [stderr]      Running /target/debug/deps/errors-2b12d412867c42d9
Nov 16 15:35:44.529 INFO [stdout] 
Nov 16 15:35:44.529 INFO [stdout] running 0 tests
Nov 16 15:35:44.529 INFO [stdout] 
Nov 16 15:35:44.529 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Nov 16 15:35:44.529 INFO [stdout] 
Nov 16 15:35:44.535 INFO [stderr] su: No module specific data is present
Nov 16 15:35:45.196 INFO running `"docker" "inspect" "0edb1f51ecb46ba874df8b21a4795ce9ee5fc2c7cd3a86a00ccaabb25ba2c4a5"`
Nov 16 15:35:45.545 INFO running `"docker" "rm" "-f" "0edb1f51ecb46ba874df8b21a4795ce9ee5fc2c7cd3a86a00ccaabb25ba2c4a5"`
Nov 16 15:35:45.846 INFO [stdout] 0edb1f51ecb46ba874df8b21a4795ce9ee5fc2c7cd3a86a00ccaabb25ba2c4a5