Dec 05 16:27:16.771 INFO testing limitLiu/learn-rust-by-rust-book against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 05 16:27:16.772 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 05 16:27:17.300 INFO [stdout] 790d8799bb60332d66851a7db61a554a52d555d576e5bc0e79bcf22de1e976f4
Dec 05 16:27:17.302 INFO running `"docker" "start" "-a" "790d8799bb60332d66851a7db61a554a52d555d576e5bc0e79bcf22de1e976f4"`
Dec 05 16:27:18.589 INFO [stderr] usermod: no changes
Dec 05 16:27:18.647 INFO [stderr]    Compiling learn-rs v0.1.0 (/source)
Dec 05 16:27:19.216 INFO [stderr] warning: unused variable: `s`
Dec 05 16:27:19.216 INFO [stderr]  --> src/_5_common_collections/_2_strings.rs:2:13
Dec 05 16:27:19.216 INFO [stderr]   |
Dec 05 16:27:19.216 INFO [stderr] 2 |     let mut s = String::new();
Dec 05 16:27:19.216 INFO [stderr]   |             ^ help: consider using `_s` instead
Dec 05 16:27:19.216 INFO [stderr]   |
Dec 05 16:27:19.216 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 05 16:27:19.216 INFO [stderr] 
Dec 05 16:27:19.216 INFO [stderr] warning: unused variable: `s`
Dec 05 16:27:19.216 INFO [stderr]  --> src/_5_common_collections/_2_strings.rs:4:9
Dec 05 16:27:19.216 INFO [stderr]   |
Dec 05 16:27:19.216 INFO [stderr] 4 |     let s = data.to_string();
Dec 05 16:27:19.216 INFO [stderr]   |         ^ help: consider using `_s` instead
Dec 05 16:27:19.216 INFO [stderr] 
Dec 05 16:27:19.216 INFO [stderr] warning: unused variable: `s`
Dec 05 16:27:19.216 INFO [stderr]  --> src/_5_common_collections/_2_strings.rs:5:9
Dec 05 16:27:19.216 INFO [stderr]   |
Dec 05 16:27:19.216 INFO [stderr] 5 |     let s = "initial contents".to_string();
Dec 05 16:27:19.216 INFO [stderr]   |         ^ help: consider using `_s` instead
Dec 05 16:27:19.216 INFO [stderr] 
Dec 05 16:27:19.216 INFO [stderr] warning: unused variable: `s`
Dec 05 16:27:19.216 INFO [stderr]  --> src/_5_common_collections/_2_strings.rs:6:9
Dec 05 16:27:19.216 INFO [stderr]   |
Dec 05 16:27:19.216 INFO [stderr] 6 |     let s = String::from(data);
Dec 05 16:27:19.216 INFO [stderr]   |         ^ help: consider using `_s` instead
Dec 05 16:27:19.216 INFO [stderr] 
Dec 05 16:27:19.280 INFO [stderr] warning: variable does not need to be mutable
Dec 05 16:27:19.280 INFO [stderr]  --> src/_5_common_collections/_2_strings.rs:2:9
Dec 05 16:27:19.280 INFO [stderr]   |
Dec 05 16:27:19.280 INFO [stderr] 2 |     let mut s = String::new();
Dec 05 16:27:19.280 INFO [stderr]   |         ----^
Dec 05 16:27:19.280 INFO [stderr]   |         |
Dec 05 16:27:19.280 INFO [stderr]   |         help: remove this `mut`
Dec 05 16:27:19.280 INFO [stderr]   |
Dec 05 16:27:19.280 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 05 16:27:19.280 INFO [stderr] 
Dec 05 16:27:20.737 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.11s
Dec 05 16:27:20.738 INFO [stderr] su: No module specific data is present
Dec 05 16:27:21.777 INFO running `"docker" "inspect" "790d8799bb60332d66851a7db61a554a52d555d576e5bc0e79bcf22de1e976f4"`
Dec 05 16:27:22.060 INFO running `"docker" "rm" "-f" "790d8799bb60332d66851a7db61a554a52d555d576e5bc0e79bcf22de1e976f4"`
Dec 05 16:27:22.528 INFO [stdout] 790d8799bb60332d66851a7db61a554a52d555d576e5bc0e79bcf22de1e976f4
Dec 05 16:27:22.536 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 05 16:27:22.877 INFO [stdout] ebdd221430ae718a6928b3da210025a1a02da8f65cb8bbe5ee3aff4b5fd48fe8
Dec 05 16:27:22.881 INFO running `"docker" "start" "-a" "ebdd221430ae718a6928b3da210025a1a02da8f65cb8bbe5ee3aff4b5fd48fe8"`
Dec 05 16:27:23.629 INFO [stderr] usermod: no changes
Dec 05 16:27:23.665 INFO [stderr]    Compiling learn-rs v0.1.0 (/source)
Dec 05 16:27:24.228 INFO [stderr] warning: unused variable: `s`
Dec 05 16:27:24.228 INFO [stderr]  --> src/_5_common_collections/_2_strings.rs:2:13
Dec 05 16:27:24.228 INFO [stderr]   |
Dec 05 16:27:24.228 INFO [stderr] 2 |     let mut s = String::new();
Dec 05 16:27:24.228 INFO [stderr]   |             ^ help: consider using `_s` instead
Dec 05 16:27:24.228 INFO [stderr]   |
Dec 05 16:27:24.228 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 05 16:27:24.228 INFO [stderr] 
Dec 05 16:27:24.228 INFO [stderr] warning: unused variable: `s`
Dec 05 16:27:24.228 INFO [stderr]  --> src/_5_common_collections/_2_strings.rs:4:9
Dec 05 16:27:24.228 INFO [stderr]   |
Dec 05 16:27:24.228 INFO [stderr] 4 |     let s = data.to_string();
Dec 05 16:27:24.228 INFO [stderr]   |         ^ help: consider using `_s` instead
Dec 05 16:27:24.228 INFO [stderr] 
Dec 05 16:27:24.228 INFO [stderr] warning: unused variable: `s`
Dec 05 16:27:24.228 INFO [stderr]  --> src/_5_common_collections/_2_strings.rs:5:9
Dec 05 16:27:24.228 INFO [stderr]   |
Dec 05 16:27:24.228 INFO [stderr] 5 |     let s = "initial contents".to_string();
Dec 05 16:27:24.228 INFO [stderr]   |         ^ help: consider using `_s` instead
Dec 05 16:27:24.229 INFO [stderr] 
Dec 05 16:27:24.229 INFO [stderr] warning: unused variable: `s`
Dec 05 16:27:24.229 INFO [stderr]  --> src/_5_common_collections/_2_strings.rs:6:9
Dec 05 16:27:24.229 INFO [stderr]   |
Dec 05 16:27:24.229 INFO [stderr] 6 |     let s = String::from(data);
Dec 05 16:27:24.229 INFO [stderr]   |         ^ help: consider using `_s` instead
Dec 05 16:27:24.229 INFO [stderr] 
Dec 05 16:27:24.324 INFO [stderr] warning: variable does not need to be mutable
Dec 05 16:27:24.324 INFO [stderr]  --> src/_5_common_collections/_2_strings.rs:2:9
Dec 05 16:27:24.324 INFO [stderr]   |
Dec 05 16:27:24.324 INFO [stderr] 2 |     let mut s = String::new();
Dec 05 16:27:24.324 INFO [stderr]   |         ----^
Dec 05 16:27:24.324 INFO [stderr]   |         |
Dec 05 16:27:24.324 INFO [stderr]   |         help: remove this `mut`
Dec 05 16:27:24.324 INFO [stderr]   |
Dec 05 16:27:24.324 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 05 16:27:24.324 INFO [stderr] 
Dec 05 16:27:24.716 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
Dec 05 16:27:24.716 INFO [stderr] su: No module specific data is present
Dec 05 16:27:25.596 INFO running `"docker" "inspect" "ebdd221430ae718a6928b3da210025a1a02da8f65cb8bbe5ee3aff4b5fd48fe8"`
Dec 05 16:27:25.842 INFO running `"docker" "rm" "-f" "ebdd221430ae718a6928b3da210025a1a02da8f65cb8bbe5ee3aff4b5fd48fe8"`
Dec 05 16:27:26.056 INFO [stdout] ebdd221430ae718a6928b3da210025a1a02da8f65cb8bbe5ee3aff4b5fd48fe8
Dec 05 16:27:26.058 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 05 16:27:26.550 INFO [stdout] 49a8d780ebe3c62eae72f25d0dc24321e5fe01e23aa333e168d11a5633c8d456
Dec 05 16:27:26.562 INFO running `"docker" "start" "-a" "49a8d780ebe3c62eae72f25d0dc24321e5fe01e23aa333e168d11a5633c8d456"`
Dec 05 16:27:28.085 INFO [stderr] usermod: no changes
Dec 05 16:27:28.142 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Dec 05 16:27:28.142 INFO [stderr]      Running /target/debug/deps/learn_rs-2bc4f9c20ef021a9
Dec 05 16:27:28.146 INFO [stdout] 
Dec 05 16:27:28.146 INFO [stdout] running 0 tests
Dec 05 16:27:28.146 INFO [stdout] 
Dec 05 16:27:28.146 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 05 16:27:28.146 INFO [stdout] 
Dec 05 16:27:28.153 INFO [stderr] su: No module specific data is present
Dec 05 16:27:28.732 INFO running `"docker" "inspect" "49a8d780ebe3c62eae72f25d0dc24321e5fe01e23aa333e168d11a5633c8d456"`
Dec 05 16:27:29.124 INFO running `"docker" "rm" "-f" "49a8d780ebe3c62eae72f25d0dc24321e5fe01e23aa333e168d11a5633c8d456"`
Dec 05 16:27:29.598 INFO [stdout] 49a8d780ebe3c62eae72f25d0dc24321e5fe01e23aa333e168d11a5633c8d456