[INFO] updating cached repository ADRIEN9631/rust-practise
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ADRIEN9631/rust-practise
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ADRIEN9631/rust-practise" "work/ex/beta-1.38-1/sources/1.37.0/gh/ADRIEN9631/rust-practise"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ADRIEN9631/rust-practise'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ADRIEN9631/rust-practise" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ADRIEN9631/rust-practise"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ADRIEN9631/rust-practise'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] eb78a43a62bc0ac50f1e38800c3e47cfa0234857
[INFO] sha for GitHub repo ADRIEN9631/rust-practise: eb78a43a62bc0ac50f1e38800c3e47cfa0234857
[INFO] validating manifest of ADRIEN9631/rust-practise on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ADRIEN9631/rust-practise on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ADRIEN9631/rust-practise
[INFO] finished frobbing ADRIEN9631/rust-practise
[INFO] frobbed toml for ADRIEN9631/rust-practise written to work/ex/beta-1.38-1/sources/1.37.0/gh/ADRIEN9631/rust-practise/Cargo.toml
[INFO] started frobbing ADRIEN9631/rust-practise
[INFO] finished frobbing ADRIEN9631/rust-practise
[INFO] frobbed toml for ADRIEN9631/rust-practise written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ADRIEN9631/rust-practise/Cargo.toml
[INFO] crate ADRIEN9631/rust-practise already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing ADRIEN9631/rust-practise against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ADRIEN9631/rust-practise:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] e0c2263c84cac8ad5c25718a0d224e850de2eebfab52a0c4fde26b4696fc1f16
[INFO] running `"docker" "start" "-a" "e0c2263c84cac8ad5c25718a0d224e850de2eebfab52a0c4fde26b4696fc1f16"`
[INFO] [stderr]    Compiling minigrep v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/lib.rs:43:63
[INFO] [stderr]    |
[INFO] [stderr] 43 |             Some(arg) => bool::from_str(&arg).unwrap_or_else(|e| panic!("case sensitive option is not a bool")),
[INFO] [stderr]    |                                                               ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `handle`
[INFO] [stderr]   --> src/main.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let handle = thread::spawn(move || {
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_handle`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `file_content_searcher`
[INFO] [stderr]   --> src/main.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn file_content_searcher() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |             tx.send(i);
[INFO] [stderr]    |             ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.83s
[INFO] running `"docker" "inspect" "e0c2263c84cac8ad5c25718a0d224e850de2eebfab52a0c4fde26b4696fc1f16"`
[INFO] running `"docker" "rm" "-f" "e0c2263c84cac8ad5c25718a0d224e850de2eebfab52a0c4fde26b4696fc1f16"`
[INFO] [stdout] e0c2263c84cac8ad5c25718a0d224e850de2eebfab52a0c4fde26b4696fc1f16
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ADRIEN9631/rust-practise:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 4bf32dd7e33f7a6d75ce4b32c9b6ecb794e83c50f8c4abbd8fe3ccf40bed3fde
[INFO] running `"docker" "start" "-a" "4bf32dd7e33f7a6d75ce4b32c9b6ecb794e83c50f8c4abbd8fe3ccf40bed3fde"`
[INFO] [stderr]    Compiling minigrep v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `handle`
[INFO] [stderr]   --> src/main.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let handle = thread::spawn(move || {
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_handle`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `file_content_searcher`
[INFO] [stderr]   --> src/main.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn file_content_searcher() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |             tx.send(i);
[INFO] [stderr]    |             ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/lib.rs:43:63
[INFO] [stderr]    |
[INFO] [stderr] 43 |             Some(arg) => bool::from_str(&arg).unwrap_or_else(|e| panic!("case sensitive option is not a bool")),
[INFO] [stderr]    |                                                               ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.59s
[INFO] running `"docker" "inspect" "4bf32dd7e33f7a6d75ce4b32c9b6ecb794e83c50f8c4abbd8fe3ccf40bed3fde"`
[INFO] running `"docker" "rm" "-f" "4bf32dd7e33f7a6d75ce4b32c9b6ecb794e83c50f8c4abbd8fe3ccf40bed3fde"`
[INFO] [stdout] 4bf32dd7e33f7a6d75ce4b32c9b6ecb794e83c50f8c4abbd8fe3ccf40bed3fde
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ADRIEN9631/rust-practise:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 7389a3f649cd14d8f17aa6ce5b44acf4260d7773849a31cad43cc68fcae1b4a5
[INFO] running `"docker" "start" "-a" "7389a3f649cd14d8f17aa6ce5b44acf4260d7773849a31cad43cc68fcae1b4a5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/minigrep-f788900508bc8193
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::one_result ... ok
[INFO] [stdout] test tests::case_insensitive ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/minigrep-2526d647343947d2
[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] [stderr]    Doc-tests minigrep
[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" "7389a3f649cd14d8f17aa6ce5b44acf4260d7773849a31cad43cc68fcae1b4a5"`
[INFO] running `"docker" "rm" "-f" "7389a3f649cd14d8f17aa6ce5b44acf4260d7773849a31cad43cc68fcae1b4a5"`
[INFO] [stdout] 7389a3f649cd14d8f17aa6ce5b44acf4260d7773849a31cad43cc68fcae1b4a5