[INFO] updating cached repository teaearlgraycold/BrainFuck
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/teaearlgraycold/BrainFuck
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/teaearlgraycold/BrainFuck" "work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/teaearlgraycold/BrainFuck"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/teaearlgraycold/BrainFuck'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/teaearlgraycold/BrainFuck" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/teaearlgraycold/BrainFuck"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/teaearlgraycold/BrainFuck'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c88020ebd189e40b78cfdb12ab6c51fe6266a1d7
[INFO] sha for GitHub repo teaearlgraycold/BrainFuck: c88020ebd189e40b78cfdb12ab6c51fe6266a1d7
[INFO] validating manifest of teaearlgraycold/BrainFuck on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of teaearlgraycold/BrainFuck on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing teaearlgraycold/BrainFuck
[INFO] finished frobbing teaearlgraycold/BrainFuck
[INFO] frobbed toml for teaearlgraycold/BrainFuck written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/teaearlgraycold/BrainFuck/Cargo.toml
[INFO] started frobbing teaearlgraycold/BrainFuck
[INFO] finished frobbing teaearlgraycold/BrainFuck
[INFO] frobbed toml for teaearlgraycold/BrainFuck written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/teaearlgraycold/BrainFuck/Cargo.toml
[INFO] crate teaearlgraycold/BrainFuck has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing teaearlgraycold/BrainFuck against try#7fea0229842e79db1159ea58ad9a653b288efee9 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-4/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/teaearlgraycold/BrainFuck:/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=forbid" "-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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "build" "--frozen"`
[INFO] [stdout] 5a3b5df41165754e4a7406b6a603b1b9028455e49e86b19feaeae481d5d31bb2
[INFO] running `"docker" "start" "-a" "5a3b5df41165754e4a7406b6a603b1b9028455e49e86b19feaeae481d5d31bb2"`
[INFO] [stderr]    Compiling fucker v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `file_size`
[INFO] [stderr]   --> src/main.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let file_size = file.read_to_string(&mut buffer)?;
[INFO] [stderr]    |         ^^^^^^^^^ help: consider prefixing with an underscore: `_file_size`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/fucker.rs:124:21
[INFO] [stderr]     |
[INFO] [stderr] 124 |                     std::io::stdout().flush();
[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 1.24s
[INFO] running `"docker" "inspect" "5a3b5df41165754e4a7406b6a603b1b9028455e49e86b19feaeae481d5d31bb2"`
[INFO] running `"docker" "rm" "-f" "5a3b5df41165754e4a7406b6a603b1b9028455e49e86b19feaeae481d5d31bb2"`
[INFO] [stdout] 5a3b5df41165754e4a7406b6a603b1b9028455e49e86b19feaeae481d5d31bb2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-4/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/teaearlgraycold/BrainFuck:/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=forbid" "-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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] f2caf69069406bff0de916698b5b4954698c3701b737f74a895cd316b339c30d
[INFO] running `"docker" "start" "-a" "f2caf69069406bff0de916698b5b4954698c3701b737f74a895cd316b339c30d"`
[INFO] [stderr]    Compiling fucker v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `file_size`
[INFO] [stderr]   --> src/main.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let file_size = file.read_to_string(&mut buffer)?;
[INFO] [stderr]    |         ^^^^^^^^^ help: consider prefixing with an underscore: `_file_size`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/fucker.rs:124:21
[INFO] [stderr]     |
[INFO] [stderr] 124 |                     std::io::stdout().flush();
[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 0.80s
[INFO] running `"docker" "inspect" "f2caf69069406bff0de916698b5b4954698c3701b737f74a895cd316b339c30d"`
[INFO] running `"docker" "rm" "-f" "f2caf69069406bff0de916698b5b4954698c3701b737f74a895cd316b339c30d"`
[INFO] [stdout] f2caf69069406bff0de916698b5b4954698c3701b737f74a895cd316b339c30d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-4/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/teaearlgraycold/BrainFuck:/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=forbid" "-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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen"`
[INFO] [stdout] 84d4a4ec9f143f8d059fa5d640f8372cb55b0945a471d9c36b69f8f1d7aa7bc9
[INFO] running `"docker" "start" "-a" "84d4a4ec9f143f8d059fa5d640f8372cb55b0945a471d9c36b69f8f1d7aa7bc9"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/fucker-e678838c1770b834
[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" "84d4a4ec9f143f8d059fa5d640f8372cb55b0945a471d9c36b69f8f1d7aa7bc9"`
[INFO] running `"docker" "rm" "-f" "84d4a4ec9f143f8d059fa5d640f8372cb55b0945a471d9c36b69f8f1d7aa7bc9"`
[INFO] [stdout] 84d4a4ec9f143f8d059fa5d640f8372cb55b0945a471d9c36b69f8f1d7aa7bc9