[INFO] updating cached repository https://github.com/m-g-dev/fbsep
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] dadcccc02332f35a81014596f15aeb7e8dd9d124
[INFO] testing m-g-dev/fbsep against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-g-dev%2Ffbsep" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/m-g-dev/fbsep on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/m-g-dev/fbsep
[INFO] finished tweaking git repo https://github.com/m-g-dev/fbsep
[INFO] tweaked toml for git repo https://github.com/m-g-dev/fbsep written to work/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/m-g-dev/fbsep already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] baf31d887328044fd0f781646bbdaaefdbc7373aec5cd5ef2bc066d3cbfeae70
[INFO] running `"docker" "start" "-a" "baf31d887328044fd0f781646bbdaaefdbc7373aec5cd5ef2bc066d3cbfeae70"`
[INFO] [stderr]    Compiling fbsep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `greyscale`
[INFO] [stderr]  --> src/lib.rs:1:21
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn binarization(greyscale: &[u8]) -> i32 {
[INFO] [stderr]   |                     ^^^^^^^^^ help: consider prefixing with an underscore: `_greyscale`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `"docker" "inspect" "baf31d887328044fd0f781646bbdaaefdbc7373aec5cd5ef2bc066d3cbfeae70"`
[INFO] running `"docker" "rm" "-f" "baf31d887328044fd0f781646bbdaaefdbc7373aec5cd5ef2bc066d3cbfeae70"`
[INFO] [stdout] baf31d887328044fd0f781646bbdaaefdbc7373aec5cd5ef2bc066d3cbfeae70
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] a9179b0697172805c9523f134e9d0f85f77a8c55f77dfdb1c0f85522414b0fd3
[INFO] running `"docker" "start" "-a" "a9179b0697172805c9523f134e9d0f85f77a8c55f77dfdb1c0f85522414b0fd3"`
[INFO] [stderr]    Compiling fbsep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `greyscale`
[INFO] [stderr]  --> src/lib.rs:1:21
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn binarization(greyscale: &[u8]) -> i32 {
[INFO] [stderr]   |                     ^^^^^^^^^ help: consider prefixing with an underscore: `_greyscale`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `a`
[INFO] [stderr]  --> src/lib.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn a() {
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `"docker" "inspect" "a9179b0697172805c9523f134e9d0f85f77a8c55f77dfdb1c0f85522414b0fd3"`
[INFO] running `"docker" "rm" "-f" "a9179b0697172805c9523f134e9d0f85f77a8c55f77dfdb1c0f85522414b0fd3"`
[INFO] [stdout] a9179b0697172805c9523f134e9d0f85f77a8c55f77dfdb1c0f85522414b0fd3
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] 46e1b0100260eed5b7d42698c1818579998bd1a1ad949c82d25800958c91e7f6
[INFO] running `"docker" "start" "-a" "46e1b0100260eed5b7d42698c1818579998bd1a1ad949c82d25800958c91e7f6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/fbsep-3690f6e4c8e962c0
[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 fbsep
[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" "46e1b0100260eed5b7d42698c1818579998bd1a1ad949c82d25800958c91e7f6"`
[INFO] running `"docker" "rm" "-f" "46e1b0100260eed5b7d42698c1818579998bd1a1ad949c82d25800958c91e7f6"`
[INFO] [stdout] 46e1b0100260eed5b7d42698c1818579998bd1a1ad949c82d25800958c91e7f6