[INFO] crate color_quant 1.0.1 is already in cache
[INFO] testing color_quant-1.0.1 against 1.38.0 for beta-1.39-1
[INFO] extracting crate color_quant 1.0.1 into work/builds/worker-0/source
[INFO] validating manifest of crates.io crate color_quant 1.0.1 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 crates.io crate color_quant 1.0.1
[INFO] finished tweaking crates.io crate color_quant 1.0.1
[INFO] tweaked toml for crates.io crate color_quant 1.0.1 written to work/builds/worker-0/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/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] 6c376ebcdfe751e51a8e2baa86542baeceaa8ec86d6cc09148c75c1d4cf766eb
[INFO] running `"docker" "start" "-a" "6c376ebcdfe751e51a8e2baa86542baeceaa8ec86d6cc09148c75c1d4cf766eb"`
[INFO] [stderr]    Compiling color_quant v1.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:368:21
[INFO] [stderr]     |
[INFO] [stderr] 368 |                 let mut j;
[INFO] [stderr]     |                     ----^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `"docker" "inspect" "6c376ebcdfe751e51a8e2baa86542baeceaa8ec86d6cc09148c75c1d4cf766eb"`
[INFO] running `"docker" "rm" "-f" "6c376ebcdfe751e51a8e2baa86542baeceaa8ec86d6cc09148c75c1d4cf766eb"`
[INFO] [stdout] 6c376ebcdfe751e51a8e2baa86542baeceaa8ec86d6cc09148c75c1d4cf766eb
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/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] 461491fb947e4d69ea1602a0c1a003a94ccdf8b1c8a59c255d498ee9db3b7a32
[INFO] running `"docker" "start" "-a" "461491fb947e4d69ea1602a0c1a003a94ccdf8b1c8a59c255d498ee9db3b7a32"`
[INFO] [stderr]    Compiling color_quant v1.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:368:21
[INFO] [stderr]     |
[INFO] [stderr] 368 |                 let mut j;
[INFO] [stderr]     |                     ----^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `"docker" "inspect" "461491fb947e4d69ea1602a0c1a003a94ccdf8b1c8a59c255d498ee9db3b7a32"`
[INFO] running `"docker" "rm" "-f" "461491fb947e4d69ea1602a0c1a003a94ccdf8b1c8a59c255d498ee9db3b7a32"`
[INFO] [stdout] 461491fb947e4d69ea1602a0c1a003a94ccdf8b1c8a59c255d498ee9db3b7a32
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/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] 95cdf8eb2e4d35e4558acd9067f342b7d85751bb5fac13d399d0f37ad7c8b1df
[INFO] running `"docker" "start" "-a" "95cdf8eb2e4d35e4558acd9067f342b7d85751bb5fac13d399d0f37ad7c8b1df"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/color_quant-fc4f5645ac09627c
[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 color_quant
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs -  (line 56) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "95cdf8eb2e4d35e4558acd9067f342b7d85751bb5fac13d399d0f37ad7c8b1df"`
[INFO] running `"docker" "rm" "-f" "95cdf8eb2e4d35e4558acd9067f342b7d85751bb5fac13d399d0f37ad7c8b1df"`
[INFO] [stdout] 95cdf8eb2e4d35e4558acd9067f342b7d85751bb5fac13d399d0f37ad7c8b1df