[INFO] crate mediocore 0.1.0 is already in cache
[INFO] extracting crate mediocore 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/mediocore/0.1.0
[INFO] extracting crate mediocore 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/mediocore/0.1.0
[INFO] validating manifest of mediocore-0.1.0 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 mediocore-0.1.0 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 mediocore-0.1.0
[INFO] finished frobbing mediocore-0.1.0
[INFO] frobbed toml for mediocore-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/mediocore/0.1.0/Cargo.toml
[INFO] started frobbing mediocore-0.1.0
[INFO] finished frobbing mediocore-0.1.0
[INFO] frobbed toml for mediocore-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/mediocore/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 mediocore-0.1.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/mediocore/0.1.0:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 3317cbab690677401093f64486b0ba2f57d7cf0994ac4e109c1cf975168aaaaa
[INFO] running `"docker" "start" "-a" "3317cbab690677401093f64486b0ba2f57d7cf0994ac4e109c1cf975168aaaaa"`
[INFO] [stderr]    Compiling mediocore v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/bin/mdcr.rs:235:17
[INFO] [stderr]     |
[INFO] [stderr] 235 |             let mut pad_to = creline.len() + per_core_chars;
[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 4.10s
[INFO] running `"docker" "inspect" "3317cbab690677401093f64486b0ba2f57d7cf0994ac4e109c1cf975168aaaaa"`
[INFO] running `"docker" "rm" "-f" "3317cbab690677401093f64486b0ba2f57d7cf0994ac4e109c1cf975168aaaaa"`
[INFO] [stdout] 3317cbab690677401093f64486b0ba2f57d7cf0994ac4e109c1cf975168aaaaa
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/mediocore/0.1.0:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] fcbe918c9a091dde7596471266db762bfd95fb85466e764a3354494b907a8969
[INFO] running `"docker" "start" "-a" "fcbe918c9a091dde7596471266db762bfd95fb85466e764a3354494b907a8969"`
[INFO] [stderr]    Compiling mediocore v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/bin/mdcr.rs:235:17
[INFO] [stderr]     |
[INFO] [stderr] 235 |             let mut pad_to = creline.len() + per_core_chars;
[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 1.80s
[INFO] running `"docker" "inspect" "fcbe918c9a091dde7596471266db762bfd95fb85466e764a3354494b907a8969"`
[INFO] running `"docker" "rm" "-f" "fcbe918c9a091dde7596471266db762bfd95fb85466e764a3354494b907a8969"`
[INFO] [stdout] fcbe918c9a091dde7596471266db762bfd95fb85466e764a3354494b907a8969
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/mediocore/0.1.0:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 096ac19d7434f49ee8e1973548e66b78eb0733c8b106ce0add79a7a3e2a43e13
[INFO] running `"docker" "start" "-a" "096ac19d7434f49ee8e1973548e66b78eb0733c8b106ce0add79a7a3e2a43e13"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mediocore-d9776f80a2723e4c
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test::govnor_validation ... ok
[INFO] [stdout] test test::freq_validation ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mdcr-388c60ec91813898
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests mediocore
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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" "096ac19d7434f49ee8e1973548e66b78eb0733c8b106ce0add79a7a3e2a43e13"`
[INFO] running `"docker" "rm" "-f" "096ac19d7434f49ee8e1973548e66b78eb0733c8b106ce0add79a7a3e2a43e13"`
[INFO] [stdout] 096ac19d7434f49ee8e1973548e66b78eb0733c8b106ce0add79a7a3e2a43e13