[INFO] crate iolaus 0.1.7 is already in cache
[INFO] extracting crate iolaus 0.1.7 into work/ex/beta-1.37-6/sources/1.36.0/reg/iolaus/0.1.7
[INFO] extracting crate iolaus 0.1.7 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/iolaus/0.1.7
[INFO] validating manifest of iolaus-0.1.7 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of iolaus-0.1.7 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing iolaus-0.1.7
[INFO] finished frobbing iolaus-0.1.7
[INFO] frobbed toml for iolaus-0.1.7 written to work/ex/beta-1.37-6/sources/1.36.0/reg/iolaus/0.1.7/Cargo.toml
[INFO] started frobbing iolaus-0.1.7
[INFO] finished frobbing iolaus-0.1.7
[INFO] frobbed toml for iolaus-0.1.7 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/iolaus/0.1.7/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing iolaus-0.1.7 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/iolaus/0.1.7:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 49ac5e2586bbbe4dcd837dabec0295ed06a881023c5584c478049f73e8e4f035
[INFO] running `"docker" "start" "-a" "49ac5e2586bbbe4dcd837dabec0295ed06a881023c5584c478049f73e8e4f035"`
[INFO] [stderr]    Compiling iolaus v0.1.7 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let mut base_path = env::current_dir().expect("Erro #0001");
[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 2.59s
[INFO] running `"docker" "inspect" "49ac5e2586bbbe4dcd837dabec0295ed06a881023c5584c478049f73e8e4f035"`
[INFO] running `"docker" "rm" "-f" "49ac5e2586bbbe4dcd837dabec0295ed06a881023c5584c478049f73e8e4f035"`
[INFO] [stdout] 49ac5e2586bbbe4dcd837dabec0295ed06a881023c5584c478049f73e8e4f035
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/iolaus/0.1.7:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 92adf3f7da0f1969d87ed291155527b588fe418e602ea5dfdfddf0902f4fc598
[INFO] running `"docker" "start" "-a" "92adf3f7da0f1969d87ed291155527b588fe418e602ea5dfdfddf0902f4fc598"`
[INFO] [stderr]    Compiling iolaus v0.1.7 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let mut base_path = env::current_dir().expect("Erro #0001");
[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 0.87s
[INFO] running `"docker" "inspect" "92adf3f7da0f1969d87ed291155527b588fe418e602ea5dfdfddf0902f4fc598"`
[INFO] running `"docker" "rm" "-f" "92adf3f7da0f1969d87ed291155527b588fe418e602ea5dfdfddf0902f4fc598"`
[INFO] [stdout] 92adf3f7da0f1969d87ed291155527b588fe418e602ea5dfdfddf0902f4fc598
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/iolaus/0.1.7:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 530cd39296f3ea656fb0ca9e71c59918318883f2cd0eac1c85fc82aa2f4d3785
[INFO] running `"docker" "start" "-a" "530cd39296f3ea656fb0ca9e71c59918318883f2cd0eac1c85fc82aa2f4d3785"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/iolaus-aa68bae8e1aed2c4
[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" "530cd39296f3ea656fb0ca9e71c59918318883f2cd0eac1c85fc82aa2f4d3785"`
[INFO] running `"docker" "rm" "-f" "530cd39296f3ea656fb0ca9e71c59918318883f2cd0eac1c85fc82aa2f4d3785"`
[INFO] [stdout] 530cd39296f3ea656fb0ca9e71c59918318883f2cd0eac1c85fc82aa2f4d3785