[INFO] crate slack-gc 1.0.1 is already in cache
[INFO] extracting crate slack-gc 1.0.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/slack-gc/1.0.1
[INFO] extracting crate slack-gc 1.0.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/slack-gc/1.0.1
[INFO] validating manifest of slack-gc-1.0.1 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 slack-gc-1.0.1 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 slack-gc-1.0.1
[INFO] finished frobbing slack-gc-1.0.1
[INFO] frobbed toml for slack-gc-1.0.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/slack-gc/1.0.1/Cargo.toml
[INFO] started frobbing slack-gc-1.0.1
[INFO] finished frobbing slack-gc-1.0.1
[INFO] frobbed toml for slack-gc-1.0.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/slack-gc/1.0.1/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] [stderr]     Blocking waiting for file lock on package cache
[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 slack-gc-1.0.1 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-6/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/slack-gc/1.0.1:/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] 3615cad963390c27fd701887b8c290841afd1e3e254e33bdcd70e488c6d39966
[INFO] running `"docker" "start" "-a" "3615cad963390c27fd701887b8c290841afd1e3e254e33bdcd70e488c6d39966"`
[INFO] [stderr]    Compiling fern v0.5.8
[INFO] [stderr]    Compiling pretty-bytes v0.2.2
[INFO] [stderr]    Compiling hyper v0.11.27
[INFO] [stderr]    Compiling hyper-tls v0.1.4
[INFO] [stderr]    Compiling reqwest v0.8.8
[INFO] [stderr]    Compiling slack_api v0.20.0
[INFO] [stderr]    Compiling slack-gc v1.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/main.rs:73:1
[INFO] [stderr]    |
[INFO] [stderr] 73 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 50.37s
[INFO] running `"docker" "inspect" "3615cad963390c27fd701887b8c290841afd1e3e254e33bdcd70e488c6d39966"`
[INFO] running `"docker" "rm" "-f" "3615cad963390c27fd701887b8c290841afd1e3e254e33bdcd70e488c6d39966"`
[INFO] [stdout] 3615cad963390c27fd701887b8c290841afd1e3e254e33bdcd70e488c6d39966
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/slack-gc/1.0.1:/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] ae8bdc11fb94987087a8f13c5679bb171184467cd4b67dd5d4c2efab00b06189
[INFO] running `"docker" "start" "-a" "ae8bdc11fb94987087a8f13c5679bb171184467cd4b67dd5d4c2efab00b06189"`
[INFO] [stderr]    Compiling slack-gc v1.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/main.rs:73:1
[INFO] [stderr]    |
[INFO] [stderr] 73 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.58s
[INFO] running `"docker" "inspect" "ae8bdc11fb94987087a8f13c5679bb171184467cd4b67dd5d4c2efab00b06189"`
[INFO] running `"docker" "rm" "-f" "ae8bdc11fb94987087a8f13c5679bb171184467cd4b67dd5d4c2efab00b06189"`
[INFO] [stdout] ae8bdc11fb94987087a8f13c5679bb171184467cd4b67dd5d4c2efab00b06189
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/slack-gc/1.0.1:/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] 22809d7a589327963a9f88f94e754aae39c3f7b3a5f01372c61969612bd8e7d4
[INFO] running `"docker" "start" "-a" "22809d7a589327963a9f88f94e754aae39c3f7b3a5f01372c61969612bd8e7d4"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.16s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/slack_gc-95b65f43784810d3
[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" "22809d7a589327963a9f88f94e754aae39c3f7b3a5f01372c61969612bd8e7d4"`
[INFO] running `"docker" "rm" "-f" "22809d7a589327963a9f88f94e754aae39c3f7b3a5f01372c61969612bd8e7d4"`
[INFO] [stdout] 22809d7a589327963a9f88f94e754aae39c3f7b3a5f01372c61969612bd8e7d4