[INFO] crate forust 0.1.0 is already in cache
[INFO] extracting crate forust 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/forust/0.1.0
[INFO] extracting crate forust 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/forust/0.1.0
[INFO] validating manifest of forust-0.1.0 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 forust-0.1.0 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 forust-0.1.0
[INFO] finished frobbing forust-0.1.0
[INFO] frobbed toml for forust-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/forust/0.1.0/Cargo.toml
[INFO] started frobbing forust-0.1.0
[INFO] finished frobbing forust-0.1.0
[INFO] frobbed toml for forust-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/forust/0.1.0/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 forust-0.1.0 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-4/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/forust/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] aa1a2287bca68a9b228ad8673ae854a6e01b65b9cd0e453cfc04a246c10fcd05
[INFO] running `"docker" "start" "-a" "aa1a2287bca68a9b228ad8673ae854a6e01b65b9cd0e453cfc04a246c10fcd05"`
[INFO] [stderr]    Compiling clap v1.5.6
[INFO] [stderr]    Compiling forust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `contents`
[INFO] [stderr]   --> src/main.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let contents = open_file(dir, file);
[INFO] [stderr]    |         ^^^^^^^^ help: consider prefixing with an underscore: `_contents`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.44s
[INFO] running `"docker" "inspect" "aa1a2287bca68a9b228ad8673ae854a6e01b65b9cd0e453cfc04a246c10fcd05"`
[INFO] running `"docker" "rm" "-f" "aa1a2287bca68a9b228ad8673ae854a6e01b65b9cd0e453cfc04a246c10fcd05"`
[INFO] [stdout] aa1a2287bca68a9b228ad8673ae854a6e01b65b9cd0e453cfc04a246c10fcd05
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/forust/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 45903b062a6ddca0342ff28fa5b1d71a96973e6030d404e67cd5c2b4858a16a5
[INFO] running `"docker" "start" "-a" "45903b062a6ddca0342ff28fa5b1d71a96973e6030d404e67cd5c2b4858a16a5"`
[INFO] [stderr]    Compiling forust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `contents`
[INFO] [stderr]   --> src/main.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let contents = open_file(dir, file);
[INFO] [stderr]    |         ^^^^^^^^ help: consider prefixing with an underscore: `_contents`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `"docker" "inspect" "45903b062a6ddca0342ff28fa5b1d71a96973e6030d404e67cd5c2b4858a16a5"`
[INFO] running `"docker" "rm" "-f" "45903b062a6ddca0342ff28fa5b1d71a96973e6030d404e67cd5c2b4858a16a5"`
[INFO] [stdout] 45903b062a6ddca0342ff28fa5b1d71a96973e6030d404e67cd5c2b4858a16a5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/forust/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 3ec591328fda06132e3dd0c31ae540341e994dff6bfeacb94e44306dc0a1b043
[INFO] running `"docker" "start" "-a" "3ec591328fda06132e3dd0c31ae540341e994dff6bfeacb94e44306dc0a1b043"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/forust-b1ca37c937394e55
[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" "3ec591328fda06132e3dd0c31ae540341e994dff6bfeacb94e44306dc0a1b043"`
[INFO] running `"docker" "rm" "-f" "3ec591328fda06132e3dd0c31ae540341e994dff6bfeacb94e44306dc0a1b043"`
[INFO] [stdout] 3ec591328fda06132e3dd0c31ae540341e994dff6bfeacb94e44306dc0a1b043