[INFO] updating cached repository practice-lang/rust-practice
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/practice-lang/rust-practice
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/practice-lang/rust-practice" "work/ex/beta-1.37-6/sources/1.36.0/gh/practice-lang/rust-practice"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/practice-lang/rust-practice'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/practice-lang/rust-practice" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/practice-lang/rust-practice"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/practice-lang/rust-practice'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d632032ae03941b42b795053f27baf1c5fe358a7
[INFO] sha for GitHub repo practice-lang/rust-practice: d632032ae03941b42b795053f27baf1c5fe358a7
[INFO] validating manifest of practice-lang/rust-practice 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 practice-lang/rust-practice 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 practice-lang/rust-practice
[INFO] finished frobbing practice-lang/rust-practice
[INFO] frobbed toml for practice-lang/rust-practice written to work/ex/beta-1.37-6/sources/1.36.0/gh/practice-lang/rust-practice/Cargo.toml
[INFO] started frobbing practice-lang/rust-practice
[INFO] finished frobbing practice-lang/rust-practice
[INFO] frobbed toml for practice-lang/rust-practice written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/practice-lang/rust-practice/Cargo.toml
[INFO] crate practice-lang/rust-practice already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing practice-lang/rust-practice against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/practice-lang/rust-practice:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] f33157975950b0172f2c07c1f51f5879202642129d86bb4d61de4e86d7e95c4c
[INFO] running `"docker" "start" "-a" "f33157975950b0172f2c07c1f51f5879202642129d86bb4d61de4e86d7e95c4c"`
[INFO] [stderr]    Compiling rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `"docker" "inspect" "f33157975950b0172f2c07c1f51f5879202642129d86bb4d61de4e86d7e95c4c"`
[INFO] running `"docker" "rm" "-f" "f33157975950b0172f2c07c1f51f5879202642129d86bb4d61de4e86d7e95c4c"`
[INFO] [stdout] f33157975950b0172f2c07c1f51f5879202642129d86bb4d61de4e86d7e95c4c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/practice-lang/rust-practice:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 5c0ebd645d8f556881d7a24dfd17d756657e6d3589e2123aa4ba080ca995b5b9
[INFO] running `"docker" "start" "-a" "5c0ebd645d8f556881d7a24dfd17d756657e6d3589e2123aa4ba080ca995b5b9"`
[INFO] [stderr]    Compiling rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `"docker" "inspect" "5c0ebd645d8f556881d7a24dfd17d756657e6d3589e2123aa4ba080ca995b5b9"`
[INFO] running `"docker" "rm" "-f" "5c0ebd645d8f556881d7a24dfd17d756657e6d3589e2123aa4ba080ca995b5b9"`
[INFO] [stdout] 5c0ebd645d8f556881d7a24dfd17d756657e6d3589e2123aa4ba080ca995b5b9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/practice-lang/rust-practice:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] e3394a89462a7ab0ed8782e14858a73f56c6021442f0ef697816ff0403e6140a
[INFO] running `"docker" "start" "-a" "e3394a89462a7ab0ed8782e14858a73f56c6021442f0ef697816ff0403e6140a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust-d242f78576cd3708
[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" "e3394a89462a7ab0ed8782e14858a73f56c6021442f0ef697816ff0403e6140a"`
[INFO] running `"docker" "rm" "-f" "e3394a89462a7ab0ed8782e14858a73f56c6021442f0ef697816ff0403e6140a"`
[INFO] [stdout] e3394a89462a7ab0ed8782e14858a73f56c6021442f0ef697816ff0403e6140a