[INFO] updating cached repository truongtu2111/return_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/truongtu2111/return_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/truongtu2111/return_rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/truongtu2111/return_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/truongtu2111/return_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/truongtu2111/return_rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/truongtu2111/return_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/truongtu2111/return_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c740a43c753605ef8ba66d02233dd26b6d78c2ed
[INFO] sha for GitHub repo truongtu2111/return_rust: c740a43c753605ef8ba66d02233dd26b6d78c2ed
[INFO] validating manifest of truongtu2111/return_rust 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 truongtu2111/return_rust 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 truongtu2111/return_rust
[INFO] finished frobbing truongtu2111/return_rust
[INFO] frobbed toml for truongtu2111/return_rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/truongtu2111/return_rust/Cargo.toml
[INFO] started frobbing truongtu2111/return_rust
[INFO] finished frobbing truongtu2111/return_rust
[INFO] frobbed toml for truongtu2111/return_rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/truongtu2111/return_rust/Cargo.toml
[INFO] crate truongtu2111/return_rust already has a lockfile, it will not be regenerated
[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 truongtu2111/return_rust against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/truongtu2111/return_rust:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] beda5ae1ebcc25d0eb06c3b5a60417efdec6eab79654d5a59883ada63a892390
[INFO] running `"docker" "start" "-a" "beda5ae1ebcc25d0eb06c3b5a60417efdec6eab79654d5a59883ada63a892390"`
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling return_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.93s
[INFO] running `"docker" "inspect" "beda5ae1ebcc25d0eb06c3b5a60417efdec6eab79654d5a59883ada63a892390"`
[INFO] running `"docker" "rm" "-f" "beda5ae1ebcc25d0eb06c3b5a60417efdec6eab79654d5a59883ada63a892390"`
[INFO] [stdout] beda5ae1ebcc25d0eb06c3b5a60417efdec6eab79654d5a59883ada63a892390
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/truongtu2111/return_rust:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 994187ec8220b223c9875280fe48d862f4635c219382a23df4319132f1485bd2
[INFO] running `"docker" "start" "-a" "994187ec8220b223c9875280fe48d862f4635c219382a23df4319132f1485bd2"`
[INFO] [stderr]    Compiling return_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `"docker" "inspect" "994187ec8220b223c9875280fe48d862f4635c219382a23df4319132f1485bd2"`
[INFO] running `"docker" "rm" "-f" "994187ec8220b223c9875280fe48d862f4635c219382a23df4319132f1485bd2"`
[INFO] [stdout] 994187ec8220b223c9875280fe48d862f4635c219382a23df4319132f1485bd2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/truongtu2111/return_rust:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 6275f248b3334892392a00ae931a037b7a31a4dbdcfb100358a325d4af59ee7d
[INFO] running `"docker" "start" "-a" "6275f248b3334892392a00ae931a037b7a31a4dbdcfb100358a325d4af59ee7d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/return_rust-864ed49ddec7fa5a
[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" "6275f248b3334892392a00ae931a037b7a31a4dbdcfb100358a325d4af59ee7d"`
[INFO] running `"docker" "rm" "-f" "6275f248b3334892392a00ae931a037b7a31a4dbdcfb100358a325d4af59ee7d"`
[INFO] [stdout] 6275f248b3334892392a00ae931a037b7a31a4dbdcfb100358a325d4af59ee7d