[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-1.37-6/sources/1.36.0/gh/truongtu2111/return_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/truongtu2111/return_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/truongtu2111/return_rust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/truongtu2111/return_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of truongtu2111/return_rust 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 truongtu2111/return_rust
[INFO] finished frobbing truongtu2111/return_rust
[INFO] frobbed toml for truongtu2111/return_rust written to work/ex/beta-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/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" "+1.36.0" "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 truongtu2111/return_rust 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-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] cfd1d719bfffd9cf0b5536568c0c59cec7bd7bb61cab5d125c98f1856b4be1d4
[INFO] running `"docker" "start" "-a" "cfd1d719bfffd9cf0b5536568c0c59cec7bd7bb61cab5d125c98f1856b4be1d4"`
[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 4.02s
[INFO] running `"docker" "inspect" "cfd1d719bfffd9cf0b5536568c0c59cec7bd7bb61cab5d125c98f1856b4be1d4"`
[INFO] running `"docker" "rm" "-f" "cfd1d719bfffd9cf0b5536568c0c59cec7bd7bb61cab5d125c98f1856b4be1d4"`
[INFO] [stdout] cfd1d719bfffd9cf0b5536568c0c59cec7bd7bb61cab5d125c98f1856b4be1d4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] b45c07247ef75fdbb7d4f0434fcc003071664a51a710703b3338faa18bc3fa1a
[INFO] running `"docker" "start" "-a" "b45c07247ef75fdbb7d4f0434fcc003071664a51a710703b3338faa18bc3fa1a"`
[INFO] [stderr]    Compiling return_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `"docker" "inspect" "b45c07247ef75fdbb7d4f0434fcc003071664a51a710703b3338faa18bc3fa1a"`
[INFO] running `"docker" "rm" "-f" "b45c07247ef75fdbb7d4f0434fcc003071664a51a710703b3338faa18bc3fa1a"`
[INFO] [stdout] b45c07247ef75fdbb7d4f0434fcc003071664a51a710703b3338faa18bc3fa1a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 76d11e893c162fb6802002ce1efcbf1f281853674f5e70c3b8698cee0af9f2ff
[INFO] running `"docker" "start" "-a" "76d11e893c162fb6802002ce1efcbf1f281853674f5e70c3b8698cee0af9f2ff"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/return_rust-794b4edd64a1ec8a
[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" "76d11e893c162fb6802002ce1efcbf1f281853674f5e70c3b8698cee0af9f2ff"`
[INFO] running `"docker" "rm" "-f" "76d11e893c162fb6802002ce1efcbf1f281853674f5e70c3b8698cee0af9f2ff"`
[INFO] [stdout] 76d11e893c162fb6802002ce1efcbf1f281853674f5e70c3b8698cee0af9f2ff