[INFO] updating cached repository gcao/learn_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/gcao/learn_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/gcao/learn_rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/gcao/learn_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/gcao/learn_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/gcao/learn_rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gcao/learn_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gcao/learn_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a2d672b5f4bde5028c79485e4136671eb3e8b9e7
[INFO] sha for GitHub repo gcao/learn_rust: a2d672b5f4bde5028c79485e4136671eb3e8b9e7
[INFO] validating manifest of gcao/learn_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 gcao/learn_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 gcao/learn_rust
[INFO] finished frobbing gcao/learn_rust
[INFO] frobbed toml for gcao/learn_rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/gcao/learn_rust/Cargo.toml
[INFO] started frobbing gcao/learn_rust
[INFO] finished frobbing gcao/learn_rust
[INFO] frobbed toml for gcao/learn_rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gcao/learn_rust/Cargo.toml
[INFO] crate gcao/learn_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 gcao/learn_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/gcao/learn_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] 3a48bc844bf9600c42fd6aae053a7ff8fe9699ba9aa73756f6bfc08ce9dba18b
[INFO] running `"docker" "start" "-a" "3a48bc844bf9600c42fd6aae053a7ff8fe9699ba9aa73756f6bfc08ce9dba18b"`
[INFO] [stderr]    Compiling learn_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `"docker" "inspect" "3a48bc844bf9600c42fd6aae053a7ff8fe9699ba9aa73756f6bfc08ce9dba18b"`
[INFO] running `"docker" "rm" "-f" "3a48bc844bf9600c42fd6aae053a7ff8fe9699ba9aa73756f6bfc08ce9dba18b"`
[INFO] [stdout] 3a48bc844bf9600c42fd6aae053a7ff8fe9699ba9aa73756f6bfc08ce9dba18b
[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/gcao/learn_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] 05a720fd1617683a80c81385dc87427be2c3cd2d39bb7d36fdd64d4c33e14b04
[INFO] running `"docker" "start" "-a" "05a720fd1617683a80c81385dc87427be2c3cd2d39bb7d36fdd64d4c33e14b04"`
[INFO] [stderr]    Compiling learn_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `"docker" "inspect" "05a720fd1617683a80c81385dc87427be2c3cd2d39bb7d36fdd64d4c33e14b04"`
[INFO] running `"docker" "rm" "-f" "05a720fd1617683a80c81385dc87427be2c3cd2d39bb7d36fdd64d4c33e14b04"`
[INFO] [stdout] 05a720fd1617683a80c81385dc87427be2c3cd2d39bb7d36fdd64d4c33e14b04
[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/gcao/learn_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] 1de3cc2981bb798810696adc96f91a7ee344cc369fa384fe1a78a5d66dc7d169
[INFO] running `"docker" "start" "-a" "1de3cc2981bb798810696adc96f91a7ee344cc369fa384fe1a78a5d66dc7d169"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/learn_rust-23f963aacb2868ce
[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" "1de3cc2981bb798810696adc96f91a7ee344cc369fa384fe1a78a5d66dc7d169"`
[INFO] running `"docker" "rm" "-f" "1de3cc2981bb798810696adc96f91a7ee344cc369fa384fe1a78a5d66dc7d169"`
[INFO] [stdout] 1de3cc2981bb798810696adc96f91a7ee344cc369fa384fe1a78a5d66dc7d169