[INFO] updating cached repository arjunepr/a-simple-rust-exercise
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/arjunepr/a-simple-rust-exercise
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/arjunepr/a-simple-rust-exercise" "work/ex/beta-1.38-1/sources/1.37.0/gh/arjunepr/a-simple-rust-exercise"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/arjunepr/a-simple-rust-exercise'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/arjunepr/a-simple-rust-exercise" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/arjunepr/a-simple-rust-exercise"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/arjunepr/a-simple-rust-exercise'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 55cead71a0bf1c015c0e2e514ca9a68ee4ab7a2a
[INFO] sha for GitHub repo arjunepr/a-simple-rust-exercise: 55cead71a0bf1c015c0e2e514ca9a68ee4ab7a2a
[INFO] validating manifest of arjunepr/a-simple-rust-exercise 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 arjunepr/a-simple-rust-exercise 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 arjunepr/a-simple-rust-exercise
[INFO] finished frobbing arjunepr/a-simple-rust-exercise
[INFO] frobbed toml for arjunepr/a-simple-rust-exercise written to work/ex/beta-1.38-1/sources/1.37.0/gh/arjunepr/a-simple-rust-exercise/Cargo.toml
[INFO] started frobbing arjunepr/a-simple-rust-exercise
[INFO] finished frobbing arjunepr/a-simple-rust-exercise
[INFO] frobbed toml for arjunepr/a-simple-rust-exercise written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/arjunepr/a-simple-rust-exercise/Cargo.toml
[INFO] crate arjunepr/a-simple-rust-exercise 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 arjunepr/a-simple-rust-exercise 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/arjunepr/a-simple-rust-exercise:/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] 0e00338176d8171a3bedfe2f34a64d8c48bf04243846e8a60403bd9b4cda54a6
[INFO] running `"docker" "start" "-a" "0e00338176d8171a3bedfe2f34a64d8c48bf04243846e8a60403bd9b4cda54a6"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling text_io v0.1.7
[INFO] [stderr]    Compiling simple_project v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.69s
[INFO] running `"docker" "inspect" "0e00338176d8171a3bedfe2f34a64d8c48bf04243846e8a60403bd9b4cda54a6"`
[INFO] running `"docker" "rm" "-f" "0e00338176d8171a3bedfe2f34a64d8c48bf04243846e8a60403bd9b4cda54a6"`
[INFO] [stdout] 0e00338176d8171a3bedfe2f34a64d8c48bf04243846e8a60403bd9b4cda54a6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/arjunepr/a-simple-rust-exercise:/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] a18371d0c74c8711b5b11081dcbdbcc165643b3a6ff483bf81561055b9dc84e0
[INFO] running `"docker" "start" "-a" "a18371d0c74c8711b5b11081dcbdbcc165643b3a6ff483bf81561055b9dc84e0"`
[INFO] [stderr]    Compiling simple_project v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `"docker" "inspect" "a18371d0c74c8711b5b11081dcbdbcc165643b3a6ff483bf81561055b9dc84e0"`
[INFO] running `"docker" "rm" "-f" "a18371d0c74c8711b5b11081dcbdbcc165643b3a6ff483bf81561055b9dc84e0"`
[INFO] [stdout] a18371d0c74c8711b5b11081dcbdbcc165643b3a6ff483bf81561055b9dc84e0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/arjunepr/a-simple-rust-exercise:/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] 451a809e6ffda193ca523c5ff8e17fe9dd318818754a09adfd6c5e116eb18fb7
[INFO] running `"docker" "start" "-a" "451a809e6ffda193ca523c5ff8e17fe9dd318818754a09adfd6c5e116eb18fb7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/simple_project-ffce45e79cda3ded
[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" "451a809e6ffda193ca523c5ff8e17fe9dd318818754a09adfd6c5e116eb18fb7"`
[INFO] running `"docker" "rm" "-f" "451a809e6ffda193ca523c5ff8e17fe9dd318818754a09adfd6c5e116eb18fb7"`
[INFO] [stdout] 451a809e6ffda193ca523c5ff8e17fe9dd318818754a09adfd6c5e116eb18fb7