[INFO] updating cached repository ananthdurai/rustlearn
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ananthdurai/rustlearn
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ananthdurai/rustlearn" "work/ex/beta-1.38-1/sources/1.37.0/gh/ananthdurai/rustlearn"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ananthdurai/rustlearn'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ananthdurai/rustlearn" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ananthdurai/rustlearn"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ananthdurai/rustlearn'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 665b1cc5a464fc2772f1d0ea1d2917e99bc72b43
[INFO] sha for GitHub repo ananthdurai/rustlearn: 665b1cc5a464fc2772f1d0ea1d2917e99bc72b43
[INFO] validating manifest of ananthdurai/rustlearn 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 ananthdurai/rustlearn 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 ananthdurai/rustlearn
[INFO] finished frobbing ananthdurai/rustlearn
[INFO] frobbed toml for ananthdurai/rustlearn written to work/ex/beta-1.38-1/sources/1.37.0/gh/ananthdurai/rustlearn/Cargo.toml
[INFO] started frobbing ananthdurai/rustlearn
[INFO] finished frobbing ananthdurai/rustlearn
[INFO] frobbed toml for ananthdurai/rustlearn written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ananthdurai/rustlearn/Cargo.toml
[INFO] crate ananthdurai/rustlearn 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 ananthdurai/rustlearn 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ananthdurai/rustlearn:/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] ead1836c438c882fde6c8a61820976cea9ff2a33dc9be6cc7b1acb05536abf25
[INFO] running `"docker" "start" "-a" "ead1836c438c882fde6c8a61820976cea9ff2a33dc9be6cc7b1acb05536abf25"`
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rand_jitter v0.1.3
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling csv-core v0.1.5
[INFO] [stderr]    Compiling csv v1.0.7
[INFO] [stderr]    Compiling rustlearn v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.47s
[INFO] running `"docker" "inspect" "ead1836c438c882fde6c8a61820976cea9ff2a33dc9be6cc7b1acb05536abf25"`
[INFO] running `"docker" "rm" "-f" "ead1836c438c882fde6c8a61820976cea9ff2a33dc9be6cc7b1acb05536abf25"`
[INFO] [stdout] ead1836c438c882fde6c8a61820976cea9ff2a33dc9be6cc7b1acb05536abf25
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ananthdurai/rustlearn:/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] bf06b4e6f1ddcb06fa889a5ede8b77b839a0b70b3852ad1d8c73679f5b6ef704
[INFO] running `"docker" "start" "-a" "bf06b4e6f1ddcb06fa889a5ede8b77b839a0b70b3852ad1d8c73679f5b6ef704"`
[INFO] [stderr]    Compiling rustlearn v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `"docker" "inspect" "bf06b4e6f1ddcb06fa889a5ede8b77b839a0b70b3852ad1d8c73679f5b6ef704"`
[INFO] running `"docker" "rm" "-f" "bf06b4e6f1ddcb06fa889a5ede8b77b839a0b70b3852ad1d8c73679f5b6ef704"`
[INFO] [stdout] bf06b4e6f1ddcb06fa889a5ede8b77b839a0b70b3852ad1d8c73679f5b6ef704
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ananthdurai/rustlearn:/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] 7f63c9aa50ce5a7bb645c1e701a94b2e1903f1ff9c679bdf66994e4dcd93da3d
[INFO] running `"docker" "start" "-a" "7f63c9aa50ce5a7bb645c1e701a94b2e1903f1ff9c679bdf66994e4dcd93da3d"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rustlearn-255bdc35a8411e0e
[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" "7f63c9aa50ce5a7bb645c1e701a94b2e1903f1ff9c679bdf66994e4dcd93da3d"`
[INFO] running `"docker" "rm" "-f" "7f63c9aa50ce5a7bb645c1e701a94b2e1903f1ff9c679bdf66994e4dcd93da3d"`
[INFO] [stdout] 7f63c9aa50ce5a7bb645c1e701a94b2e1903f1ff9c679bdf66994e4dcd93da3d