[INFO] updating cached repository leviathan88/learning-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/leviathan88/learning-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/leviathan88/learning-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/leviathan88/learning-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/leviathan88/learning-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/leviathan88/learning-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/leviathan88/learning-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/leviathan88/learning-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e0d1d56441ec730a685fdda56ddeb44da5f4bb23
[INFO] sha for GitHub repo leviathan88/learning-rust: e0d1d56441ec730a685fdda56ddeb44da5f4bb23
[INFO] validating manifest of leviathan88/learning-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 leviathan88/learning-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 leviathan88/learning-rust
[INFO] finished frobbing leviathan88/learning-rust
[INFO] frobbed toml for leviathan88/learning-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/leviathan88/learning-rust/Cargo.toml
[INFO] started frobbing leviathan88/learning-rust
[INFO] finished frobbing leviathan88/learning-rust
[INFO] frobbed toml for leviathan88/learning-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/leviathan88/learning-rust/Cargo.toml
[INFO] crate leviathan88/learning-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 leviathan88/learning-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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/leviathan88/learning-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] c50d1a7328b60071d6e565db65fa4ec0945fcb8edfa82cc7ed2b1ca57668096a
[INFO] running `"docker" "start" "-a" "c50d1a7328b60071d6e565db65fa4ec0945fcb8edfa82cc7ed2b1ca57668096a"`
[INFO] [stderr]    Compiling learning-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `gcd`
[INFO] [stderr]  --> src/main.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn gcd(mut n: u64, mut m: u64) -> u64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `"docker" "inspect" "c50d1a7328b60071d6e565db65fa4ec0945fcb8edfa82cc7ed2b1ca57668096a"`
[INFO] running `"docker" "rm" "-f" "c50d1a7328b60071d6e565db65fa4ec0945fcb8edfa82cc7ed2b1ca57668096a"`
[INFO] [stdout] c50d1a7328b60071d6e565db65fa4ec0945fcb8edfa82cc7ed2b1ca57668096a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/leviathan88/learning-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] fd4bcc5864ddb3266ae0b5689e64e8d2439edee6cb0fdf9355ecb055e2c80d76
[INFO] running `"docker" "start" "-a" "fd4bcc5864ddb3266ae0b5689e64e8d2439edee6cb0fdf9355ecb055e2c80d76"`
[INFO] [stderr]    Compiling learning-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `"docker" "inspect" "fd4bcc5864ddb3266ae0b5689e64e8d2439edee6cb0fdf9355ecb055e2c80d76"`
[INFO] running `"docker" "rm" "-f" "fd4bcc5864ddb3266ae0b5689e64e8d2439edee6cb0fdf9355ecb055e2c80d76"`
[INFO] [stdout] fd4bcc5864ddb3266ae0b5689e64e8d2439edee6cb0fdf9355ecb055e2c80d76
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/leviathan88/learning-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] 6d115c8c92839573f5675dca62dcbd4b9ea7df36af2888270d44ec47d15f273e
[INFO] running `"docker" "start" "-a" "6d115c8c92839573f5675dca62dcbd4b9ea7df36af2888270d44ec47d15f273e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/learning_rust-667f8aaa7937ac71
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_gcd ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "6d115c8c92839573f5675dca62dcbd4b9ea7df36af2888270d44ec47d15f273e"`
[INFO] running `"docker" "rm" "-f" "6d115c8c92839573f5675dca62dcbd4b9ea7df36af2888270d44ec47d15f273e"`
[INFO] [stdout] 6d115c8c92839573f5675dca62dcbd4b9ea7df36af2888270d44ec47d15f273e