[INFO] updating cached repository lowks/gettingrusty
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lowks/gettingrusty
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lowks/gettingrusty" "work/ex/beta-1.38-1/sources/1.37.0/gh/lowks/gettingrusty"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/lowks/gettingrusty'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lowks/gettingrusty" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lowks/gettingrusty"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lowks/gettingrusty'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6c793a1888c8b5ef702b8ea63e1e91c9084c7e9a
[INFO] sha for GitHub repo lowks/gettingrusty: 6c793a1888c8b5ef702b8ea63e1e91c9084c7e9a
[INFO] validating manifest of lowks/gettingrusty 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 lowks/gettingrusty 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 lowks/gettingrusty
[INFO] finished frobbing lowks/gettingrusty
[INFO] frobbed toml for lowks/gettingrusty written to work/ex/beta-1.38-1/sources/1.37.0/gh/lowks/gettingrusty/Cargo.toml
[INFO] started frobbing lowks/gettingrusty
[INFO] finished frobbing lowks/gettingrusty
[INFO] frobbed toml for lowks/gettingrusty written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lowks/gettingrusty/Cargo.toml
[INFO] crate lowks/gettingrusty 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 lowks/gettingrusty against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lowks/gettingrusty:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] ee9e9947c54e3e0b44ed0eed01590088ba8dfecd5493b892d3490939fa558a2f
[INFO] running `"docker" "start" "-a" "ee9e9947c54e3e0b44ed0eed01590088ba8dfecd5493b892d3490939fa558a2f"`
[INFO] [stderr]    Compiling gettingrusty v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> src/semicolons.rs:13:7
[INFO] [stderr]    |
[INFO] [stderr] 13 |             2 * m;
[INFO] [stderr]    |             ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.45s
[INFO] running `"docker" "inspect" "ee9e9947c54e3e0b44ed0eed01590088ba8dfecd5493b892d3490939fa558a2f"`
[INFO] running `"docker" "rm" "-f" "ee9e9947c54e3e0b44ed0eed01590088ba8dfecd5493b892d3490939fa558a2f"`
[INFO] [stdout] ee9e9947c54e3e0b44ed0eed01590088ba8dfecd5493b892d3490939fa558a2f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lowks/gettingrusty:/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 3c6e2af08843d7c3fef19bc8d424bd7c999653bdbeeef65e8de0bef7e1cc2b2d
[INFO] running `"docker" "start" "-a" "3c6e2af08843d7c3fef19bc8d424bd7c999653bdbeeef65e8de0bef7e1cc2b2d"`
[INFO] [stderr]    Compiling gettingrusty v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> src/semicolons.rs:13:7
[INFO] [stderr]    |
[INFO] [stderr] 13 |             2 * m;
[INFO] [stderr]    |             ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `"docker" "inspect" "3c6e2af08843d7c3fef19bc8d424bd7c999653bdbeeef65e8de0bef7e1cc2b2d"`
[INFO] running `"docker" "rm" "-f" "3c6e2af08843d7c3fef19bc8d424bd7c999653bdbeeef65e8de0bef7e1cc2b2d"`
[INFO] [stdout] 3c6e2af08843d7c3fef19bc8d424bd7c999653bdbeeef65e8de0bef7e1cc2b2d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lowks/gettingrusty:/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] dc7d992164f9215a6ae9586de74b90ccd7e0cbba8a93b1a18cd700aa355ea53f
[INFO] running `"docker" "start" "-a" "dc7d992164f9215a6ae9586de74b90ccd7e0cbba8a93b1a18cd700aa355ea53f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/gettingrusty-6d603bcf144545bf
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test functional::test_functional ... ok
[INFO] [stdout] test conditionals::test_conditionals ... ok
[INFO] [stdout] test guard_clause::test_pattern_m ... ok
[INFO] [stdout] test pattern_match::test_pattern_m ... ok
[INFO] [stdout] test string::test_string_capacity ... ok
[INFO] [stdout] test semicolons::test_expr ... ok
[INFO] [stdout] test string::test_push_string ... ok
[INFO] [stdout] test matching::test_matching ... ok
[INFO] [stdout] test string::test_replace ... ok
[INFO] [stdout] test string::test_truncate ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "dc7d992164f9215a6ae9586de74b90ccd7e0cbba8a93b1a18cd700aa355ea53f"`
[INFO] running `"docker" "rm" "-f" "dc7d992164f9215a6ae9586de74b90ccd7e0cbba8a93b1a18cd700aa355ea53f"`
[INFO] [stdout] dc7d992164f9215a6ae9586de74b90ccd7e0cbba8a93b1a18cd700aa355ea53f