[INFO] updating cached repository MartinHowarth/petals_around_the_rose
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/MartinHowarth/petals_around_the_rose
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/MartinHowarth/petals_around_the_rose" "work/ex/beta-1.38-1/sources/1.37.0/gh/MartinHowarth/petals_around_the_rose"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/MartinHowarth/petals_around_the_rose'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/MartinHowarth/petals_around_the_rose" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/MartinHowarth/petals_around_the_rose"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/MartinHowarth/petals_around_the_rose'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 07c9f5fe1492656514dcbf1a0e874988007b0364
[INFO] sha for GitHub repo MartinHowarth/petals_around_the_rose: 07c9f5fe1492656514dcbf1a0e874988007b0364
[INFO] validating manifest of MartinHowarth/petals_around_the_rose 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 MartinHowarth/petals_around_the_rose 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 MartinHowarth/petals_around_the_rose
[INFO] finished frobbing MartinHowarth/petals_around_the_rose
[INFO] frobbed toml for MartinHowarth/petals_around_the_rose written to work/ex/beta-1.38-1/sources/1.37.0/gh/MartinHowarth/petals_around_the_rose/Cargo.toml
[INFO] started frobbing MartinHowarth/petals_around_the_rose
[INFO] finished frobbing MartinHowarth/petals_around_the_rose
[INFO] frobbed toml for MartinHowarth/petals_around_the_rose written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/MartinHowarth/petals_around_the_rose/Cargo.toml
[INFO] crate MartinHowarth/petals_around_the_rose 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 MartinHowarth/petals_around_the_rose 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/MartinHowarth/petals_around_the_rose:/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] 632bccede103c504478d4b9bbe29bd669f09251e4cb53c86928992e50491aeba
[INFO] running `"docker" "start" "-a" "632bccede103c504478d4b9bbe29bd669f09251e4cb53c86928992e50491aeba"`
[INFO] [stderr]    Compiling cute v0.3.0
[INFO] [stderr]    Compiling petals_around_the_rose v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:45:13
[INFO] [stderr]    |
[INFO] [stderr] 45 |         let mut f: fn(&mut i32) = match die {
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `"docker" "inspect" "632bccede103c504478d4b9bbe29bd669f09251e4cb53c86928992e50491aeba"`
[INFO] running `"docker" "rm" "-f" "632bccede103c504478d4b9bbe29bd669f09251e4cb53c86928992e50491aeba"`
[INFO] [stdout] 632bccede103c504478d4b9bbe29bd669f09251e4cb53c86928992e50491aeba
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/MartinHowarth/petals_around_the_rose:/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] 1d2400a8311fad79b87515b49ee52bf11f3564a5eab3fb8e686300aa410d0d04
[INFO] running `"docker" "start" "-a" "1d2400a8311fad79b87515b49ee52bf11f3564a5eab3fb8e686300aa410d0d04"`
[INFO] [stderr]    Compiling petals_around_the_rose v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:45:13
[INFO] [stderr]    |
[INFO] [stderr] 45 |         let mut f: fn(&mut i32) = match die {
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `"docker" "inspect" "1d2400a8311fad79b87515b49ee52bf11f3564a5eab3fb8e686300aa410d0d04"`
[INFO] running `"docker" "rm" "-f" "1d2400a8311fad79b87515b49ee52bf11f3564a5eab3fb8e686300aa410d0d04"`
[INFO] [stdout] 1d2400a8311fad79b87515b49ee52bf11f3564a5eab3fb8e686300aa410d0d04
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/MartinHowarth/petals_around_the_rose:/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] 9441e879d612f6b8a4885da41c98c79890c1ab322e348c83b022a2144f9a3ecc
[INFO] running `"docker" "start" "-a" "9441e879d612f6b8a4885da41c98c79890c1ab322e348c83b022a2144f9a3ecc"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/petals_around_the_rose-9433a5a18cb4e6b8
[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" "9441e879d612f6b8a4885da41c98c79890c1ab322e348c83b022a2144f9a3ecc"`
[INFO] running `"docker" "rm" "-f" "9441e879d612f6b8a4885da41c98c79890c1ab322e348c83b022a2144f9a3ecc"`
[INFO] [stdout] 9441e879d612f6b8a4885da41c98c79890c1ab322e348c83b022a2144f9a3ecc