[INFO] updating cached repository matthiaskrgr/raca
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/matthiaskrgr/raca
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/matthiaskrgr/raca" "work/ex/beta-1.38-1/sources/1.37.0/gh/matthiaskrgr/raca"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/matthiaskrgr/raca'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/matthiaskrgr/raca" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/matthiaskrgr/raca"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/matthiaskrgr/raca'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ea9f9bf01fd3ac52d69d402620eb5f87162adaf0
[INFO] sha for GitHub repo matthiaskrgr/raca: ea9f9bf01fd3ac52d69d402620eb5f87162adaf0
[INFO] validating manifest of matthiaskrgr/raca 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 matthiaskrgr/raca 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 matthiaskrgr/raca
[INFO] finished frobbing matthiaskrgr/raca
[INFO] frobbed toml for matthiaskrgr/raca written to work/ex/beta-1.38-1/sources/1.37.0/gh/matthiaskrgr/raca/Cargo.toml
[INFO] started frobbing matthiaskrgr/raca
[INFO] finished frobbing matthiaskrgr/raca
[INFO] frobbed toml for matthiaskrgr/raca written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/matthiaskrgr/raca/Cargo.toml
[INFO] crate matthiaskrgr/raca 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 matthiaskrgr/raca 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/matthiaskrgr/raca:/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] c7cde466bda9955d74042e1c2b099a8ce68c8bfe8188d49fc45799f9008cc419
[INFO] running `"docker" "start" "-a" "c7cde466bda9955d74042e1c2b099a8ce68c8bfe8188d49fc45799f9008cc419"`
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling libssh2-sys v0.2.11
[INFO] [stderr]    Compiling curl-sys v0.4.18
[INFO] [stderr]    Compiling libgit2-sys v0.7.11
[INFO] [stderr]    Compiling filetime v0.2.4
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling serde_urlencoded v0.5.5
[INFO] [stderr]    Compiling flate2 v1.0.7
[INFO] [stderr]    Compiling publicsuffix v1.5.2
[INFO] [stderr]    Compiling tar v0.4.22
[INFO] [stderr]    Compiling cookie_store v0.5.1
[INFO] [stderr]    Compiling reqwest v0.9.15
[INFO] [stderr]    Compiling git2 v0.8.0
[INFO] [stderr]    Compiling raca v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:400:9
[INFO] [stderr]     |
[INFO] [stderr] 400 |     let mut c;
[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 1m 20s
[INFO] running `"docker" "inspect" "c7cde466bda9955d74042e1c2b099a8ce68c8bfe8188d49fc45799f9008cc419"`
[INFO] running `"docker" "rm" "-f" "c7cde466bda9955d74042e1c2b099a8ce68c8bfe8188d49fc45799f9008cc419"`
[INFO] [stdout] c7cde466bda9955d74042e1c2b099a8ce68c8bfe8188d49fc45799f9008cc419
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/matthiaskrgr/raca:/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] 0e6e17d4ff7721afc7f85514cc526da2251e1f6c464c150854c60c04d94fc3c3
[INFO] running `"docker" "start" "-a" "0e6e17d4ff7721afc7f85514cc526da2251e1f6c464c150854c60c04d94fc3c3"`
[INFO] [stderr]    Compiling raca v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:400:9
[INFO] [stderr]     |
[INFO] [stderr] 400 |     let mut c;
[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 2.67s
[INFO] running `"docker" "inspect" "0e6e17d4ff7721afc7f85514cc526da2251e1f6c464c150854c60c04d94fc3c3"`
[INFO] running `"docker" "rm" "-f" "0e6e17d4ff7721afc7f85514cc526da2251e1f6c464c150854c60c04d94fc3c3"`
[INFO] [stdout] 0e6e17d4ff7721afc7f85514cc526da2251e1f6c464c150854c60c04d94fc3c3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/matthiaskrgr/raca:/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] 4b421a70cc3332f236e7449d369e2e85165f4ee65acdc660d6579cb0b3ac35ff
[INFO] running `"docker" "start" "-a" "4b421a70cc3332f236e7449d369e2e85165f4ee65acdc660d6579cb0b3ac35ff"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/raca-3d05b31ca73990da
[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" "4b421a70cc3332f236e7449d369e2e85165f4ee65acdc660d6579cb0b3ac35ff"`
[INFO] running `"docker" "rm" "-f" "4b421a70cc3332f236e7449d369e2e85165f4ee65acdc660d6579cb0b3ac35ff"`
[INFO] [stdout] 4b421a70cc3332f236e7449d369e2e85165f4ee65acdc660d6579cb0b3ac35ff