[INFO] updating cached repository makos/rust-ls
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/makos/rust-ls
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/makos/rust-ls" "work/ex/beta-1.37-6/sources/1.36.0/gh/makos/rust-ls"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/makos/rust-ls'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/makos/rust-ls" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/makos/rust-ls"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/makos/rust-ls'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d208dbb34473661147939858a3a29a3f7195ad62
[INFO] sha for GitHub repo makos/rust-ls: d208dbb34473661147939858a3a29a3f7195ad62
[INFO] validating manifest of makos/rust-ls on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of makos/rust-ls on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing makos/rust-ls
[INFO] finished frobbing makos/rust-ls
[INFO] frobbed toml for makos/rust-ls written to work/ex/beta-1.37-6/sources/1.36.0/gh/makos/rust-ls/Cargo.toml
[INFO] started frobbing makos/rust-ls
[INFO] finished frobbing makos/rust-ls
[INFO] frobbed toml for makos/rust-ls written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/makos/rust-ls/Cargo.toml
[INFO] crate makos/rust-ls already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing makos/rust-ls against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/makos/rust-ls:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 58a06db9109036c3c838ae0f6a6d85609f8dee1d1abea01b97d0503e2fce6491
[INFO] running `"docker" "start" "-a" "58a06db9109036c3c838ae0f6a6d85609f8dee1d1abea01b97d0503e2fce6491"`
[INFO] [stderr]    Compiling rls v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 59 |         let mut dirs: Vec<Result<DirEntry, io::Error>> = dirs.collect();
[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 1.28s
[INFO] running `"docker" "inspect" "58a06db9109036c3c838ae0f6a6d85609f8dee1d1abea01b97d0503e2fce6491"`
[INFO] running `"docker" "rm" "-f" "58a06db9109036c3c838ae0f6a6d85609f8dee1d1abea01b97d0503e2fce6491"`
[INFO] [stdout] 58a06db9109036c3c838ae0f6a6d85609f8dee1d1abea01b97d0503e2fce6491
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/makos/rust-ls:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 9b05f8de1f12599406d8292596455ac215fdf3a91cafe7d4fed3dec50c4866f2
[INFO] running `"docker" "start" "-a" "9b05f8de1f12599406d8292596455ac215fdf3a91cafe7d4fed3dec50c4866f2"`
[INFO] [stderr]    Compiling rls v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 59 |         let mut dirs: Vec<Result<DirEntry, io::Error>> = dirs.collect();
[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 0.85s
[INFO] running `"docker" "inspect" "9b05f8de1f12599406d8292596455ac215fdf3a91cafe7d4fed3dec50c4866f2"`
[INFO] running `"docker" "rm" "-f" "9b05f8de1f12599406d8292596455ac215fdf3a91cafe7d4fed3dec50c4866f2"`
[INFO] [stdout] 9b05f8de1f12599406d8292596455ac215fdf3a91cafe7d4fed3dec50c4866f2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/makos/rust-ls:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 898c05c87d23231348334b142aa48fa353889befac95e67b7d074fd25be3a808
[INFO] running `"docker" "start" "-a" "898c05c87d23231348334b142aa48fa353889befac95e67b7d074fd25be3a808"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rls-d30a1e1888bbe58c
[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" "898c05c87d23231348334b142aa48fa353889befac95e67b7d074fd25be3a808"`
[INFO] running `"docker" "rm" "-f" "898c05c87d23231348334b142aa48fa353889befac95e67b7d074fd25be3a808"`
[INFO] [stdout] 898c05c87d23231348334b142aa48fa353889befac95e67b7d074fd25be3a808