[INFO] cloning repository cowpig/go_rusty
[INFO] running `"git" "clone" "--bare" "git://github.com/cowpig/go_rusty.git" "work/cache/sources/gh/cowpig/go_rusty"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/cowpig/go_rusty'...
[INFO] running `"git" "clone" "work/cache/sources/gh/cowpig/go_rusty" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/cowpig/go_rusty"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/cowpig/go_rusty'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cowpig/go_rusty" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/cowpig/go_rusty"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/cowpig/go_rusty'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a8d7066d092fbc5dfab6974b9b22d4a519bcb7a4
[INFO] sha for GitHub repo cowpig/go_rusty: a8d7066d092fbc5dfab6974b9b22d4a519bcb7a4
[INFO] validating manifest of cowpig/go_rusty on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cowpig/go_rusty on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cowpig/go_rusty
[INFO] finished frobbing cowpig/go_rusty
[INFO] frobbed toml for cowpig/go_rusty written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/cowpig/go_rusty/Cargo.toml
[INFO] started frobbing cowpig/go_rusty
[INFO] finished frobbing cowpig/go_rusty
[INFO] frobbed toml for cowpig/go_rusty written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/cowpig/go_rusty/Cargo.toml
[INFO] crate cowpig/go_rusty already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking cowpig/go_rusty against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-1/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/cowpig/go_rusty:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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=forbid" "-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" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1b1dc04bbbafc33bd6fdfd4b2b3d9ffc869f088e2ae45e0cea54888eb05318e6
[INFO] running `"docker" "start" "-a" "1b1dc04bbbafc33bd6fdfd4b2b3d9ffc869f088e2ae45e0cea54888eb05318e6"`
[INFO] [stderr]     Checking go v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/board.rs:67:25
[INFO] [stderr]    |
[INFO] [stderr] 67 |             if let Some(mut captures) = self.get_captures(
[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] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/board.rs:67:25
[INFO] [stderr]    |
[INFO] [stderr] 67 |             if let Some(mut captures) = self.get_captures(
[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" "1b1dc04bbbafc33bd6fdfd4b2b3d9ffc869f088e2ae45e0cea54888eb05318e6"`
[INFO] running `"docker" "rm" "-f" "1b1dc04bbbafc33bd6fdfd4b2b3d9ffc869f088e2ae45e0cea54888eb05318e6"`
[INFO] [stdout] 1b1dc04bbbafc33bd6fdfd4b2b3d9ffc869f088e2ae45e0cea54888eb05318e6