[INFO] fetching crate grep-printer 0.1.2...
[INFO] extracting crate grep-printer 0.1.2 into work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/grep-printer/0.1.2
[INFO] extracting crate grep-printer 0.1.2 into work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/grep-printer/0.1.2
[INFO] validating manifest of grep-printer-0.1.2 on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of grep-printer-0.1.2 on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing grep-printer-0.1.2
[INFO] finished frobbing grep-printer-0.1.2
[INFO] frobbed toml for grep-printer-0.1.2 written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/grep-printer/0.1.2/Cargo.toml
[INFO] started frobbing grep-printer-0.1.2
[INFO] finished frobbing grep-printer-0.1.2
[INFO] frobbed toml for grep-printer-0.1.2 written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/grep-printer/0.1.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking grep-printer-0.1.2 against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-1/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/grep-printer/0.1.2:/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=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" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 83612ab6345d5ce8e969e0f3f69fcbf009f8e77b19558168ce4bc4d6c0ba2c61
[INFO] running `"docker" "start" "-a" "83612ab6345d5ce8e969e0f3f69fcbf009f8e77b19558168ce4bc4d6c0ba2c61"`
[INFO] [stderr]     Checking grep-searcher v0.1.5
[INFO] [stderr]     Checking grep-printer v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/standard.rs:1032:17
[INFO] [stderr]      |
[INFO] [stderr] 1032 |             let mut line = Match::new(start, end);
[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/standard.rs:1108:17
[INFO] [stderr]      |
[INFO] [stderr] 1108 |             let mut m = m;
[INFO] [stderr]      |                 ----^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/standard.rs:1032:17
[INFO] [stderr]      |
[INFO] [stderr] 1032 |             let mut line = Match::new(start, end);
[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/standard.rs:1108:17
[INFO] [stderr]      |
[INFO] [stderr] 1108 |             let mut m = m;
[INFO] [stderr]      |                 ----^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.15s
[INFO] running `"docker" "inspect" "83612ab6345d5ce8e969e0f3f69fcbf009f8e77b19558168ce4bc4d6c0ba2c61"`
[INFO] running `"docker" "rm" "-f" "83612ab6345d5ce8e969e0f3f69fcbf009f8e77b19558168ce4bc4d6c0ba2c61"`
[INFO] [stdout] 83612ab6345d5ce8e969e0f3f69fcbf009f8e77b19558168ce4bc4d6c0ba2c61