[INFO] crate gallop 1.0.4 is already in cache
[INFO] extracting crate gallop 1.0.4 into work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/gallop/1.0.4
[INFO] extracting crate gallop 1.0.4 into work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/reg/gallop/1.0.4
[INFO] validating manifest of gallop-1.0.4 on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of gallop-1.0.4 on toolchain try#99a7498759a22b5684caf798a98b7e90ad9d2443
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing gallop-1.0.4
[INFO] finished frobbing gallop-1.0.4
[INFO] frobbed toml for gallop-1.0.4 written to work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/gallop/1.0.4/Cargo.toml
[INFO] started frobbing gallop-1.0.4
[INFO] finished frobbing gallop-1.0.4
[INFO] frobbed toml for gallop-1.0.4 written to work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/reg/gallop/1.0.4/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking gallop-1.0.4 against master#e305df1846a6d985315917ae0c81b74af8b4e641 for pr-60039-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039-1/worker-0/master#e305df1846a6d985315917ae0c81b74af8b4e641:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/gallop/1.0.4:/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" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a9cc75963e8453a162d2c96bf121554a22571cd14e2b702e2dcb5aea325fd7aa
[INFO] running `"docker" "start" "-a" "a9cc75963e8453a162d2c96bf121554a22571cd14e2b702e2dcb5aea325fd7aa"`
[INFO] [stderr]     Checking gallop v1.0.4 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:570:21
[INFO] [stderr]     |
[INFO] [stderr] 570 |                 let mut current_children = children;
[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/lib.rs:712:41
[INFO] [stderr]     |
[INFO] [stderr] 712 |                                     let mut first_non_terminal = first_set.get_mut(non_terminal).unwrap();
[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/lib.rs:735:29
[INFO] [stderr]     |
[INFO] [stderr] 735 |                         let mut first_non_terminal = first_set.get_mut(non_terminal).unwrap();
[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/lib.rs:784:33
[INFO] [stderr]     |
[INFO] [stderr] 784 |                             let mut follow_rule_element_b = follow_set.get_mut(&b).unwrap();
[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/lib.rs:570:21
[INFO] [stderr]     |
[INFO] [stderr] 570 |                 let mut current_children = children;
[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/lib.rs:712:41
[INFO] [stderr]     |
[INFO] [stderr] 712 |                                     let mut first_non_terminal = first_set.get_mut(non_terminal).unwrap();
[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/lib.rs:735:29
[INFO] [stderr]     |
[INFO] [stderr] 735 |                         let mut first_non_terminal = first_set.get_mut(non_terminal).unwrap();
[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/lib.rs:784:33
[INFO] [stderr]     |
[INFO] [stderr] 784 |                             let mut follow_rule_element_b = follow_set.get_mut(&b).unwrap();
[INFO] [stderr]     |                                 ----^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                                 |
[INFO] [stderr]     |                                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.01s
[INFO] running `"docker" "inspect" "a9cc75963e8453a162d2c96bf121554a22571cd14e2b702e2dcb5aea325fd7aa"`
[INFO] running `"docker" "rm" "-f" "a9cc75963e8453a162d2c96bf121554a22571cd14e2b702e2dcb5aea325fd7aa"`
[INFO] [stdout] a9cc75963e8453a162d2c96bf121554a22571cd14e2b702e2dcb5aea325fd7aa