[INFO] fetching crate gallop 1.0.4...
[INFO] checking gallop-1.0.4 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate gallop 1.0.4 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate gallop 1.0.4 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate gallop 1.0.4
[INFO] finished tweaking crates.io crate gallop 1.0.4
[INFO] tweaked toml for crates.io crate gallop 1.0.4 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c6c3d138c6ec4ec461c290ff6c145dae1e337468f0b0c7d5ce738c1fc5f67b24
[INFO] running `"docker" "start" "-a" "c6c3d138c6ec4ec461c290ff6c145dae1e337468f0b0c7d5ce738c1fc5f67b24"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking gallop v1.0.4 (/opt/rustwide/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 2.16s
[INFO] running `"docker" "inspect" "c6c3d138c6ec4ec461c290ff6c145dae1e337468f0b0c7d5ce738c1fc5f67b24"`
[INFO] running `"docker" "rm" "-f" "c6c3d138c6ec4ec461c290ff6c145dae1e337468f0b0c7d5ce738c1fc5f67b24"`
[INFO] [stdout] c6c3d138c6ec4ec461c290ff6c145dae1e337468f0b0c7d5ce738c1fc5f67b24