Dec 17 13:12:16.866 INFO checking travisbhartwell/rbasic against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 13:12:16.866 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/travisbhartwell/rbasic:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 13:12:17.361 INFO [stdout] 4edd83e10fd3e2fb0460e42c24daed0ab7e01f489d5f4a69bd58fb603cacec3f
Dec 17 13:12:17.363 INFO running `"docker" "start" "-a" "4edd83e10fd3e2fb0460e42c24daed0ab7e01f489d5f4a69bd58fb603cacec3f"`
Dec 17 13:12:19.642 INFO [stderr]     Checking itertools v0.5.8
Dec 17 13:12:21.134 INFO [stderr]     Checking rbasic v0.1.0 (/opt/crater/workdir)
Dec 17 13:12:21.801 INFO [stderr] warning: variable does not need to be mutable
Dec 17 13:12:21.801 INFO [stderr]    --> src/evaluator.rs:209:21
Dec 17 13:12:21.801 INFO [stderr]     |
Dec 17 13:12:21.801 INFO [stderr] 209 | fn parse_expression(mut token_iter: &mut Peekable<Iter<lexer::TokenAndPos>>)
Dec 17 13:12:21.802 INFO [stderr]     |                     ----^^^^^^^^^^
Dec 17 13:12:21.802 INFO [stderr]     |                     |
Dec 17 13:12:21.802 INFO [stderr]     |                     help: remove this `mut`
Dec 17 13:12:21.802 INFO [stderr]     |
Dec 17 13:12:21.802 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 17 13:12:21.803 INFO [stderr] 
Dec 17 13:12:21.803 INFO [stderr] warning: variable does not need to be mutable
Dec 17 13:12:21.803 INFO [stderr]    --> src/evaluator.rs:271:34
Dec 17 13:12:21.803 INFO [stderr]     |
Dec 17 13:12:21.803 INFO [stderr] 271 | fn parse_and_eval_expression<'a>(mut token_iter: &mut Peekable<Iter<'a, lexer::TokenAndPos>>,
Dec 17 13:12:21.804 INFO [stderr]     |                                  ----^^^^^^^^^^
Dec 17 13:12:21.804 INFO [stderr]     |                                  |
Dec 17 13:12:21.804 INFO [stderr]     |                                  help: remove this `mut`
Dec 17 13:12:21.804 INFO [stderr] 
Dec 17 13:12:21.836 INFO [stderr] warning: variable does not need to be mutable
Dec 17 13:12:21.837 INFO [stderr]    --> src/evaluator.rs:209:21
Dec 17 13:12:21.837 INFO [stderr]     |
Dec 17 13:12:21.837 INFO [stderr] 209 | fn parse_expression(mut token_iter: &mut Peekable<Iter<lexer::TokenAndPos>>)
Dec 17 13:12:21.837 INFO [stderr]     |                     ----^^^^^^^^^^
Dec 17 13:12:21.838 INFO [stderr]     |                     |
Dec 17 13:12:21.838 INFO [stderr]     |                     help: remove this `mut`
Dec 17 13:12:21.838 INFO [stderr]     |
Dec 17 13:12:21.838 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 17 13:12:21.838 INFO [stderr] 
Dec 17 13:12:21.844 INFO [stderr] warning: variable does not need to be mutable
Dec 17 13:12:21.845 INFO [stderr]    --> src/evaluator.rs:271:34
Dec 17 13:12:21.845 INFO [stderr]     |
Dec 17 13:12:21.845 INFO [stderr] 271 | fn parse_and_eval_expression<'a>(mut token_iter: &mut Peekable<Iter<'a, lexer::TokenAndPos>>,
Dec 17 13:12:21.845 INFO [stderr]     |                                  ----^^^^^^^^^^
Dec 17 13:12:21.846 INFO [stderr]     |                                  |
Dec 17 13:12:21.846 INFO [stderr]     |                                  help: remove this `mut`
Dec 17 13:12:21.846 INFO [stderr] 
Dec 17 13:12:22.609 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.00s
Dec 17 13:12:24.142 INFO running `"docker" "inspect" "4edd83e10fd3e2fb0460e42c24daed0ab7e01f489d5f4a69bd58fb603cacec3f"`
Dec 17 13:12:24.448 INFO running `"docker" "rm" "-f" "4edd83e10fd3e2fb0460e42c24daed0ab7e01f489d5f4a69bd58fb603cacec3f"`
Dec 17 13:12:24.764 INFO [stdout] 4edd83e10fd3e2fb0460e42c24daed0ab7e01f489d5f4a69bd58fb603cacec3f