Dec 17 16:10:17.029 INFO checking sampullman/rust-scheme against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 16:10:17.029 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/sampullman/rust-scheme:/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 16:10:17.646 INFO [stdout] 75326fbd3a9a0ac88e4ff4a1002227eb51e8c5530c39c50f6aeaef516ec9da18
Dec 17 16:10:17.658 INFO running `"docker" "start" "-a" "75326fbd3a9a0ac88e4ff4a1002227eb51e8c5530c39c50f6aeaef516ec9da18"`
Dec 17 16:10:20.421 INFO [stderr]     Checking rust-scheme v0.1.0 (/opt/crater/workdir)
Dec 17 16:10:21.132 INFO [stderr] warning: variable does not need to be mutable
Dec 17 16:10:21.132 INFO [stderr]   --> src/parse.rs:29:14
Dec 17 16:10:21.132 INFO [stderr]    |
Dec 17 16:10:21.132 INFO [stderr] 29 | fn read_list(mut tokens: &mut Vec<String>) -> Result<Vec<Atom>, String> {
Dec 17 16:10:21.132 INFO [stderr]    |              ----^^^^^^
Dec 17 16:10:21.132 INFO [stderr]    |              |
Dec 17 16:10:21.132 INFO [stderr]    |              help: remove this `mut`
Dec 17 16:10:21.132 INFO [stderr]    |
Dec 17 16:10:21.132 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 16:10:21.132 INFO [stderr] 
Dec 17 16:10:21.132 INFO [stderr] warning: variable does not need to be mutable
Dec 17 16:10:21.132 INFO [stderr]   --> src/parse.rs:43:25
Dec 17 16:10:21.132 INFO [stderr]    |
Dec 17 16:10:21.132 INFO [stderr] 43 | pub fn read_from_tokens(mut tokens: &mut Vec<String>) -> Result<Atom, String> {
Dec 17 16:10:21.132 INFO [stderr]    |                         ----^^^^^^
Dec 17 16:10:21.132 INFO [stderr]    |                         |
Dec 17 16:10:21.132 INFO [stderr]    |                         help: remove this `mut`
Dec 17 16:10:21.132 INFO [stderr] 
Dec 17 16:10:21.133 INFO [stderr] warning: variable does not need to be mutable
Dec 17 16:10:21.133 INFO [stderr]   --> src/parse.rs:29:14
Dec 17 16:10:21.133 INFO [stderr]    |
Dec 17 16:10:21.133 INFO [stderr] 29 | fn read_list(mut tokens: &mut Vec<String>) -> Result<Vec<Atom>, String> {
Dec 17 16:10:21.133 INFO [stderr]    |              ----^^^^^^
Dec 17 16:10:21.134 INFO [stderr]    |              |
Dec 17 16:10:21.134 INFO [stderr]    |              help: remove this `mut`
Dec 17 16:10:21.134 INFO [stderr]    |
Dec 17 16:10:21.134 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 16:10:21.134 INFO [stderr] 
Dec 17 16:10:21.134 INFO [stderr] warning: variable does not need to be mutable
Dec 17 16:10:21.135 INFO [stderr]   --> src/parse.rs:43:25
Dec 17 16:10:21.140 INFO [stderr]    |
Dec 17 16:10:21.140 INFO [stderr] 43 | pub fn read_from_tokens(mut tokens: &mut Vec<String>) -> Result<Atom, String> {
Dec 17 16:10:21.140 INFO [stderr]    |                         ----^^^^^^
Dec 17 16:10:21.140 INFO [stderr]    |                         |
Dec 17 16:10:21.140 INFO [stderr]    |                         help: remove this `mut`
Dec 17 16:10:21.140 INFO [stderr] 
Dec 17 16:10:21.896 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.50s
Dec 17 16:10:23.380 INFO running `"docker" "inspect" "75326fbd3a9a0ac88e4ff4a1002227eb51e8c5530c39c50f6aeaef516ec9da18"`
Dec 17 16:10:23.652 INFO running `"docker" "rm" "-f" "75326fbd3a9a0ac88e4ff4a1002227eb51e8c5530c39c50f6aeaef516ec9da18"`
Dec 17 16:10:23.952 INFO [stdout] 75326fbd3a9a0ac88e4ff4a1002227eb51e8c5530c39c50f6aeaef516ec9da18