Dec 11 10:11:38.110 INFO checking sampullman/rust-scheme against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 10:11:38.110 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-2/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +aa9aa79c3c583aab59ac9134542d60a780c35e2e-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 11 10:11:38.776 INFO [stdout] 77b268fa891af534d852c4051954647c5526dfa914c3c5e91fb4cc4b2daf83fd
Dec 11 10:11:38.779 INFO running `"docker" "start" "-a" "77b268fa891af534d852c4051954647c5526dfa914c3c5e91fb4cc4b2daf83fd"`
Dec 11 10:11:41.100 INFO [stderr] usermod: no changes
Dec 11 10:11:41.196 INFO [stderr]     Checking rust-scheme v0.1.0 (/source)
Dec 11 10:11:42.224 INFO [stderr] warning: variable does not need to be mutable
Dec 11 10:11:42.224 INFO [stderr]   --> src/parse.rs:29:14
Dec 11 10:11:42.224 INFO [stderr]    |
Dec 11 10:11:42.224 INFO [stderr] 29 | fn read_list(mut tokens: &mut Vec<String>) -> Result<Vec<Atom>, String> {
Dec 11 10:11:42.224 INFO [stderr]    |              ----^^^^^^
Dec 11 10:11:42.224 INFO [stderr]    |              |
Dec 11 10:11:42.224 INFO [stderr]    |              help: remove this `mut`
Dec 11 10:11:42.224 INFO [stderr]    |
Dec 11 10:11:42.224 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 10:11:42.224 INFO [stderr] 
Dec 11 10:11:42.224 INFO [stderr] warning: variable does not need to be mutable
Dec 11 10:11:42.224 INFO [stderr]   --> src/parse.rs:43:25
Dec 11 10:11:42.224 INFO [stderr]    |
Dec 11 10:11:42.224 INFO [stderr] 43 | pub fn read_from_tokens(mut tokens: &mut Vec<String>) -> Result<Atom, String> {
Dec 11 10:11:42.224 INFO [stderr]    |                         ----^^^^^^
Dec 11 10:11:42.224 INFO [stderr]    |                         |
Dec 11 10:11:42.224 INFO [stderr]    |                         help: remove this `mut`
Dec 11 10:11:42.224 INFO [stderr] 
Dec 11 10:11:42.256 INFO [stderr] warning: variable does not need to be mutable
Dec 11 10:11:42.256 INFO [stderr]   --> src/parse.rs:29:14
Dec 11 10:11:42.256 INFO [stderr]    |
Dec 11 10:11:42.256 INFO [stderr] 29 | fn read_list(mut tokens: &mut Vec<String>) -> Result<Vec<Atom>, String> {
Dec 11 10:11:42.256 INFO [stderr]    |              ----^^^^^^
Dec 11 10:11:42.256 INFO [stderr]    |              |
Dec 11 10:11:42.256 INFO [stderr]    |              help: remove this `mut`
Dec 11 10:11:42.256 INFO [stderr]    |
Dec 11 10:11:42.256 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 10:11:42.256 INFO [stderr] 
Dec 11 10:11:42.268 INFO [stderr] warning: variable does not need to be mutable
Dec 11 10:11:42.268 INFO [stderr]   --> src/parse.rs:43:25
Dec 11 10:11:42.268 INFO [stderr]    |
Dec 11 10:11:42.268 INFO [stderr] 43 | pub fn read_from_tokens(mut tokens: &mut Vec<String>) -> Result<Atom, String> {
Dec 11 10:11:42.268 INFO [stderr]    |                         ----^^^^^^
Dec 11 10:11:42.268 INFO [stderr]    |                         |
Dec 11 10:11:42.268 INFO [stderr]    |                         help: remove this `mut`
Dec 11 10:11:42.268 INFO [stderr] 
Dec 11 10:11:43.026 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.88s
Dec 11 10:11:43.028 INFO [stderr] su: No module specific data is present
Dec 11 10:11:44.678 INFO running `"docker" "inspect" "77b268fa891af534d852c4051954647c5526dfa914c3c5e91fb4cc4b2daf83fd"`
Dec 11 10:11:44.990 INFO running `"docker" "rm" "-f" "77b268fa891af534d852c4051954647c5526dfa914c3c5e91fb4cc4b2daf83fd"`
Dec 11 10:11:45.356 INFO [stdout] 77b268fa891af534d852c4051954647c5526dfa914c3c5e91fb4cc4b2daf83fd