[INFO] updating cached repository sampullman/rust-scheme
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sampullman/rust-scheme
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sampullman/rust-scheme" "work/ex/pr-60932/sources/master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4/gh/sampullman/rust-scheme"`
[INFO] [stderr] Cloning into 'work/ex/pr-60932/sources/master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4/gh/sampullman/rust-scheme'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sampullman/rust-scheme" "work/ex/pr-60932/sources/try#097e26225c5cc28d3042ad4c80eac7c488f78ee7/gh/sampullman/rust-scheme"`
[INFO] [stderr] Cloning into 'work/ex/pr-60932/sources/try#097e26225c5cc28d3042ad4c80eac7c488f78ee7/gh/sampullman/rust-scheme'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f9bd7aa53c119bf21693606a480d7bc76c18badb
[INFO] sha for GitHub repo sampullman/rust-scheme: f9bd7aa53c119bf21693606a480d7bc76c18badb
[INFO] validating manifest of sampullman/rust-scheme on toolchain master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+548add7f61bfcbe3bea3f5ccefb53c84da8fefe4-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sampullman/rust-scheme on toolchain try#097e26225c5cc28d3042ad4c80eac7c488f78ee7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+097e26225c5cc28d3042ad4c80eac7c488f78ee7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sampullman/rust-scheme
[INFO] finished frobbing sampullman/rust-scheme
[INFO] frobbed toml for sampullman/rust-scheme written to work/ex/pr-60932/sources/master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4/gh/sampullman/rust-scheme/Cargo.toml
[INFO] started frobbing sampullman/rust-scheme
[INFO] finished frobbing sampullman/rust-scheme
[INFO] frobbed toml for sampullman/rust-scheme written to work/ex/pr-60932/sources/try#097e26225c5cc28d3042ad4c80eac7c488f78ee7/gh/sampullman/rust-scheme/Cargo.toml
[INFO] crate sampullman/rust-scheme already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+548add7f61bfcbe3bea3f5ccefb53c84da8fefe4-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+097e26225c5cc28d3042ad4c80eac7c488f78ee7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking sampullman/rust-scheme against master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4 for pr-60932
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60932/worker-7/master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60932/sources/master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4/gh/sampullman/rust-scheme:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+548add7f61bfcbe3bea3f5ccefb53c84da8fefe4-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ede4cf88d11ff30231fc3ce8a5f8a942dc5c4b18d8fd095a209081b9d673c7a2
[INFO] running `"docker" "start" "-a" "ede4cf88d11ff30231fc3ce8a5f8a942dc5c4b18d8fd095a209081b9d673c7a2"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Checking rust-scheme v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/parse.rs:29:14
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn read_list(mut tokens: &mut Vec<String>) -> Result<Vec<Atom>, String> {
[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/parse.rs:43:25
[INFO] [stderr]    |
[INFO] [stderr] 43 | pub fn read_from_tokens(mut tokens: &mut Vec<String>) -> Result<Atom, String> {
[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/parse.rs:29:14
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn read_list(mut tokens: &mut Vec<String>) -> Result<Vec<Atom>, String> {
[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/parse.rs:43:25
[INFO] [stderr]    |
[INFO] [stderr] 43 | pub fn read_from_tokens(mut tokens: &mut Vec<String>) -> Result<Atom, String> {
[INFO] [stderr]    |                         ----^^^^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.34s
[INFO] running `"docker" "inspect" "ede4cf88d11ff30231fc3ce8a5f8a942dc5c4b18d8fd095a209081b9d673c7a2"`
[INFO] running `"docker" "rm" "-f" "ede4cf88d11ff30231fc3ce8a5f8a942dc5c4b18d8fd095a209081b9d673c7a2"`
[INFO] [stdout] ede4cf88d11ff30231fc3ce8a5f8a942dc5c4b18d8fd095a209081b9d673c7a2