Dec 18 11:15:58.539 INFO checking shortcut-4.1.3 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 11:15:58.539 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/shortcut/4.1.3:/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 18 11:15:58.894 INFO [stdout] e987525dc3186e26b90d7e5a76395ac1362e6ae4138e37e86bd232eb504a02c2
Dec 18 11:15:58.908 INFO running `"docker" "start" "-a" "e987525dc3186e26b90d7e5a76395ac1362e6ae4138e37e86bd232eb504a02c2"`
Dec 18 11:16:00.059 INFO [stderr]     Checking shortcut v4.1.3 (/opt/crater/workdir)
Dec 18 11:16:00.492 INFO [stderr] warning: variable does not need to be mutable
Dec 18 11:16:00.492 INFO [stderr]   --> src/idx.rs:55:21
Dec 18 11:16:00.492 INFO [stderr]    |
Dec 18 11:16:00.492 INFO [stderr] 55 |         if let Some(mut l) = self.map.get_mut(key) {
Dec 18 11:16:00.492 INFO [stderr]    |                     ----^
Dec 18 11:16:00.492 INFO [stderr]    |                     |
Dec 18 11:16:00.492 INFO [stderr]    |                     help: remove this `mut`
Dec 18 11:16:00.492 INFO [stderr]    |
Dec 18 11:16:00.492 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 11:16:00.492 INFO [stderr] 
Dec 18 11:16:00.860 INFO [stderr] warning: variable does not need to be mutable
Dec 18 11:16:00.860 INFO [stderr]   --> src/idx.rs:55:21
Dec 18 11:16:00.860 INFO [stderr]    |
Dec 18 11:16:00.860 INFO [stderr] 55 |         if let Some(mut l) = self.map.get_mut(key) {
Dec 18 11:16:00.860 INFO [stderr]    |                     ----^
Dec 18 11:16:00.860 INFO [stderr]    |                     |
Dec 18 11:16:00.860 INFO [stderr]    |                     help: remove this `mut`
Dec 18 11:16:00.860 INFO [stderr]    |
Dec 18 11:16:00.860 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 11:16:00.860 INFO [stderr] 
Dec 18 11:16:01.176 INFO [stderr] error[E0308]: mismatched types
Dec 18 11:16:01.176 INFO [stderr]   --> benches/bench.rs:62:59
Dec 18 11:16:01.176 INFO [stderr]    |
Dec 18 11:16:01.176 INFO [stderr] 62 |             cmp: cmp::Comparison::Equal(cmp::Value::Const(format!("{}", i))),
Dec 18 11:16:01.176 INFO [stderr]    |                                                           ^^^^^^^^^^^^^^^^ expected enum `std::borrow::Cow`, found struct `std::string::String`
Dec 18 11:16:01.176 INFO [stderr]    |
Dec 18 11:16:01.176 INFO [stderr]    = note: expected type `std::borrow::Cow<'_, _>`
Dec 18 11:16:01.176 INFO [stderr]               found type `std::string::String`
Dec 18 11:16:01.176 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 11:16:01.176 INFO [stderr] 
Dec 18 11:16:01.192 INFO [stderr] error: aborting due to previous error
Dec 18 11:16:01.192 INFO [stderr] 
Dec 18 11:16:01.192 INFO [stderr] For more information about this error, try `rustc --explain E0308`.
Dec 18 11:16:01.196 INFO [stderr] error: Could not compile `shortcut`.
Dec 18 11:16:01.196 INFO [stderr] 
Dec 18 11:16:01.196 INFO [stderr] To learn more, run the command again with --verbose.
Dec 18 11:16:01.679 INFO running `"docker" "inspect" "e987525dc3186e26b90d7e5a76395ac1362e6ae4138e37e86bd232eb504a02c2"`
Dec 18 11:16:01.749 INFO running `"docker" "rm" "-f" "e987525dc3186e26b90d7e5a76395ac1362e6ae4138e37e86bd232eb504a02c2"`
Dec 18 11:16:01.853 INFO [stdout] e987525dc3186e26b90d7e5a76395ac1362e6ae4138e37e86bd232eb504a02c2