Dec 12 11:47:53.509 INFO checking lru2-0.1.0 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 11:47:53.509 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-7/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 12 11:47:53.692 INFO [stdout] 758d3c8b18955a71024a7e262d735edb8aa736edbea66334b5d9510a6284162a
Dec 12 11:47:53.695 INFO running `"docker" "start" "-a" "758d3c8b18955a71024a7e262d735edb8aa736edbea66334b5d9510a6284162a"`
Dec 12 11:47:54.036 INFO [stderr] usermod: no changes
Dec 12 11:47:54.085 INFO [stderr]     Checking lru2 v0.1.0 (/source)
Dec 12 11:47:54.580 INFO [stderr] warning: variable does not need to be mutable
Dec 12 11:47:54.580 INFO [stderr]   --> src/cache/mod.rs:57:13
Dec 12 11:47:54.580 INFO [stderr]    |
Dec 12 11:47:54.580 INFO [stderr] 57 |         let mut cache: &mut Register<C::LowerKey, C::Payload> = unsafe{ &mut **self.register.get(upper_key).unwrap() };
Dec 12 11:47:54.627 INFO [stderr]    |             ----^^^^^
Dec 12 11:47:54.627 INFO [stderr]    |             |
Dec 12 11:47:54.627 INFO [stderr]    |             help: remove this `mut`
Dec 12 11:47:54.627 INFO [stderr]    |
Dec 12 11:47:54.627 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 11:47:54.627 INFO [stderr] 
Dec 12 11:47:54.929 INFO [stderr] warning: variable does not need to be mutable
Dec 12 11:47:54.929 INFO [stderr]   --> src/cache/mod.rs:57:13
Dec 12 11:47:54.929 INFO [stderr]    |
Dec 12 11:47:54.929 INFO [stderr] 57 |         let mut cache: &mut Register<C::LowerKey, C::Payload> = unsafe{ &mut **self.register.get(upper_key).unwrap() };
Dec 12 11:47:54.929 INFO [stderr]    |             ----^^^^^
Dec 12 11:47:54.929 INFO [stderr]    |             |
Dec 12 11:47:54.929 INFO [stderr]    |             help: remove this `mut`
Dec 12 11:47:54.929 INFO [stderr]    |
Dec 12 11:47:54.929 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 11:47:54.929 INFO [stderr] 
Dec 12 11:47:54.965 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
Dec 12 11:47:54.969 INFO [stderr] su: No module specific data is present
Dec 12 11:47:55.182 INFO running `"docker" "inspect" "758d3c8b18955a71024a7e262d735edb8aa736edbea66334b5d9510a6284162a"`
Dec 12 11:47:55.245 INFO running `"docker" "rm" "-f" "758d3c8b18955a71024a7e262d735edb8aa736edbea66334b5d9510a6284162a"`
Dec 12 11:47:55.336 INFO [stdout] 758d3c8b18955a71024a7e262d735edb8aa736edbea66334b5d9510a6284162a