Dec 19 05:52:43.705 INFO checking vti/rust-test against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 05:52:43.705 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/vti/rust-test:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 05:52:44.112 INFO [stdout] 770b245f2270b3572b4fe967831a6da15586af18354136747e5bf8ddec91a092
Dec 19 05:52:44.114 INFO running `"docker" "start" "-a" "770b245f2270b3572b4fe967831a6da15586af18354136747e5bf8ddec91a092"`
Dec 19 05:52:45.528 INFO [stderr]     Checking rust-test v0.1.0 (/opt/crater/workdir)
Dec 19 05:52:45.752 INFO [stderr] warning: value assigned to `a` is never read
Dec 19 05:52:45.752 INFO [stderr]  --> src/main.rs:7:5
Dec 19 05:52:45.752 INFO [stderr]   |
Dec 19 05:52:45.752 INFO [stderr] 7 |     a = a + b;
Dec 19 05:52:45.752 INFO [stderr]   |     ^
Dec 19 05:52:45.752 INFO [stderr]   |
Dec 19 05:52:45.752 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 19 05:52:45.752 INFO [stderr]   = help: maybe it is overwritten before being read?
Dec 19 05:52:45.752 INFO [stderr] 
Dec 19 05:52:45.752 INFO [stderr] warning: variable does not need to be mutable
Dec 19 05:52:45.752 INFO [stderr]  --> src/main.rs:5:9
Dec 19 05:52:45.752 INFO [stderr]   |
Dec 19 05:52:45.752 INFO [stderr] 5 |     let mut b = 0;
Dec 19 05:52:45.752 INFO [stderr]   |         ----^
Dec 19 05:52:45.752 INFO [stderr]   |         |
Dec 19 05:52:45.752 INFO [stderr]   |         help: remove this `mut`
Dec 19 05:52:45.752 INFO [stderr]   |
Dec 19 05:52:45.753 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 19 05:52:45.753 INFO [stderr] 
Dec 19 05:52:45.772 INFO [stderr] warning: value assigned to `a` is never read
Dec 19 05:52:45.772 INFO [stderr]  --> src/main.rs:7:5
Dec 19 05:52:45.772 INFO [stderr]   |
Dec 19 05:52:45.772 INFO [stderr] 7 |     a = a + b;
Dec 19 05:52:45.772 INFO [stderr]   |     ^
Dec 19 05:52:45.772 INFO [stderr]   |
Dec 19 05:52:45.772 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 19 05:52:45.772 INFO [stderr]   = help: maybe it is overwritten before being read?
Dec 19 05:52:45.772 INFO [stderr] 
Dec 19 05:52:45.772 INFO [stderr] warning: variable does not need to be mutable
Dec 19 05:52:45.772 INFO [stderr]  --> src/main.rs:5:9
Dec 19 05:52:45.772 INFO [stderr]   |
Dec 19 05:52:45.772 INFO [stderr] 5 |     let mut b = 0;
Dec 19 05:52:45.772 INFO [stderr]   |         ----^
Dec 19 05:52:45.772 INFO [stderr]   |         |
Dec 19 05:52:45.772 INFO [stderr]   |         help: remove this `mut`
Dec 19 05:52:45.772 INFO [stderr]   |
Dec 19 05:52:45.772 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 19 05:52:45.772 INFO [stderr] 
Dec 19 05:52:45.797 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
Dec 19 05:52:46.376 INFO running `"docker" "inspect" "770b245f2270b3572b4fe967831a6da15586af18354136747e5bf8ddec91a092"`
Dec 19 05:52:46.676 INFO running `"docker" "rm" "-f" "770b245f2270b3572b4fe967831a6da15586af18354136747e5bf8ddec91a092"`
Dec 19 05:52:46.921 INFO [stdout] 770b245f2270b3572b4fe967831a6da15586af18354136747e5bf8ddec91a092