Dec 19 09:32:28.777 INFO checking s3rvac/yabir against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 09:32:28.777 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/s3rvac/yabir:/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 09:32:29.193 INFO [stdout] 7242a36e2b367e150b6972801cb38d9d20e2d34f08291b57e4ead2a997ea1f7e
Dec 19 09:32:29.195 INFO running `"docker" "start" "-a" "7242a36e2b367e150b6972801cb38d9d20e2d34f08291b57e4ead2a997ea1f7e"`
Dec 19 09:32:31.120 INFO [stderr]     Checking yabir v0.1.0 (/opt/crater/workdir)
Dec 19 09:32:31.564 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:32:31.564 INFO [stderr]    --> src/runner.rs:112:30
Dec 19 09:32:31.564 INFO [stderr]     |
Dec 19 09:32:31.564 INFO [stderr] 112 |     fn read_value(&mut self, mut input: &mut std::io::Read) -> Result<(), String> {
Dec 19 09:32:31.564 INFO [stderr]     |                              ----^^^^^
Dec 19 09:32:31.564 INFO [stderr]     |                              |
Dec 19 09:32:31.564 INFO [stderr]     |                              help: remove this `mut`
Dec 19 09:32:31.564 INFO [stderr]     |
Dec 19 09:32:31.564 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 19 09:32:31.564 INFO [stderr] 
Dec 19 09:32:31.567 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:32:31.567 INFO [stderr]    --> src/runner.rs:136:31
Dec 19 09:32:31.567 INFO [stderr]     |
Dec 19 09:32:31.567 INFO [stderr] 136 |     fn write_value(&mut self, mut output: &mut std::io::Write) -> Result<(), String> {
Dec 19 09:32:31.567 INFO [stderr]     |                               ----^^^^^^
Dec 19 09:32:31.567 INFO [stderr]     |                               |
Dec 19 09:32:31.567 INFO [stderr]     |                               help: remove this `mut`
Dec 19 09:32:31.567 INFO [stderr] 
Dec 19 09:32:31.586 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:32:31.586 INFO [stderr]    --> src/runner.rs:112:30
Dec 19 09:32:31.586 INFO [stderr]     |
Dec 19 09:32:31.586 INFO [stderr] 112 |     fn read_value(&mut self, mut input: &mut std::io::Read) -> Result<(), String> {
Dec 19 09:32:31.586 INFO [stderr]     |                              ----^^^^^
Dec 19 09:32:31.586 INFO [stderr]     |                              |
Dec 19 09:32:31.586 INFO [stderr]     |                              help: remove this `mut`
Dec 19 09:32:31.586 INFO [stderr]     |
Dec 19 09:32:31.586 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 19 09:32:31.586 INFO [stderr] 
Dec 19 09:32:31.587 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:32:31.587 INFO [stderr]    --> src/runner.rs:136:31
Dec 19 09:32:31.587 INFO [stderr]     |
Dec 19 09:32:31.587 INFO [stderr] 136 |     fn write_value(&mut self, mut output: &mut std::io::Write) -> Result<(), String> {
Dec 19 09:32:31.587 INFO [stderr]     |                               ----^^^^^^
Dec 19 09:32:31.587 INFO [stderr]     |                               |
Dec 19 09:32:31.587 INFO [stderr]     |                               help: remove this `mut`
Dec 19 09:32:31.587 INFO [stderr] 
Dec 19 09:32:31.638 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
Dec 19 09:32:32.632 INFO running `"docker" "inspect" "7242a36e2b367e150b6972801cb38d9d20e2d34f08291b57e4ead2a997ea1f7e"`
Dec 19 09:32:33.012 INFO running `"docker" "rm" "-f" "7242a36e2b367e150b6972801cb38d9d20e2d34f08291b57e4ead2a997ea1f7e"`
Dec 19 09:32:33.364 INFO [stdout] 7242a36e2b367e150b6972801cb38d9d20e2d34f08291b57e4ead2a997ea1f7e