Dec 18 13:05:41.223 INFO checking pem-iterator-0.2.0 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 13:05:41.223 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/pem-iterator/0.2.0:/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 13:05:41.651 INFO [stdout] 8167e93baf221a9001a4fb88b78428315f02998e904eb742e7aca2490100f7e6
Dec 18 13:05:41.653 INFO running `"docker" "start" "-a" "8167e93baf221a9001a4fb88b78428315f02998e904eb742e7aca2490100f7e6"`
Dec 18 13:05:43.960 INFO [stderr]     Checking pem-iterator v0.2.0 (/opt/crater/workdir)
Dec 18 13:05:43.972 INFO [stderr]     Checking pem v0.4.1
Dec 18 13:05:46.660 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:05:46.660 INFO [stderr]    --> benches/bench.rs:201:9
Dec 18 13:05:46.660 INFO [stderr]     |
Dec 18 13:05:46.660 INFO [stderr] 201 |     let mut label_buf = String::new();
Dec 18 13:05:46.660 INFO [stderr]     |         ----^^^^^^^^^
Dec 18 13:05:46.660 INFO [stderr]     |         |
Dec 18 13:05:46.660 INFO [stderr]     |         help: remove this `mut`
Dec 18 13:05:46.660 INFO [stderr]     |
Dec 18 13:05:46.660 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 13:05:46.660 INFO [stderr] 
Dec 18 13:05:46.660 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:05:46.660 INFO [stderr]    --> benches/bench.rs:242:9
Dec 18 13:05:46.660 INFO [stderr]     |
Dec 18 13:05:46.660 INFO [stderr] 242 |     let mut label_buf = String::new();
Dec 18 13:05:46.660 INFO [stderr]     |         ----^^^^^^^^^
Dec 18 13:05:46.660 INFO [stderr]     |         |
Dec 18 13:05:46.660 INFO [stderr]     |         help: remove this `mut`
Dec 18 13:05:46.660 INFO [stderr] 
Dec 18 13:05:46.660 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:05:46.661 INFO [stderr]    --> benches/bench.rs:285:9
Dec 18 13:05:46.661 INFO [stderr]     |
Dec 18 13:05:46.661 INFO [stderr] 285 |     let mut label_buf = String::new();
Dec 18 13:05:46.661 INFO [stderr]     |         ----^^^^^^^^^
Dec 18 13:05:46.661 INFO [stderr]     |         |
Dec 18 13:05:46.661 INFO [stderr]     |         help: remove this `mut`
Dec 18 13:05:46.661 INFO [stderr] 
Dec 18 13:05:46.661 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:05:46.661 INFO [stderr]    --> benches/bench.rs:326:9
Dec 18 13:05:46.661 INFO [stderr]     |
Dec 18 13:05:46.661 INFO [stderr] 326 |     let mut label_buf = String::new();
Dec 18 13:05:46.661 INFO [stderr]     |         ----^^^^^^^^^
Dec 18 13:05:46.661 INFO [stderr]     |         |
Dec 18 13:05:46.661 INFO [stderr]     |         help: remove this `mut`
Dec 18 13:05:46.661 INFO [stderr] 
Dec 18 13:05:46.720 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.85s
Dec 18 13:05:47.226 INFO running `"docker" "inspect" "8167e93baf221a9001a4fb88b78428315f02998e904eb742e7aca2490100f7e6"`
Dec 18 13:05:47.463 INFO running `"docker" "rm" "-f" "8167e93baf221a9001a4fb88b78428315f02998e904eb742e7aca2490100f7e6"`
Dec 18 13:05:47.642 INFO [stdout] 8167e93baf221a9001a4fb88b78428315f02998e904eb742e7aca2490100f7e6