Dec 18 13:05:38.434 INFO checking pem-iterator-0.2.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 13:05:38.434 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 13:05:38.766 INFO [stdout] 274c575aa5f4098dc5004fc361d74041416e56e569e67363f85c9f8559867b50
Dec 18 13:05:38.768 INFO running `"docker" "start" "-a" "274c575aa5f4098dc5004fc361d74041416e56e569e67363f85c9f8559867b50"`
Dec 18 13:05:40.877 INFO [stderr]     Checking pem-iterator v0.2.0 (/opt/crater/workdir)
Dec 18 13:05:40.884 INFO [stderr]     Checking pem v0.4.1
Dec 18 13:05:43.558 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:05:43.558 INFO [stderr]    --> benches/bench.rs:201:9
Dec 18 13:05:43.558 INFO [stderr]     |
Dec 18 13:05:43.558 INFO [stderr] 201 |     let mut label_buf = String::new();
Dec 18 13:05:43.558 INFO [stderr]     |         ----^^^^^^^^^
Dec 18 13:05:43.558 INFO [stderr]     |         |
Dec 18 13:05:43.558 INFO [stderr]     |         help: remove this `mut`
Dec 18 13:05:43.558 INFO [stderr]     |
Dec 18 13:05:43.558 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 13:05:43.558 INFO [stderr] 
Dec 18 13:05:43.558 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:05:43.558 INFO [stderr]    --> benches/bench.rs:242:9
Dec 18 13:05:43.558 INFO [stderr]     |
Dec 18 13:05:43.558 INFO [stderr] 242 |     let mut label_buf = String::new();
Dec 18 13:05:43.558 INFO [stderr]     |         ----^^^^^^^^^
Dec 18 13:05:43.558 INFO [stderr]     |         |
Dec 18 13:05:43.558 INFO [stderr]     |         help: remove this `mut`
Dec 18 13:05:43.558 INFO [stderr] 
Dec 18 13:05:43.558 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:05:43.558 INFO [stderr]    --> benches/bench.rs:285:9
Dec 18 13:05:43.558 INFO [stderr]     |
Dec 18 13:05:43.558 INFO [stderr] 285 |     let mut label_buf = String::new();
Dec 18 13:05:43.558 INFO [stderr]     |         ----^^^^^^^^^
Dec 18 13:05:43.558 INFO [stderr]     |         |
Dec 18 13:05:43.558 INFO [stderr]     |         help: remove this `mut`
Dec 18 13:05:43.558 INFO [stderr] 
Dec 18 13:05:43.558 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:05:43.558 INFO [stderr]    --> benches/bench.rs:326:9
Dec 18 13:05:43.558 INFO [stderr]     |
Dec 18 13:05:43.558 INFO [stderr] 326 |     let mut label_buf = String::new();
Dec 18 13:05:43.558 INFO [stderr]     |         ----^^^^^^^^^
Dec 18 13:05:43.558 INFO [stderr]     |         |
Dec 18 13:05:43.558 INFO [stderr]     |         help: remove this `mut`
Dec 18 13:05:43.558 INFO [stderr] 
Dec 18 13:05:44.077 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.34s
Dec 18 13:05:45.364 INFO running `"docker" "inspect" "274c575aa5f4098dc5004fc361d74041416e56e569e67363f85c9f8559867b50"`
Dec 18 13:05:45.761 INFO running `"docker" "rm" "-f" "274c575aa5f4098dc5004fc361d74041416e56e569e67363f85c9f8559867b50"`
Dec 18 13:05:46.068 INFO [stdout] 274c575aa5f4098dc5004fc361d74041416e56e569e67363f85c9f8559867b50