Dec 18 16:05:28.180 INFO checking gitter-slack-0.1.1 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 16:05:28.180 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/gitter-slack/0.1.1:/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 16:05:28.508 INFO [stdout] d0541d5e28e249d4ca26513958742db2b8cdba4b8d775d2ae0a908f13177c986
Dec 18 16:05:28.510 INFO running `"docker" "start" "-a" "d0541d5e28e249d4ca26513958742db2b8cdba4b8d775d2ae0a908f13177c986"`
Dec 18 16:05:29.486 INFO [stderr] warning: only one of `license` or `license-file` is necessary
Dec 18 16:05:29.716 INFO [stderr]     Checking chrono v0.4.6
Dec 18 16:05:31.743 INFO [stderr]     Checking gitter-slack v0.1.1 (/opt/crater/workdir)
Dec 18 16:05:34.544 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:05:34.544 INFO [stderr]    --> src/main.rs:139:17
Dec 18 16:05:34.544 INFO [stderr]     |
Dec 18 16:05:34.544 INFO [stderr] 139 |             let mut bf = &mut buffer;
Dec 18 16:05:34.544 INFO [stderr]     |                 ----^^
Dec 18 16:05:34.544 INFO [stderr]     |                 |
Dec 18 16:05:34.544 INFO [stderr]     |                 help: remove this `mut`
Dec 18 16:05:34.544 INFO [stderr]     |
Dec 18 16:05:34.544 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 16:05:34.544 INFO [stderr] 
Dec 18 16:05:34.658 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:05:34.658 INFO [stderr]    --> src/main.rs:139:17
Dec 18 16:05:34.658 INFO [stderr]     |
Dec 18 16:05:34.658 INFO [stderr] 139 |             let mut bf = &mut buffer;
Dec 18 16:05:34.658 INFO [stderr]     |                 ----^^
Dec 18 16:05:34.658 INFO [stderr]     |                 |
Dec 18 16:05:34.658 INFO [stderr]     |                 help: remove this `mut`
Dec 18 16:05:34.658 INFO [stderr]     |
Dec 18 16:05:34.658 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 16:05:34.658 INFO [stderr] 
Dec 18 16:05:34.712 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.23s
Dec 18 16:05:35.108 INFO running `"docker" "inspect" "d0541d5e28e249d4ca26513958742db2b8cdba4b8d775d2ae0a908f13177c986"`
Dec 18 16:05:35.288 INFO running `"docker" "rm" "-f" "d0541d5e28e249d4ca26513958742db2b8cdba4b8d775d2ae0a908f13177c986"`
Dec 18 16:05:35.476 INFO [stdout] d0541d5e28e249d4ca26513958742db2b8cdba4b8d775d2ae0a908f13177c986