Dec 18 01:54:54.682 INFO checking dahlia/gitter-slack against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 01:54:54.682 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/dahlia/gitter-slack:/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 01:54:55.118 INFO [stdout] 1e249cde1aba92944fa1e7f67d5e0f29475bbfe638da16c165b7c68117571d3d
Dec 18 01:54:55.124 INFO running `"docker" "start" "-a" "1e249cde1aba92944fa1e7f67d5e0f29475bbfe638da16c165b7c68117571d3d"`
Dec 18 01:54:56.656 INFO [stderr] warning: only one of `license` or `license-file` is necessary
Dec 18 01:54:56.784 INFO [stderr]    Compiling openssl-sys v0.9.17
Dec 18 01:54:56.788 INFO [stderr]     Checking tokio-io v0.1.3
Dec 18 01:54:56.790 INFO [stderr]     Checking chrono v0.4.0
Dec 18 01:54:58.226 INFO [stderr]     Checking tokio-core v0.1.9
Dec 18 01:54:58.747 INFO [stderr]    Compiling openssl v0.9.17
Dec 18 01:54:59.529 INFO [stderr]     Checking tokio-proto v0.1.1
Dec 18 01:55:01.848 INFO [stderr]     Checking hyper v0.11.2
Dec 18 01:55:03.340 INFO [stderr]     Checking native-tls v0.1.4
Dec 18 01:55:03.824 INFO [stderr]     Checking tokio-tls v0.1.3
Dec 18 01:55:06.245 INFO [stderr]     Checking hyper-tls v0.1.2
Dec 18 01:55:06.697 INFO [stderr]     Checking gitter-slack v0.1.1 (/opt/crater/workdir)
Dec 18 01:55:07.420 INFO [stderr] warning: variable does not need to be mutable
Dec 18 01:55:07.420 INFO [stderr]    --> src/main.rs:139:17
Dec 18 01:55:07.420 INFO [stderr]     |
Dec 18 01:55:07.420 INFO [stderr] 139 |             let mut bf = &mut buffer;
Dec 18 01:55:07.420 INFO [stderr]     |                 ----^^
Dec 18 01:55:07.420 INFO [stderr]     |                 |
Dec 18 01:55:07.420 INFO [stderr]     |                 help: remove this `mut`
Dec 18 01:55:07.420 INFO [stderr]     |
Dec 18 01:55:07.420 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 01:55:07.420 INFO [stderr] 
Dec 18 01:55:07.466 INFO [stderr] warning: variable does not need to be mutable
Dec 18 01:55:07.468 INFO [stderr]    --> src/main.rs:139:17
Dec 18 01:55:07.468 INFO [stderr]     |
Dec 18 01:55:07.468 INFO [stderr] 139 |             let mut bf = &mut buffer;
Dec 18 01:55:07.468 INFO [stderr]     |                 ----^^
Dec 18 01:55:07.468 INFO [stderr]     |                 |
Dec 18 01:55:07.468 INFO [stderr]     |                 help: remove this `mut`
Dec 18 01:55:07.468 INFO [stderr]     |
Dec 18 01:55:07.468 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 01:55:07.468 INFO [stderr] 
Dec 18 01:55:07.508 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.87s
Dec 18 01:55:07.718 INFO running `"docker" "inspect" "1e249cde1aba92944fa1e7f67d5e0f29475bbfe638da16c165b7c68117571d3d"`
Dec 18 01:55:07.776 INFO running `"docker" "rm" "-f" "1e249cde1aba92944fa1e7f67d5e0f29475bbfe638da16c165b7c68117571d3d"`
Dec 18 01:55:07.845 INFO [stdout] 1e249cde1aba92944fa1e7f67d5e0f29475bbfe638da16c165b7c68117571d3d