Dec 19 10:03:40.773 INFO checking robot-head/led_dash against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 10:03:40.773 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-7/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/robot-head/led_dash:/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 10:03:40.928 INFO [stdout] 3ebe392778b806d465618bddb50d8fa9d2b30cfceadb282f0e5ae53e73f7e354
Dec 19 10:03:40.931 INFO running `"docker" "start" "-a" "3ebe392778b806d465618bddb50d8fa9d2b30cfceadb282f0e5ae53e73f7e354"`
Dec 19 10:03:42.164 INFO [stderr]     Checking memchr v1.0.2
Dec 19 10:03:42.168 INFO [stderr]     Checking filetime v0.1.15
Dec 19 10:03:42.174 INFO [stderr]     Checking base64 v0.7.0
Dec 19 10:03:42.174 INFO [stderr]     Checking twoway v0.1.8
Dec 19 10:03:42.174 INFO [stderr]     Checking threadpool v1.7.1
Dec 19 10:03:42.174 INFO [stderr]     Checking log v0.3.9
Dec 19 10:03:42.197 INFO [stderr]     Checking uuid v0.1.18
Dec 19 10:03:42.198 INFO [stderr]     Checking brotli-sys v0.2.1
Dec 19 10:03:42.757 INFO [stderr]     Checking chrono v0.4.2
Dec 19 10:03:42.864 INFO [stderr]     Checking num v0.1.42
Dec 19 10:03:42.992 INFO [stderr]     Checking buf_redux v0.6.3
Dec 19 10:03:43.080 INFO [stderr]     Checking gzip-header v0.1.2
Dec 19 10:03:43.414 INFO [stderr]     Checking brotli2 v0.2.2
Dec 19 10:03:43.805 INFO [stderr]     Checking chrono v0.2.25
Dec 19 10:03:43.836 INFO [stderr]    Compiling mime_guess v1.8.4
Dec 19 10:03:44.111 INFO [stderr]     Checking url v0.2.38
Dec 19 10:03:44.276 INFO [stderr]     Checking mime v0.2.6
Dec 19 10:03:45.312 INFO [stderr]     Checking deflate v0.7.18
Dec 19 10:03:48.225 INFO [stderr]     Checking tiny_http v0.5.9
Dec 19 10:03:49.288 INFO [stderr]     Checking multipart v0.13.6
Dec 19 10:03:50.010 INFO [stderr]     Checking rouille v2.1.0
Dec 19 10:03:51.370 INFO [stderr]     Checking led_dash v0.1.0 (/opt/crater/workdir)
Dec 19 10:03:51.908 INFO [stderr] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
Dec 19 10:03:51.908 INFO [stderr]  --> src/main.rs:1:12
Dec 19 10:03:51.908 INFO [stderr]   |
Dec 19 10:03:51.908 INFO [stderr] 1 | #![feature(proc_macro)]
Dec 19 10:03:51.908 INFO [stderr]   |            ^^^^^^^^^^
Dec 19 10:03:51.908 INFO [stderr]   |
Dec 19 10:03:51.908 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 10:03:51.908 INFO [stderr] 
Dec 19 10:03:51.925 INFO [stderr] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
Dec 19 10:03:51.925 INFO [stderr]  --> src/main.rs:1:12
Dec 19 10:03:51.925 INFO [stderr]   |
Dec 19 10:03:51.925 INFO [stderr] 1 | #![feature(proc_macro)]
Dec 19 10:03:51.925 INFO [stderr]   |            ^^^^^^^^^^
Dec 19 10:03:51.925 INFO [stderr]   |
Dec 19 10:03:51.925 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 10:03:51.925 INFO [stderr] 
Dec 19 10:03:51.939 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.06s
Dec 19 10:03:52.189 INFO running `"docker" "inspect" "3ebe392778b806d465618bddb50d8fa9d2b30cfceadb282f0e5ae53e73f7e354"`
Dec 19 10:03:52.277 INFO running `"docker" "rm" "-f" "3ebe392778b806d465618bddb50d8fa9d2b30cfceadb282f0e5ae53e73f7e354"`
Dec 19 10:03:52.381 INFO [stdout] 3ebe392778b806d465618bddb50d8fa9d2b30cfceadb282f0e5ae53e73f7e354