Dec 18 14:05:51.536 INFO checking mcs-0.1.1 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 14:05:51.536 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/mcs/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 14:05:51.705 INFO [stdout] ee65033a0b4c08d54fa4ffb4b5a3f3b11bc394ffd6810a25dc0664381dcb6b32
Dec 18 14:05:51.708 INFO running `"docker" "start" "-a" "ee65033a0b4c08d54fa4ffb4b5a3f3b11bc394ffd6810a25dc0664381dcb6b32"`
Dec 18 14:05:52.393 INFO [stderr]     Checking mcs v0.1.1 (/opt/crater/workdir)
Dec 18 14:05:52.552 INFO [stderr] warning: unnecessary `unsafe` block
Dec 18 14:05:52.552 INFO [stderr]    --> src/mutex.rs:117:9
Dec 18 14:05:52.552 INFO [stderr]     |
Dec 18 14:05:52.553 INFO [stderr] 117 |         unsafe {
Dec 18 14:05:52.553 INFO [stderr]     |         ^^^^^^ unnecessary `unsafe` block
Dec 18 14:05:52.553 INFO [stderr]     |
Dec 18 14:05:52.553 INFO [stderr]     = note: #[warn(unused_unsafe)] on by default
Dec 18 14:05:52.553 INFO [stderr] 
Dec 18 14:05:52.553 INFO [stderr] warning: the feature `generic_param_attrs` has been stable since 1.27.0 and no longer requires an attribute to enable
Dec 18 14:05:52.553 INFO [stderr]  --> src/lib.rs:1:58
Dec 18 14:05:52.553 INFO [stderr]   |
Dec 18 14:05:52.553 INFO [stderr] 1 | #![cfg_attr(feature = "unstable", feature(asm, const_fn, generic_param_attrs, dropck_eyepatch))]
Dec 18 14:05:52.553 INFO [stderr]   |                                                          ^^^^^^^^^^^^^^^^^^^
Dec 18 14:05:52.553 INFO [stderr]   |
Dec 18 14:05:52.553 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 18 14:05:52.553 INFO [stderr] 
Dec 18 14:05:52.780 INFO [stderr] warning: unnecessary `unsafe` block
Dec 18 14:05:52.780 INFO [stderr]    --> src/mutex.rs:117:9
Dec 18 14:05:52.780 INFO [stderr]     |
Dec 18 14:05:52.780 INFO [stderr] 117 |         unsafe {
Dec 18 14:05:52.780 INFO [stderr]     |         ^^^^^^ unnecessary `unsafe` block
Dec 18 14:05:52.780 INFO [stderr]     |
Dec 18 14:05:52.780 INFO [stderr]     = note: #[warn(unused_unsafe)] on by default
Dec 18 14:05:52.780 INFO [stderr] 
Dec 18 14:05:52.780 INFO [stderr] warning: the feature `generic_param_attrs` has been stable since 1.27.0 and no longer requires an attribute to enable
Dec 18 14:05:52.780 INFO [stderr]  --> src/lib.rs:1:58
Dec 18 14:05:52.780 INFO [stderr]   |
Dec 18 14:05:52.780 INFO [stderr] 1 | #![cfg_attr(feature = "unstable", feature(asm, const_fn, generic_param_attrs, dropck_eyepatch))]
Dec 18 14:05:52.780 INFO [stderr]   |                                                          ^^^^^^^^^^^^^^^^^^^
Dec 18 14:05:52.780 INFO [stderr]   |
Dec 18 14:05:52.780 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 18 14:05:52.781 INFO [stderr] 
Dec 18 14:05:52.818 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
Dec 18 14:05:53.326 INFO running `"docker" "inspect" "ee65033a0b4c08d54fa4ffb4b5a3f3b11bc394ffd6810a25dc0664381dcb6b32"`
Dec 18 14:05:53.571 INFO running `"docker" "rm" "-f" "ee65033a0b4c08d54fa4ffb4b5a3f3b11bc394ffd6810a25dc0664381dcb6b32"`
Dec 18 14:05:53.824 INFO [stdout] ee65033a0b4c08d54fa4ffb4b5a3f3b11bc394ffd6810a25dc0664381dcb6b32