Dec 19 17:50:05.817 INFO checking dottorblaster/siren against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 17:50:05.817 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/dottorblaster/siren:/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 17:50:06.057 INFO [stdout] 7e23071f39256577ee3ac8aef244276538605462d02c88fd213bf3c742057bcb
Dec 19 17:50:06.062 INFO running `"docker" "start" "-a" "7e23071f39256577ee3ac8aef244276538605462d02c88fd213bf3c742057bcb"`
Dec 19 17:50:06.980 INFO [stderr]     Checking atty v0.2.11
Dec 19 17:50:06.980 INFO [stderr]    Compiling serde_derive v1.0.82
Dec 19 17:50:07.295 INFO [stderr]     Checking clap v2.32.0
Dec 19 17:50:20.962 INFO [stderr]     Checking siren v1.1.1 (/opt/crater/workdir)
Dec 19 17:50:21.993 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.12s
Dec 19 17:50:22.675 INFO running `"docker" "inspect" "7e23071f39256577ee3ac8aef244276538605462d02c88fd213bf3c742057bcb"`
Dec 19 17:50:22.951 INFO running `"docker" "rm" "-f" "7e23071f39256577ee3ac8aef244276538605462d02c88fd213bf3c742057bcb"`
Dec 19 17:50:23.122 INFO [stdout] 7e23071f39256577ee3ac8aef244276538605462d02c88fd213bf3c742057bcb