Dec 19 07:20:41.500 INFO checking th0rex/insert_unicode against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 07:20:41.500 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/th0rex/insert_unicode:/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 07:20:41.950 INFO [stdout] d60a0d0bf90aa7071a48a5a11c6da4b2ec42bf3cbe5d854ab7b0799f97b4c919
Dec 19 07:20:41.952 INFO running `"docker" "start" "-a" "d60a0d0bf90aa7071a48a5a11c6da4b2ec42bf3cbe5d854ab7b0799f97b4c919"`
Dec 19 07:20:44.196 INFO [stderr]    Compiling libc v0.2.44
Dec 19 07:20:46.384 INFO [stderr]     Checking rand v0.6.1
Dec 19 07:20:48.868 INFO [stderr]     Checking insert_unicode v0.1.0 (/opt/crater/workdir)
Dec 19 07:20:49.233 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.11s
Dec 19 07:20:50.144 INFO running `"docker" "inspect" "d60a0d0bf90aa7071a48a5a11c6da4b2ec42bf3cbe5d854ab7b0799f97b4c919"`
Dec 19 07:20:50.414 INFO running `"docker" "rm" "-f" "d60a0d0bf90aa7071a48a5a11c6da4b2ec42bf3cbe5d854ab7b0799f97b4c919"`
Dec 19 07:20:50.704 INFO [stdout] d60a0d0bf90aa7071a48a5a11c6da4b2ec42bf3cbe5d854ab7b0799f97b4c919