Dec 18 09:36:55.084 INFO checking variant_count-1.0.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 09:36:55.085 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-3/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/variant_count/1.0.0:/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 09:36:55.430 INFO [stdout] 279f60dbac48f46a27dff4e498fbaf52347531d798b09b0d6cdee17bfea52ba3
Dec 18 09:36:55.434 INFO running `"docker" "start" "-a" "279f60dbac48f46a27dff4e498fbaf52347531d798b09b0d6cdee17bfea52ba3"`
Dec 18 09:36:56.274 INFO [stderr]    Compiling proc-macro2 v0.4.24
Dec 18 09:36:57.825 INFO [stderr]     Checking quote v0.6.10
Dec 18 09:36:58.288 INFO [stderr]     Checking syn v0.15.23
Dec 18 09:37:02.752 INFO [stderr]     Checking variant_count v1.0.0 (/opt/crater/workdir)
Dec 18 09:37:09.696 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.44s
Dec 18 09:37:09.958 INFO running `"docker" "inspect" "279f60dbac48f46a27dff4e498fbaf52347531d798b09b0d6cdee17bfea52ba3"`
Dec 18 09:37:10.062 INFO running `"docker" "rm" "-f" "279f60dbac48f46a27dff4e498fbaf52347531d798b09b0d6cdee17bfea52ba3"`
Dec 18 09:37:10.232 INFO [stdout] 279f60dbac48f46a27dff4e498fbaf52347531d798b09b0d6cdee17bfea52ba3