Dec 18 10:35:41.945 INFO checking syn-error-experiment-0.0.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 10:35:41.945 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/syn-error-experiment/0.0.0:/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 10:35:42.168 INFO [stdout] 7c570f6f2e27d54d117266481c0def5b91d3d64cea8ee4160ab3c7d059e357e7
Dec 18 10:35:42.172 INFO running `"docker" "start" "-a" "7c570f6f2e27d54d117266481c0def5b91d3d64cea8ee4160ab3c7d059e357e7"`
Dec 18 10:35:43.148 INFO [stderr]     Checking proc-macro2 v0.4.24
Dec 18 10:35:44.024 INFO [stderr]     Checking quote v0.6.10
Dec 18 10:35:44.390 INFO [stderr]     Checking syn v0.14.9
Dec 18 10:35:45.304 INFO [stderr]     Checking syn-error-experiment v0.0.0 (/opt/crater/workdir)
Dec 18 10:35:46.341 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.23s
Dec 18 10:35:46.858 INFO running `"docker" "inspect" "7c570f6f2e27d54d117266481c0def5b91d3d64cea8ee4160ab3c7d059e357e7"`
Dec 18 10:35:47.180 INFO running `"docker" "rm" "-f" "7c570f6f2e27d54d117266481c0def5b91d3d64cea8ee4160ab3c7d059e357e7"`
Dec 18 10:35:47.447 INFO [stdout] 7c570f6f2e27d54d117266481c0def5b91d3d64cea8ee4160ab3c7d059e357e7