Dec 19 12:59:48.462 INFO checking matt-williams/enum-from-derive against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 12:59:48.462 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/matt-williams/enum-from-derive:/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 12:59:48.726 INFO [stdout] 6030208419fce408a17ba8051115b8048d997a8403c4e2ebed7377e4fd04f892
Dec 19 12:59:48.728 INFO running `"docker" "start" "-a" "6030208419fce408a17ba8051115b8048d997a8403c4e2ebed7377e4fd04f892"`
Dec 19 12:59:49.788 INFO [stderr]     Checking quote v0.3.12
Dec 19 12:59:49.792 INFO [stderr]     Checking unicode-xid v0.0.4
Dec 19 12:59:49.792 INFO [stderr]     Checking try_from v0.2.1
Dec 19 12:59:49.800 INFO [stderr]    Compiling enum-from-derive v0.1.0 (/opt/crater/workdir)
Dec 19 12:59:50.408 INFO [stderr]     Checking syn v0.11.4
Dec 19 12:59:53.104 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.34s
Dec 19 12:59:53.468 INFO running `"docker" "inspect" "6030208419fce408a17ba8051115b8048d997a8403c4e2ebed7377e4fd04f892"`
Dec 19 12:59:53.542 INFO running `"docker" "rm" "-f" "6030208419fce408a17ba8051115b8048d997a8403c4e2ebed7377e4fd04f892"`
Dec 19 12:59:53.627 INFO [stdout] 6030208419fce408a17ba8051115b8048d997a8403c4e2ebed7377e4fd04f892