Dec 18 12:38:59.246 INFO checking quickcheck_derive-0.2.1 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 12:38:59.246 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-3/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/quickcheck_derive/0.2.1:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 12:38:59.620 INFO [stdout] e1eff58e0d24d324fd5afbae2111f76dbc33f0126f8442dfc5e9acf5f17b2a39
Dec 18 12:38:59.624 INFO running `"docker" "start" "-a" "e1eff58e0d24d324fd5afbae2111f76dbc33f0126f8442dfc5e9acf5f17b2a39"`
Dec 18 12:39:01.180 INFO [stderr]     Checking syn v0.14.9
Dec 18 12:39:05.745 INFO [stderr]     Checking synstructure v0.9.0
Dec 18 12:39:06.437 INFO [stderr]     Checking quickcheck_derive v0.2.1 (/opt/crater/workdir)
Dec 18 12:39:07.084 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.01s
Dec 18 12:39:07.334 INFO running `"docker" "inspect" "e1eff58e0d24d324fd5afbae2111f76dbc33f0126f8442dfc5e9acf5f17b2a39"`
Dec 18 12:39:07.447 INFO running `"docker" "rm" "-f" "e1eff58e0d24d324fd5afbae2111f76dbc33f0126f8442dfc5e9acf5f17b2a39"`
Dec 18 12:39:07.546 INFO [stdout] e1eff58e0d24d324fd5afbae2111f76dbc33f0126f8442dfc5e9acf5f17b2a39