Dec 18 11:44:37.441 INFO checking rustc-ap-serialize-308.0.0 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 11:44:37.441 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/rustc-ap-serialize/308.0.0:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 11:44:37.616 INFO [stdout] f4e294cf9c2283ccf53b72c5285f671ebbffc1c95762392b8fee8e060a82109a
Dec 18 11:44:37.618 INFO running `"docker" "start" "-a" "f4e294cf9c2283ccf53b72c5285f671ebbffc1c95762392b8fee8e060a82109a"`
Dec 18 11:44:38.531 INFO [stderr]     Checking smallvec v0.6.7
Dec 18 11:44:39.152 INFO [stderr]     Checking rustc-ap-serialize v308.0.0 (/opt/crater/workdir)
Dec 18 11:44:42.476 INFO [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
Dec 18 11:44:42.476 INFO [stderr]     --> json.rs:3496:34
Dec 18 11:44:42.476 INFO [stderr]      |
Dec 18 11:44:42.476 INFO [stderr] 3496 |             let trimmed = source.trim_left_matches(' ');
Dec 18 11:44:42.476 INFO [stderr]      |                                  ^^^^^^^^^^^^^^^^^
Dec 18 11:44:42.476 INFO [stderr]      |
Dec 18 11:44:42.476 INFO [stderr]      = note: #[warn(deprecated)] on by default
Dec 18 11:44:42.476 INFO [stderr] 
Dec 18 11:44:44.936 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.41s
Dec 18 11:44:46.238 INFO running `"docker" "inspect" "f4e294cf9c2283ccf53b72c5285f671ebbffc1c95762392b8fee8e060a82109a"`
Dec 18 11:44:46.526 INFO running `"docker" "rm" "-f" "f4e294cf9c2283ccf53b72c5285f671ebbffc1c95762392b8fee8e060a82109a"`
Dec 18 11:44:46.844 INFO [stdout] f4e294cf9c2283ccf53b72c5285f671ebbffc1c95762392b8fee8e060a82109a