Dec 17 22:50:10.951 INFO checking ipost/rmosaic against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 22:50:10.951 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-2/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/ipost/rmosaic:/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 17 22:50:11.412 INFO [stdout] 8f853fcbaa5416105110d1e1759b0106c9740c1da1b8bb947bc0ebcd28b79236
Dec 17 22:50:11.414 INFO running `"docker" "start" "-a" "8f853fcbaa5416105110d1e1759b0106c9740c1da1b8bb947bc0ebcd28b79236"`
Dec 17 22:50:14.036 INFO [stderr]     Checking serde v1.0.47
Dec 17 22:50:14.044 INFO [stderr]    Compiling serde_derive v1.0.48
Dec 17 22:50:29.742 INFO [stderr]     Checking serde_json v1.0.17
Dec 17 22:50:31.557 INFO [stderr]     Checking rmosaic v0.1.0 (/opt/crater/workdir)
Dec 17 22:50:33.236 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.37s
Dec 17 22:50:33.778 INFO running `"docker" "inspect" "8f853fcbaa5416105110d1e1759b0106c9740c1da1b8bb947bc0ebcd28b79236"`
Dec 17 22:50:33.917 INFO running `"docker" "rm" "-f" "8f853fcbaa5416105110d1e1759b0106c9740c1da1b8bb947bc0ebcd28b79236"`
Dec 17 22:50:34.030 INFO [stdout] 8f853fcbaa5416105110d1e1759b0106c9740c1da1b8bb947bc0ebcd28b79236