Dec 18 02:37:51.090 INFO checking cesare/helixexp against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 02:37:51.090 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/cesare/helixexp:/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 02:37:51.537 INFO [stdout] 92093bf5ac3a3bd3774044f8f804f44e6ed98e9bc4ca53ac147dfb9aae940339
Dec 18 02:37:51.539 INFO running `"docker" "start" "-a" "92093bf5ac3a3bd3774044f8f804f44e6ed98e9bc4ca53ac147dfb9aae940339"`
Dec 18 02:37:53.065 INFO [stderr]    Compiling libcruby-sys v0.6.3
Dec 18 02:37:53.065 INFO [stderr]     Checking cslice v0.3.0
Dec 18 02:37:54.688 INFO [stderr]     Checking helix v0.6.3
Dec 18 02:37:55.182 INFO [stderr]     Checking helixexp v0.1.0 (/opt/crater/workdir)
Dec 18 02:37:55.734 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.70s
Dec 18 02:37:56.626 INFO running `"docker" "inspect" "92093bf5ac3a3bd3774044f8f804f44e6ed98e9bc4ca53ac147dfb9aae940339"`
Dec 18 02:37:56.908 INFO running `"docker" "rm" "-f" "92093bf5ac3a3bd3774044f8f804f44e6ed98e9bc4ca53ac147dfb9aae940339"`
Dec 18 02:37:57.155 INFO [stdout] 92093bf5ac3a3bd3774044f8f804f44e6ed98e9bc4ca53ac147dfb9aae940339