Dec 19 19:32:07.142 INFO checking brson/cargo-index-tool against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 19:32:07.142 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/brson/cargo-index-tool:/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 19:32:07.624 INFO [stdout] 1317a60cddf614d883cac38b7ea982b3150183fac768d0eed81d8d4b41f812da
Dec 19 19:32:07.628 INFO running `"docker" "start" "-a" "1317a60cddf614d883cac38b7ea982b3150183fac768d0eed81d8d4b41f812da"`
Dec 19 19:32:09.208 INFO [stderr]     Checking semver v0.7.0
Dec 19 19:32:09.220 INFO [stderr]    Compiling structopt-derive v0.0.5
Dec 19 19:32:09.229 INFO [stderr]     Checking structopt v0.0.5
Dec 19 19:32:11.756 INFO [stderr]     Checking cargo-index-tool v0.1.0 (/opt/crater/workdir)
Dec 19 19:32:13.117 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.06s
Dec 19 19:32:14.463 INFO running `"docker" "inspect" "1317a60cddf614d883cac38b7ea982b3150183fac768d0eed81d8d4b41f812da"`
Dec 19 19:32:14.856 INFO running `"docker" "rm" "-f" "1317a60cddf614d883cac38b7ea982b3150183fac768d0eed81d8d4b41f812da"`
Dec 19 19:32:15.196 INFO [stdout] 1317a60cddf614d883cac38b7ea982b3150183fac768d0eed81d8d4b41f812da