[INFO] fetching crate qtrac-retest 4.0.6...
[INFO] extracting crate qtrac-retest 4.0.6 into work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/qtrac-retest/4.0.6
[INFO] extracting crate qtrac-retest 4.0.6 into work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/qtrac-retest/4.0.6
[INFO] validating manifest of qtrac-retest-4.0.6 on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of qtrac-retest-4.0.6 on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing qtrac-retest-4.0.6
[INFO] finished frobbing qtrac-retest-4.0.6
[INFO] frobbed toml for qtrac-retest-4.0.6 written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/qtrac-retest/4.0.6/Cargo.toml
[INFO] started frobbing qtrac-retest-4.0.6
[INFO] finished frobbing qtrac-retest-4.0.6
[INFO] frobbed toml for qtrac-retest-4.0.6 written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/qtrac-retest/4.0.6/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking qtrac-retest-4.0.6 against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-4/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/qtrac-retest/4.0.6:/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" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9ef3a8396d62ed8ab83489d2504448bf22e3d49c00be2ffc6466f82a7e19a79a
[INFO] running `"docker" "start" "-a" "9ef3a8396d62ed8ab83489d2504448bf22e3d49c00be2ffc6466f82a7e19a79a"`
[INFO] [stderr]     Checking open v1.2.2
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking ctrlc v3.1.3
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking image v0.21.2
[INFO] [stderr]     Checking qtrac-retest v4.0.6 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.17s
[INFO] running `"docker" "inspect" "9ef3a8396d62ed8ab83489d2504448bf22e3d49c00be2ffc6466f82a7e19a79a"`
[INFO] running `"docker" "rm" "-f" "9ef3a8396d62ed8ab83489d2504448bf22e3d49c00be2ffc6466f82a7e19a79a"`
[INFO] [stdout] 9ef3a8396d62ed8ab83489d2504448bf22e3d49c00be2ffc6466f82a7e19a79a