[INFO] updating cached repository luxn/flut
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/luxn/flut
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/luxn/flut" "work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/luxn/flut"`
[INFO] [stderr] Cloning into 'work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/luxn/flut'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/luxn/flut" "work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/luxn/flut"`
[INFO] [stderr] Cloning into 'work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/luxn/flut'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 294d41a24ebe241bb75413f01d8c939f87aff1e0
[INFO] sha for GitHub repo luxn/flut: 294d41a24ebe241bb75413f01d8c939f87aff1e0
[INFO] validating manifest of luxn/flut on toolchain master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0bbc3927e28c22edefe6a1353b5ecc95ea9a104-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of luxn/flut on toolchain try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b9139d2caca1db46014a9c302d5c47cfae0d8ae0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing luxn/flut
[INFO] finished frobbing luxn/flut
[INFO] frobbed toml for luxn/flut written to work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/luxn/flut/Cargo.toml
[INFO] started frobbing luxn/flut
[INFO] finished frobbing luxn/flut
[INFO] frobbed toml for luxn/flut written to work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/luxn/flut/Cargo.toml
[INFO] crate luxn/flut has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0bbc3927e28c22edefe6a1353b5ecc95ea9a104-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b9139d2caca1db46014a9c302d5c47cfae0d8ae0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking luxn/flut against try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0 for pr-57321
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57321/worker-3/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/luxn/flut:/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" "+b9139d2caca1db46014a9c302d5c47cfae0d8ae0-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 760f195af5b6b8fa55618b7e77220b4dfbbff1414afe50a1b2e0dc6cea67a96e
[INFO] running `"docker" "start" "-a" "760f195af5b6b8fa55618b7e77220b4dfbbff1414afe50a1b2e0dc6cea67a96e"`
[INFO] [stderr]     Checking serde_yaml v0.8.7
[INFO] [stderr]    Compiling syn v0.15.21
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]     Checking flut v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.55s
[INFO] running `"docker" "inspect" "760f195af5b6b8fa55618b7e77220b4dfbbff1414afe50a1b2e0dc6cea67a96e"`
[INFO] running `"docker" "rm" "-f" "760f195af5b6b8fa55618b7e77220b4dfbbff1414afe50a1b2e0dc6cea67a96e"`
[INFO] [stdout] 760f195af5b6b8fa55618b7e77220b4dfbbff1414afe50a1b2e0dc6cea67a96e