[INFO] updating cached repository dckc/snakes-ladders
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dckc/snakes-ladders
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dckc/snakes-ladders" "work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/dckc/snakes-ladders"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/dckc/snakes-ladders'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dckc/snakes-ladders" "work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/dckc/snakes-ladders"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/dckc/snakes-ladders'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fea15b696ffd3eabcea308a679d6f857a29588f7
[INFO] sha for GitHub repo dckc/snakes-ladders: fea15b696ffd3eabcea308a679d6f857a29588f7
[INFO] validating manifest of dckc/snakes-ladders on toolchain master#1891bfa80364eead426517c68de6947b7692e2de
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dckc/snakes-ladders on toolchain try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing dckc/snakes-ladders
[INFO] finished frobbing dckc/snakes-ladders
[INFO] frobbed toml for dckc/snakes-ladders written to work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/dckc/snakes-ladders/Cargo.toml
[INFO] started frobbing dckc/snakes-ladders
[INFO] finished frobbing dckc/snakes-ladders
[INFO] frobbed toml for dckc/snakes-ladders written to work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/dckc/snakes-ladders/Cargo.toml
[INFO] crate dckc/snakes-ladders already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking dckc/snakes-ladders against try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a for pr-60261
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60261/worker-5/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/dckc/snakes-ladders:/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" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0e0c012588d62dab4b23c78390ae0b821fda5d8dabe67ce73ee9ad2acac3d9d3
[INFO] running `"docker" "start" "-a" "0e0c012588d62dab4b23c78390ae0b821fda5d8dabe67ce73ee9ad2acac3d9d3"`
[INFO] [stderr]     Checking assign4 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `"docker" "inspect" "0e0c012588d62dab4b23c78390ae0b821fda5d8dabe67ce73ee9ad2acac3d9d3"`
[INFO] running `"docker" "rm" "-f" "0e0c012588d62dab4b23c78390ae0b821fda5d8dabe67ce73ee9ad2acac3d9d3"`
[INFO] [stdout] 0e0c012588d62dab4b23c78390ae0b821fda5d8dabe67ce73ee9ad2acac3d9d3