[INFO] updating cached repository bluecereal/collatz_conjecture
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/bluecereal/collatz_conjecture
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/bluecereal/collatz_conjecture" "work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/bluecereal/collatz_conjecture"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/bluecereal/collatz_conjecture'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/bluecereal/collatz_conjecture" "work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/bluecereal/collatz_conjecture"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/bluecereal/collatz_conjecture'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 754bf4373fc47bef95f75f7099b83aaa79e80653
[INFO] sha for GitHub repo bluecereal/collatz_conjecture: 754bf4373fc47bef95f75f7099b83aaa79e80653
[INFO] validating manifest of bluecereal/collatz_conjecture on toolchain master#39401465da4ce27aeeb2c2a26133ac35c63aa515
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of bluecereal/collatz_conjecture on toolchain try#f45cc3094ee337acd688771b9234318046b0572d
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing bluecereal/collatz_conjecture
[INFO] finished frobbing bluecereal/collatz_conjecture
[INFO] frobbed toml for bluecereal/collatz_conjecture written to work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/bluecereal/collatz_conjecture/Cargo.toml
[INFO] started frobbing bluecereal/collatz_conjecture
[INFO] finished frobbing bluecereal/collatz_conjecture
[INFO] frobbed toml for bluecereal/collatz_conjecture written to work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/bluecereal/collatz_conjecture/Cargo.toml
[INFO] crate bluecereal/collatz_conjecture already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking bluecereal/collatz_conjecture against try#f45cc3094ee337acd688771b9234318046b0572d for pr-60914
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60914/worker-6/try#f45cc3094ee337acd688771b9234318046b0572d:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/bluecereal/collatz_conjecture:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 889b0f34c7bb736869630b21af5ea7232baf38d2de2b0ccb6a30f11ab9dbc025
[INFO] running `"docker" "start" "-a" "889b0f34c7bb736869630b21af5ea7232baf38d2de2b0ccb6a30f11ab9dbc025"`
[INFO] [stderr]     Checking collatz v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `"docker" "inspect" "889b0f34c7bb736869630b21af5ea7232baf38d2de2b0ccb6a30f11ab9dbc025"`
[INFO] running `"docker" "rm" "-f" "889b0f34c7bb736869630b21af5ea7232baf38d2de2b0ccb6a30f11ab9dbc025"`
[INFO] [stdout] 889b0f34c7bb736869630b21af5ea7232baf38d2de2b0ccb6a30f11ab9dbc025