[INFO] updating cached repository NoahTheDuke/rust_ackermann
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/NoahTheDuke/rust_ackermann
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/NoahTheDuke/rust_ackermann" "work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/NoahTheDuke/rust_ackermann"`
[INFO] [stderr] Cloning into 'work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/NoahTheDuke/rust_ackermann'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/NoahTheDuke/rust_ackermann" "work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/NoahTheDuke/rust_ackermann"`
[INFO] [stderr] Cloning into 'work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/NoahTheDuke/rust_ackermann'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5253f63b823de6ed03cb5f63bf028e1dd3cc3424
[INFO] sha for GitHub repo NoahTheDuke/rust_ackermann: 5253f63b823de6ed03cb5f63bf028e1dd3cc3424
[INFO] validating manifest of NoahTheDuke/rust_ackermann on toolchain master#d99a320cba42f661aebfa1293b7b2ec3603dda75
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of NoahTheDuke/rust_ackermann on toolchain try#e70472fc501b855c9080f3772432c10fe20b8866
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing NoahTheDuke/rust_ackermann
[INFO] finished frobbing NoahTheDuke/rust_ackermann
[INFO] frobbed toml for NoahTheDuke/rust_ackermann written to work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/NoahTheDuke/rust_ackermann/Cargo.toml
[INFO] started frobbing NoahTheDuke/rust_ackermann
[INFO] finished frobbing NoahTheDuke/rust_ackermann
[INFO] frobbed toml for NoahTheDuke/rust_ackermann written to work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/NoahTheDuke/rust_ackermann/Cargo.toml
[INFO] crate NoahTheDuke/rust_ackermann has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking NoahTheDuke/rust_ackermann against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/NoahTheDuke/rust_ackermann:/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"`
[INFO] [stdout] dc017ddde195bbc9393c454277b2c2852a424023ba961aa79796a8a8caa830cb
[INFO] running `"docker" "start" "-a" "dc017ddde195bbc9393c454277b2c2852a424023ba961aa79796a8a8caa830cb"`
[INFO] [stderr]     Checking ackermann v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `"docker" "inspect" "dc017ddde195bbc9393c454277b2c2852a424023ba961aa79796a8a8caa830cb"`
[INFO] running `"docker" "rm" "-f" "dc017ddde195bbc9393c454277b2c2852a424023ba961aa79796a8a8caa830cb"`
[INFO] [stdout] dc017ddde195bbc9393c454277b2c2852a424023ba961aa79796a8a8caa830cb