[INFO] updating cached repository https://github.com/felix-pb/rust-challenge-balanced-letters
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 173ad783df6e7de739f75fa70e86fdf4aadd39fb
[INFO] checking felix-pb/rust-challenge-balanced-letters against master#d939f708d960161d23b964309ba68ff207fc0ead for pr-70087
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffelix-pb%2Frust-challenge-balanced-letters" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/felix-pb/rust-challenge-balanced-letters on toolchain d939f708d960161d23b964309ba68ff207fc0ead
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d939f708d960161d23b964309ba68ff207fc0ead" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/felix-pb/rust-challenge-balanced-letters
[INFO] finished tweaking git repo https://github.com/felix-pb/rust-challenge-balanced-letters
[INFO] tweaked toml for git repo https://github.com/felix-pb/rust-challenge-balanced-letters written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/felix-pb/rust-challenge-balanced-letters already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d939f708d960161d23b964309ba68ff207fc0ead" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+d939f708d960161d23b964309ba68ff207fc0ead" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 056c7e42414bf62ba7ba4bbb62c06c9f1e60f9b31940afbf6076975b24dc9239
[INFO] running `"docker" "start" "-a" "056c7e42414bf62ba7ba4bbb62c06c9f1e60f9b31940afbf6076975b24dc9239"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking balance_letters v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.09s
[INFO] running `"docker" "inspect" "056c7e42414bf62ba7ba4bbb62c06c9f1e60f9b31940afbf6076975b24dc9239"`
[INFO] running `"docker" "rm" "-f" "056c7e42414bf62ba7ba4bbb62c06c9f1e60f9b31940afbf6076975b24dc9239"`
[INFO] [stdout] 056c7e42414bf62ba7ba4bbb62c06c9f1e60f9b31940afbf6076975b24dc9239