[INFO] cloning repository https://github.com/caspark/character-frequency-analyser
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/caspark/character-frequency-analyser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaspark%2Fcharacter-frequency-analyser"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaspark%2Fcharacter-frequency-analyser'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8b0450f8b9377ce3068107bfc697614156491173
[INFO] checking caspark/character-frequency-analyser against master#914adf04af1c1a984707f778da3d04590c03d144 for pr-72331
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaspark%2Fcharacter-frequency-analyser" "/workspace/builds/worker-10/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/caspark/character-frequency-analyser on toolchain 914adf04af1c1a984707f778da3d04590c03d144
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/caspark/character-frequency-analyser
[INFO] finished tweaking git repo https://github.com/caspark/character-frequency-analyser
[INFO] tweaked toml for git repo https://github.com/caspark/character-frequency-analyser written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/caspark/character-frequency-analyser already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+914adf04af1c1a984707f778da3d04590c03d144" "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] bf40697fa0e3d592564adfd7f2ec7387d4a5f48e8fa94caa93ef5ca99f2b88f7
[INFO] running `"docker" "start" "-a" "bf40697fa0e3d592564adfd7f2ec7387d4a5f48e8fa94caa93ef5ca99f2b88f7"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling embed-resource v1.3.3
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]    Compiling char-freq v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking fern v0.6.0
[INFO] [stderr]     Checking globset v0.4.5
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking ignore v0.4.15
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.47s
[INFO] running `"docker" "inspect" "bf40697fa0e3d592564adfd7f2ec7387d4a5f48e8fa94caa93ef5ca99f2b88f7"`
[INFO] running `"docker" "rm" "-f" "bf40697fa0e3d592564adfd7f2ec7387d4a5f48e8fa94caa93ef5ca99f2b88f7"`
[INFO] [stdout] bf40697fa0e3d592564adfd7f2ec7387d4a5f48e8fa94caa93ef5ca99f2b88f7