[INFO] cloning repository https://github.com/matthewaveryusa/rust_samples
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/matthewaveryusa/rust_samples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatthewaveryusa%2Frust_samples", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatthewaveryusa%2Frust_samples'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 09f3e16f25bc88e929a968790886e052849f2769
[INFO] checking matthewaveryusa/rust_samples against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatthewaveryusa%2Frust_samples" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/matthewaveryusa/rust_samples on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/matthewaveryusa/rust_samples
[INFO] finished tweaking git repo https://github.com/matthewaveryusa/rust_samples
[INFO] tweaked toml for git repo https://github.com/matthewaveryusa/rust_samples written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/matthewaveryusa/rust_samples already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 52cdf5dc8c6864c6ed0f81287afe7d08ff65ec9a8a9baf0cdfa4525c1b264be4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "52cdf5dc8c6864c6ed0f81287afe7d08ff65ec9a8a9baf0cdfa4525c1b264be4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52cdf5dc8c6864c6ed0f81287afe7d08ff65ec9a8a9baf0cdfa4525c1b264be4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52cdf5dc8c6864c6ed0f81287afe7d08ff65ec9a8a9baf0cdfa4525c1b264be4", kill_on_drop: false }`
[INFO] [stdout] 52cdf5dc8c6864c6ed0f81287afe7d08ff65ec9a8a9baf0cdfa4525c1b264be4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a51a7dc08cf14756158bfdc557b7c6435decc38f93c01ebf97ff7f4af1d5fe7f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a51a7dc08cf14756158bfdc557b7c6435decc38f93c01ebf97ff7f4af1d5fe7f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking scoreboard v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "a51a7dc08cf14756158bfdc557b7c6435decc38f93c01ebf97ff7f4af1d5fe7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a51a7dc08cf14756158bfdc557b7c6435decc38f93c01ebf97ff7f4af1d5fe7f", kill_on_drop: false }`
[INFO] [stdout] a51a7dc08cf14756158bfdc557b7c6435decc38f93c01ebf97ff7f4af1d5fe7f