[INFO] cloning repository https://github.com/nt591/understanding_computation_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nt591/understanding_computation_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnt591%2Funderstanding_computation_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnt591%2Funderstanding_computation_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0975c8c1c337353055228aa1bc6a160c47dc8c33
[INFO] checking nt591/understanding_computation_rust against try#15a786332e2f0dd343b226ab6bb8ec028a350f73 for pr-81782
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnt591%2Funderstanding_computation_rust" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nt591/understanding_computation_rust on toolchain 15a786332e2f0dd343b226ab6bb8ec028a350f73
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nt591/understanding_computation_rust
[INFO] finished tweaking git repo https://github.com/nt591/understanding_computation_rust
[INFO] tweaked toml for git repo https://github.com/nt591/understanding_computation_rust written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/nt591/understanding_computation_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b078f3a9841ec3bb27a90b3df6b0080ad285387ac860971bda49cdfa2dbf97b2
[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" "b078f3a9841ec3bb27a90b3df6b0080ad285387ac860971bda49cdfa2dbf97b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b078f3a9841ec3bb27a90b3df6b0080ad285387ac860971bda49cdfa2dbf97b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b078f3a9841ec3bb27a90b3df6b0080ad285387ac860971bda49cdfa2dbf97b2", kill_on_drop: false }`
[INFO] [stdout] b078f3a9841ec3bb27a90b3df6b0080ad285387ac860971bda49cdfa2dbf97b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f4fb52f9362a497c4096a10fa9493affdf423ef06bdff6094151499bfba066be
[INFO] running `Command { std: "docker" "start" "-a" "f4fb52f9362a497c4096a10fa9493affdf423ef06bdff6094151499bfba066be", kill_on_drop: false }`
[INFO] [stderr]     Checking understanding_computation v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "f4fb52f9362a497c4096a10fa9493affdf423ef06bdff6094151499bfba066be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4fb52f9362a497c4096a10fa9493affdf423ef06bdff6094151499bfba066be", kill_on_drop: false }`
[INFO] [stdout] f4fb52f9362a497c4096a10fa9493affdf423ef06bdff6094151499bfba066be