[INFO] cloning repository https://github.com/jeysal/rust-uml-to-dot-concept
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jeysal/rust-uml-to-dot-concept" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeysal%2Frust-uml-to-dot-concept", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeysal%2Frust-uml-to-dot-concept'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8d075805c4eec603906cc1909b04eafa35f40101
[INFO] checking jeysal/rust-uml-to-dot-concept against master#339e19697a39a78f4d669c217b7d21109215de41 for pr-81213
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeysal%2Frust-uml-to-dot-concept" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jeysal/rust-uml-to-dot-concept on toolchain 339e19697a39a78f4d669c217b7d21109215de41
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jeysal/rust-uml-to-dot-concept
[INFO] finished tweaking git repo https://github.com/jeysal/rust-uml-to-dot-concept
[INFO] tweaked toml for git repo https://github.com/jeysal/rust-uml-to-dot-concept written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/jeysal/rust-uml-to-dot-concept already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+339e19697a39a78f4d669c217b7d21109215de41" "metadata" "--no-deps" "--format-version=1", 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] 536de253f3965c15f90ada51f0d5cb86743b347f1266e933f1f362577d7416cf
[INFO] running `Command { std: "docker" "start" "-a" "536de253f3965c15f90ada51f0d5cb86743b347f1266e933f1f362577d7416cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "536de253f3965c15f90ada51f0d5cb86743b347f1266e933f1f362577d7416cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "536de253f3965c15f90ada51f0d5cb86743b347f1266e933f1f362577d7416cf", kill_on_drop: false }`
[INFO] [stdout] 536de253f3965c15f90ada51f0d5cb86743b347f1266e933f1f362577d7416cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+339e19697a39a78f4d669c217b7d21109215de41" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fcc51fea2a1c36208ef4c153a327da45af476b91f53f7065d6c3a7b2c4ab48f5
[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" "fcc51fea2a1c36208ef4c153a327da45af476b91f53f7065d6c3a7b2c4ab48f5", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking dot v0.1.4
[INFO] [stderr]     Checking itertools v0.7.8
[INFO] [stderr]     Checking memchr v2.0.2
[INFO] [stderr]     Checking nom v4.0.0
[INFO] [stderr]     Checking uml v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.82s
[INFO] running `Command { std: "docker" "inspect" "fcc51fea2a1c36208ef4c153a327da45af476b91f53f7065d6c3a7b2c4ab48f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcc51fea2a1c36208ef4c153a327da45af476b91f53f7065d6c3a7b2c4ab48f5", kill_on_drop: false }`
[INFO] [stdout] fcc51fea2a1c36208ef4c153a327da45af476b91f53f7065d6c3a7b2c4ab48f5