[INFO] fetching crate r1 0.6.4...
[INFO] checking r1-0.6.4 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate r1 0.6.4 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate r1 0.6.4 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate r1 0.6.4
[INFO] finished tweaking crates.io crate r1 0.6.4
[INFO] tweaked toml for crates.io crate r1 0.6.4 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate r1 0.6.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ff135cbe57c93da6850433e0174912f2dee1daba9b91f98d2ac03291eba006a
[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" "1ff135cbe57c93da6850433e0174912f2dee1daba9b91f98d2ac03291eba006a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ff135cbe57c93da6850433e0174912f2dee1daba9b91f98d2ac03291eba006a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ff135cbe57c93da6850433e0174912f2dee1daba9b91f98d2ac03291eba006a", kill_on_drop: false }`
[INFO] [stdout] 1ff135cbe57c93da6850433e0174912f2dee1daba9b91f98d2ac03291eba006a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4624a333e7180e5525c364fef3622fd225f3f6752868ebf1bd2cfba3e389ab95
[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" "4624a333e7180e5525c364fef3622fd225f3f6752868ebf1bd2cfba3e389ab95", kill_on_drop: false }`
[INFO] [stderr]     Checking r1 v0.6.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "4624a333e7180e5525c364fef3622fd225f3f6752868ebf1bd2cfba3e389ab95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4624a333e7180e5525c364fef3622fd225f3f6752868ebf1bd2cfba3e389ab95", kill_on_drop: false }`
[INFO] [stdout] 4624a333e7180e5525c364fef3622fd225f3f6752868ebf1bd2cfba3e389ab95