[INFO] fetching crate mcr 0.2.1...
[INFO] checking mcr-0.2.1 against try#6024cfef3a82f9a7688f07054f1650081bad3af5 for pr-74130
[INFO] extracting crate mcr 0.2.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate mcr 0.2.1 on toolchain 6024cfef3a82f9a7688f07054f1650081bad3af5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mcr 0.2.1
[INFO] finished tweaking crates.io crate mcr 0.2.1
[INFO] tweaked toml for crates.io crate mcr 0.2.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate mcr 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "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] 7914914c16dc544517b1aa8ac05f2b6b0d9df7d2e359fcb3d3b293571a8e8fdd
[INFO] running `Command { std: "docker" "start" "-a" "7914914c16dc544517b1aa8ac05f2b6b0d9df7d2e359fcb3d3b293571a8e8fdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7914914c16dc544517b1aa8ac05f2b6b0d9df7d2e359fcb3d3b293571a8e8fdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7914914c16dc544517b1aa8ac05f2b6b0d9df7d2e359fcb3d3b293571a8e8fdd", kill_on_drop: false }`
[INFO] [stdout] 7914914c16dc544517b1aa8ac05f2b6b0d9df7d2e359fcb3d3b293571a8e8fdd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53c919d819a30de3a1d317fec0d75f28549d89f4a401f2ba8360908cc04f1936
[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" "53c919d819a30de3a1d317fec0d75f28549d89f4a401f2ba8360908cc04f1936", kill_on_drop: false }`
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking mcr v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.23s
[INFO] running `Command { std: "docker" "inspect" "53c919d819a30de3a1d317fec0d75f28549d89f4a401f2ba8360908cc04f1936", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53c919d819a30de3a1d317fec0d75f28549d89f4a401f2ba8360908cc04f1936", kill_on_drop: false }`
[INFO] [stdout] 53c919d819a30de3a1d317fec0d75f28549d89f4a401f2ba8360908cc04f1936