[INFO] fetching crate summon 0.3.1...
[INFO] checking summon-0.3.1 against master#7750c3d46bc19784adb1ee6e37a5ec7e4cd7e772 for pr-73084-1
[INFO] extracting crate summon 0.3.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate summon 0.3.1 on toolchain 7750c3d46bc19784adb1ee6e37a5ec7e4cd7e772
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7750c3d46bc19784adb1ee6e37a5ec7e4cd7e772" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate summon 0.3.1
[INFO] finished tweaking crates.io crate summon 0.3.1
[INFO] tweaked toml for crates.io crate summon 0.3.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7750c3d46bc19784adb1ee6e37a5ec7e4cd7e772" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7750c3d46bc19784adb1ee6e37a5ec7e4cd7e772" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "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" "+7750c3d46bc19784adb1ee6e37a5ec7e4cd7e772" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 26a4eed505b783d00c17814d326884d2080196b4721287d559a613a82988a8a8
[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" "26a4eed505b783d00c17814d326884d2080196b4721287d559a613a82988a8a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26a4eed505b783d00c17814d326884d2080196b4721287d559a613a82988a8a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26a4eed505b783d00c17814d326884d2080196b4721287d559a613a82988a8a8", kill_on_drop: false }`
[INFO] [stdout] 26a4eed505b783d00c17814d326884d2080196b4721287d559a613a82988a8a8
[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" "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" "+7750c3d46bc19784adb1ee6e37a5ec7e4cd7e772" "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] cd6be53e08787459fe252c4f9b09dae211a1bdc64a2d47e03ea579a2f95908a8
[INFO] running `Command { std: "docker" "start" "-a" "cd6be53e08787459fe252c4f9b09dae211a1bdc64a2d47e03ea579a2f95908a8", kill_on_drop: false }`
[INFO] [stderr]     Checking summon v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "cd6be53e08787459fe252c4f9b09dae211a1bdc64a2d47e03ea579a2f95908a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd6be53e08787459fe252c4f9b09dae211a1bdc64a2d47e03ea579a2f95908a8", kill_on_drop: false }`
[INFO] [stdout] cd6be53e08787459fe252c4f9b09dae211a1bdc64a2d47e03ea579a2f95908a8