[INFO] fetching crate fermium 200.12.4...
[INFO] checking fermium-200.12.4 against master#7f5a42b073dc2bee2aa625052eb066ee07072048 for pr-78991
[INFO] extracting crate fermium 200.12.4 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate fermium 200.12.4 on toolchain 7f5a42b073dc2bee2aa625052eb066ee07072048
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fermium 200.12.4
[INFO] finished tweaking crates.io crate fermium 200.12.4
[INFO] tweaked toml for crates.io crate fermium 200.12.4 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate fermium 200.12.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "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" "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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "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] 7a237527caf11bb1644dfb70b0c30b05b31491e31b26b5b7486e1e2d4371cc0b
[INFO] running `Command { std: "docker" "start" "-a" "7a237527caf11bb1644dfb70b0c30b05b31491e31b26b5b7486e1e2d4371cc0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a237527caf11bb1644dfb70b0c30b05b31491e31b26b5b7486e1e2d4371cc0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a237527caf11bb1644dfb70b0c30b05b31491e31b26b5b7486e1e2d4371cc0b", kill_on_drop: false }`
[INFO] [stdout] 7a237527caf11bb1644dfb70b0c30b05b31491e31b26b5b7486e1e2d4371cc0b
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 981e396d6474b1fdd2ed051e4b43c047874aa187de08c9d85a74b75abd3d9dd4
[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" "981e396d6474b1fdd2ed051e4b43c047874aa187de08c9d85a74b75abd3d9dd4", kill_on_drop: false }`
[INFO] [stderr]    Compiling fermium v200.12.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking chlorine v1.0.5
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.05s
[INFO] running `Command { std: "docker" "inspect" "981e396d6474b1fdd2ed051e4b43c047874aa187de08c9d85a74b75abd3d9dd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "981e396d6474b1fdd2ed051e4b43c047874aa187de08c9d85a74b75abd3d9dd4", kill_on_drop: false }`
[INFO] [stdout] 981e396d6474b1fdd2ed051e4b43c047874aa187de08c9d85a74b75abd3d9dd4