[INFO] fetching crate perf-event 0.4.7...
[INFO] checking perf-event-0.4.7 against master#50e1dc1536264ab71c0850f346b12309477f29f7 for pr-85073
[INFO] extracting crate perf-event 0.4.7 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate perf-event 0.4.7 on toolchain 50e1dc1536264ab71c0850f346b12309477f29f7
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate perf-event 0.4.7
[INFO] finished tweaking crates.io crate perf-event 0.4.7
[INFO] tweaked toml for crates.io crate perf-event 0.4.7 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate perf-event 0.4.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4aab58703c7e40052f78868911972aadd36ca27c7e09e49a158e12c771fb59f8
[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" "4aab58703c7e40052f78868911972aadd36ca27c7e09e49a158e12c771fb59f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4aab58703c7e40052f78868911972aadd36ca27c7e09e49a158e12c771fb59f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4aab58703c7e40052f78868911972aadd36ca27c7e09e49a158e12c771fb59f8", kill_on_drop: false }`
[INFO] [stdout] 4aab58703c7e40052f78868911972aadd36ca27c7e09e49a158e12c771fb59f8
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "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] 54654bf0343c1a2d5c35b3de93c85a07029adcddc8350c8a2abef99958c1f9c9
[INFO] running `Command { std: "docker" "start" "-a" "54654bf0343c1a2d5c35b3de93c85a07029adcddc8350c8a2abef99958c1f9c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]     Checking perf-event-open-sys v1.0.0
[INFO] [stderr]     Checking perf-event v0.4.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.83s
[INFO] running `Command { std: "docker" "inspect" "54654bf0343c1a2d5c35b3de93c85a07029adcddc8350c8a2abef99958c1f9c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54654bf0343c1a2d5c35b3de93c85a07029adcddc8350c8a2abef99958c1f9c9", kill_on_drop: false }`
[INFO] [stdout] 54654bf0343c1a2d5c35b3de93c85a07029adcddc8350c8a2abef99958c1f9c9