[INFO] fetching crate treeproxy 0.0.0...
[INFO] checking treeproxy-0.0.0 against master#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502
[INFO] extracting crate treeproxy 0.0.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate treeproxy 0.0.0 on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate treeproxy 0.0.0
[INFO] finished tweaking crates.io crate treeproxy 0.0.0
[INFO] tweaked toml for crates.io crate treeproxy 0.0.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate treeproxy 0.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "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] 1c3b24f82be81c62f5e93139338e2d4fd6ded9529b5a64402b2788adf61e36cb
[INFO] running `Command { std: "docker" "start" "-a" "1c3b24f82be81c62f5e93139338e2d4fd6ded9529b5a64402b2788adf61e36cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c3b24f82be81c62f5e93139338e2d4fd6ded9529b5a64402b2788adf61e36cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c3b24f82be81c62f5e93139338e2d4fd6ded9529b5a64402b2788adf61e36cb", kill_on_drop: false }`
[INFO] [stdout] 1c3b24f82be81c62f5e93139338e2d4fd6ded9529b5a64402b2788adf61e36cb
[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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d87047b5f0a9c3827e1b1e25278af0f2cdd69af2b43ef5409e007e8a619ac372
[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" "d87047b5f0a9c3827e1b1e25278af0f2cdd69af2b43ef5409e007e8a619ac372", kill_on_drop: false }`
[INFO] [stderr]     Checking treeproxy v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "d87047b5f0a9c3827e1b1e25278af0f2cdd69af2b43ef5409e007e8a619ac372", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d87047b5f0a9c3827e1b1e25278af0f2cdd69af2b43ef5409e007e8a619ac372", kill_on_drop: false }`
[INFO] [stdout] d87047b5f0a9c3827e1b1e25278af0f2cdd69af2b43ef5409e007e8a619ac372