[INFO] fetching crate dmux 0.6.2...
[INFO] checking dmux-0.6.2 against master#2ad5292aea6328113b55968b4322528d48261316 for pr-80243
[INFO] extracting crate dmux 0.6.2 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate dmux 0.6.2 on toolchain 2ad5292aea6328113b55968b4322528d48261316
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dmux 0.6.2
[INFO] finished tweaking crates.io crate dmux 0.6.2
[INFO] tweaked toml for crates.io crate dmux 0.6.2 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate dmux 0.6.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "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] 4e7f3770f95b6dc53a964e89b5424fc3b5d49e3d54e373034f0e1b37e9ab5aa5
[INFO] running `Command { std: "docker" "start" "-a" "4e7f3770f95b6dc53a964e89b5424fc3b5d49e3d54e373034f0e1b37e9ab5aa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e7f3770f95b6dc53a964e89b5424fc3b5d49e3d54e373034f0e1b37e9ab5aa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e7f3770f95b6dc53a964e89b5424fc3b5d49e3d54e373034f0e1b37e9ab5aa5", kill_on_drop: false }`
[INFO] [stdout] 4e7f3770f95b6dc53a964e89b5424fc3b5d49e3d54e373034f0e1b37e9ab5aa5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "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] d97fbfb35842a52826fa6afe54916d00822fd0fda153545c0f87018adbe22967
[INFO] running `Command { std: "docker" "start" "-a" "d97fbfb35842a52826fa6afe54916d00822fd0fda153545c0f87018adbe22967", kill_on_drop: false }`
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]    Compiling anyhow v1.0.32
[INFO] [stderr]     Checking rust-ini v0.13.0
[INFO] [stderr]     Checking tmux_interface v0.0.6
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]     Checking yaml-rust v0.4.3
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]    Compiling lexical-core v0.6.2
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking globset v0.4.5
[INFO] [stderr]     Checking grep-cli v0.1.4
[INFO] [stderr]     Checking serde_test v0.8.23
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking serde-hjson v0.9.1
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]     Checking config v0.10.1
[INFO] [stderr]     Checking dmux v0.6.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.05s
[INFO] running `Command { std: "docker" "inspect" "d97fbfb35842a52826fa6afe54916d00822fd0fda153545c0f87018adbe22967", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d97fbfb35842a52826fa6afe54916d00822fd0fda153545c0f87018adbe22967", kill_on_drop: false }`
[INFO] [stdout] d97fbfb35842a52826fa6afe54916d00822fd0fda153545c0f87018adbe22967