[INFO] updating cached repository https://github.com/hhatto/wwup-in-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7ef78053e5a0447048fafc7824dd7adb64c60c12
[INFO] documenting hhatto/wwup-in-rust against try#66dfc4e010913fbed0c4ea91fc2c010004b0f441 for pr-73566
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhhatto%2Fwwup-in-rust" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hhatto/wwup-in-rust on toolchain 66dfc4e010913fbed0c4ea91fc2c010004b0f441
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hhatto/wwup-in-rust
[INFO] finished tweaking git repo https://github.com/hhatto/wwup-in-rust
[INFO] tweaked toml for git repo https://github.com/hhatto/wwup-in-rust written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/hhatto/wwup-in-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 72d92abd59d7c4da4992df8bab9a790373f8f82ff9b2011d19675b0a46f1a1cf
[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" "72d92abd59d7c4da4992df8bab9a790373f8f82ff9b2011d19675b0a46f1a1cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72d92abd59d7c4da4992df8bab9a790373f8f82ff9b2011d19675b0a46f1a1cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72d92abd59d7c4da4992df8bab9a790373f8f82ff9b2011d19675b0a46f1a1cf", kill_on_drop: false }`
[INFO] [stdout] 72d92abd59d7c4da4992df8bab9a790373f8f82ff9b2011d19675b0a46f1a1cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "RUSTDOCFLAGS=--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" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97a67e444e5c1f0163cfdd7e744bca64a6abb01245b0d69d8a59cbffcbafd9f7
[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" "97a67e444e5c1f0163cfdd7e744bca64a6abb01245b0d69d8a59cbffcbafd9f7", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.21
[INFO] [stderr]     Checking cfg-if v0.1.0
[INFO] [stderr]     Checking bit-vec v0.4.3
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]    Compiling nix v0.7.0
[INFO] [stderr]     Checking bit-set v0.4.0
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking nix v0.8.1
[INFO] [stderr]     Checking chan v0.1.19
[INFO] [stderr]     Checking chan-signal v0.2.0
[INFO] [stderr]     Checking prctl v1.0.0
[INFO] [stderr]  Documenting wwup v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: Could not document `wwup`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name 9_processes_have_names src/9_processes_have_names.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern chan=/opt/rustwide/target/debug/deps/libchan-27e9e08de9399324.rmeta --extern chan_signal=/opt/rustwide/target/debug/deps/libchan_signal-290f8cb603cb9a5e.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-8d2ffac1a4c0a952.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-2d54f44b0bf767f6.rmeta --extern prctl=/opt/rustwide/target/debug/deps/libprctl-4a8999b53dc80623.rmeta --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "97a67e444e5c1f0163cfdd7e744bca64a6abb01245b0d69d8a59cbffcbafd9f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97a67e444e5c1f0163cfdd7e744bca64a6abb01245b0d69d8a59cbffcbafd9f7", kill_on_drop: false }`
[INFO] [stdout] 97a67e444e5c1f0163cfdd7e744bca64a6abb01245b0d69d8a59cbffcbafd9f7