[INFO] cloning repository https://github.com/lgvier/rust-tracer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lgvier/rust-tracer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flgvier%2Frust-tracer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flgvier%2Frust-tracer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4560764ddcca2dc0328d931dda5d8207620f0dbd
[INFO] documenting lgvier/rust-tracer against 1.55.0 for beta-1.56-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flgvier%2Frust-tracer" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lgvier/rust-tracer on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lgvier/rust-tracer
[INFO] finished tweaking git repo https://github.com/lgvier/rust-tracer
[INFO] tweaked toml for git repo https://github.com/lgvier/rust-tracer written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/lgvier/rust-tracer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3580ea5772f6cf3c1ff3b85d07502fa5abfb0f0b1f920c72486df3e3decc367d
[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" "3580ea5772f6cf3c1ff3b85d07502fa5abfb0f0b1f920c72486df3e3decc367d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3580ea5772f6cf3c1ff3b85d07502fa5abfb0f0b1f920c72486df3e3decc367d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3580ea5772f6cf3c1ff3b85d07502fa5abfb0f0b1f920c72486df3e3decc367d", kill_on_drop: false }`
[INFO] [stdout] 3580ea5772f6cf3c1ff3b85d07502fa5abfb0f0b1f920c72486df3e3decc367d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "RUSTDOCFLAGS=--cap-lints=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7abe552df1b5731f432187649d839948eb117d4b1f702bc48821fa9624d42564
[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" "7abe552df1b5731f432187649d839948eb117d4b1f702bc48821fa9624d42564", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking pad v0.1.6
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking terminal_size v0.1.16
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking rayon v1.5.0
[INFO] [stderr]     Checking console v0.14.0
[INFO] [stderr]     Checking indicatif v0.15.0
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling derive_builder_core v0.9.0
[INFO] [stderr]    Compiling derive_builder v0.9.0
[INFO] [stderr]     Checking rust-tracer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting rust-tracer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not document `rust-tracer`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name chapter09_plane src/bin/chapter09_plane.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern chrono=/opt/rustwide/target/debug/deps/libchrono-080e702f7eff6195.rmeta --extern derive_builder=/opt/rustwide/target/debug/deps/libderive_builder-0166bf845a9cd063.so --extern indicatif=/opt/rustwide/target/debug/deps/libindicatif-7a2df9b48621c002.rmeta --extern pad=/opt/rustwide/target/debug/deps/libpad-42331b5c1a213f8a.rmeta --extern png=/opt/rustwide/target/debug/deps/libpng-4efe612f86328eaf.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-d269bd232b4f9a29.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-14839915ae0e3d75.rmeta --extern rust_tracer=/opt/rustwide/target/debug/deps/librust_tracer-ec007a887f0790f0.rmeta --cap-lints=warn --crate-version 0.1.0` (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" "7abe552df1b5731f432187649d839948eb117d4b1f702bc48821fa9624d42564", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7abe552df1b5731f432187649d839948eb117d4b1f702bc48821fa9624d42564", kill_on_drop: false }`
[INFO] [stdout] 7abe552df1b5731f432187649d839948eb117d4b1f702bc48821fa9624d42564