[INFO] updating cached repository https://github.com/kardeiz/rayon-issue
[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] a7574ecc4b00d990e5aee2a321609d0982cc23fc
[INFO] documenting kardeiz/rayon-issue against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkardeiz%2Frayon-issue" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kardeiz/rayon-issue on toolchain 394e1b40d264aa6928811919c1124fa248e7d802
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kardeiz/rayon-issue
[INFO] finished tweaking git repo https://github.com/kardeiz/rayon-issue
[INFO] tweaked toml for git repo https://github.com/kardeiz/rayon-issue written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/kardeiz/rayon-issue already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+394e1b40d264aa6928811919c1124fa248e7d802" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b103cd1e461bcc1cb1de1f8179ce5f7779c9d93dd66050f04ed90fbf1c988c59
[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" "b103cd1e461bcc1cb1de1f8179ce5f7779c9d93dd66050f04ed90fbf1c988c59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b103cd1e461bcc1cb1de1f8179ce5f7779c9d93dd66050f04ed90fbf1c988c59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b103cd1e461bcc1cb1de1f8179ce5f7779c9d93dd66050f04ed90fbf1c988c59", kill_on_drop: false }`
[INFO] [stdout] b103cd1e461bcc1cb1de1f8179ce5f7779c9d93dd66050f04ed90fbf1c988c59
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+394e1b40d264aa6928811919c1124fa248e7d802" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff3ed00d9d80921c1d8b77f7ffa14d3e06336d83973150085a99daca839febae
[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" "ff3ed00d9d80921c1d8b77f7ffa14d3e06336d83973150085a99daca839febae", kill_on_drop: false }`
[INFO] [stderr]    Compiling gcc v0.3.40
[INFO] [stderr]     Checking serde_json v0.9.9
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking num_cpus v1.2.1
[INFO] [stderr]    Compiling syn v0.11.8
[INFO] [stderr]     Checking deque v0.3.1
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking rayon v0.6.0
[INFO] [stderr]    Compiling serde_codegen_internals v0.14.1
[INFO] [stderr]    Compiling serde_derive v0.9.11
[INFO] [stderr]  Documenting rayon-issue v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/main.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(custom_attribute)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in favor of `#![register_tool]` and `#![register_attr]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `rayon-issue`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name rayon_issue src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern rayon=/opt/rustwide/target/debug/deps/librayon-3eb68331ea9a3a26.rmeta --extern crypto=/opt/rustwide/target/debug/deps/libcrypto-f50cf1f58c46fce1.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-a686ad0b47055025.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-d692f7af2c8f9b90.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-00c1f166c28ae8e6.rmeta --cap-lints=forbid` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "ff3ed00d9d80921c1d8b77f7ffa14d3e06336d83973150085a99daca839febae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff3ed00d9d80921c1d8b77f7ffa14d3e06336d83973150085a99daca839febae", kill_on_drop: false }`
[INFO] [stdout] ff3ed00d9d80921c1d8b77f7ffa14d3e06336d83973150085a99daca839febae