[INFO] fetching crate rbtree 0.1.5...
[INFO] documenting rbtree-0.1.5 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate rbtree 0.1.5 into /workspace/builds/worker-18/source
[INFO] validating manifest of crates.io crate rbtree 0.1.5 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rbtree 0.1.5
[INFO] finished tweaking crates.io crate rbtree 0.1.5
[INFO] tweaked toml for crates.io crate rbtree 0.1.5 written to /workspace/builds/worker-18/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 823cf1e8217a593a5383da6dfa23111a7f651c94f44d8478015b17566dea659c
[INFO] running `Command { std: "docker" "start" "-a" "823cf1e8217a593a5383da6dfa23111a7f651c94f44d8478015b17566dea659c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "823cf1e8217a593a5383da6dfa23111a7f651c94f44d8478015b17566dea659c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "823cf1e8217a593a5383da6dfa23111a7f651c94f44d8478015b17566dea659c", kill_on_drop: false }`
[INFO] [stdout] 823cf1e8217a593a5383da6dfa23111a7f651c94f44d8478015b17566dea659c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d7dc89d78694d49d450e296fb1b7a3c46fc58d0e9ab2f943eb9baab8af0394b2
[INFO] running `Command { std: "docker" "start" "-a" "d7dc89d78694d49d450e296fb1b7a3c46fc58d0e9ab2f943eb9baab8af0394b2", kill_on_drop: false }`
[INFO] [stderr]  Documenting rbtree v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:491:34
[INFO] [stdout]     |
[INFO] [stdout] 491 |     fn next(&mut self) -> Option<(&'a K)> {
[INFO] [stdout]     |                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 491 -     fn next(&mut self) -> Option<(&'a K)> {
[INFO] [stdout] 491 +     fn next(&mut self) -> Option<&'a K> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:535:34
[INFO] [stdout]     |
[INFO] [stdout] 535 |     fn next(&mut self) -> Option<(&'a V)> {
[INFO] [stdout]     |                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 535 -     fn next(&mut self) -> Option<(&'a V)> {
[INFO] [stdout] 535 +     fn next(&mut self) -> Option<&'a V> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:581:34
[INFO] [stdout]     |
[INFO] [stdout] 581 |     fn next(&mut self) -> Option<(&'a mut V)> {
[INFO] [stdout]     |                                  ^         ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 581 -     fn next(&mut self) -> Option<(&'a mut V)> {
[INFO] [stdout] 581 +     fn next(&mut self) -> Option<&'a mut V> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.31s
[INFO] running `Command { std: "docker" "inspect" "d7dc89d78694d49d450e296fb1b7a3c46fc58d0e9ab2f943eb9baab8af0394b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7dc89d78694d49d450e296fb1b7a3c46fc58d0e9ab2f943eb9baab8af0394b2", kill_on_drop: false }`
[INFO] [stdout] d7dc89d78694d49d450e296fb1b7a3c46fc58d0e9ab2f943eb9baab8af0394b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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=warn" "-e" "DOCS_RS=1" "-e" "RUSTC_BOOTSTRAP=1" "-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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] 6b2bf9fef1fb32e22159594127da323c11b085fe723cea520bd9e1f21833698c
[INFO] running `Command { std: "docker" "start" "-a" "6b2bf9fef1fb32e22159594127da323c11b085fe723cea520bd9e1f21833698c", kill_on_drop: false }`
[INFO] [stderr]  Documenting rbtree v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:491:34
[INFO] [stdout]     |
[INFO] [stdout] 491 |     fn next(&mut self) -> Option<(&'a K)> {
[INFO] [stdout]     |                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 491 -     fn next(&mut self) -> Option<(&'a K)> {
[INFO] [stdout] 491 +     fn next(&mut self) -> Option<&'a K> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:535:34
[INFO] [stdout]     |
[INFO] [stdout] 535 |     fn next(&mut self) -> Option<(&'a V)> {
[INFO] [stdout]     |                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 535 -     fn next(&mut self) -> Option<(&'a V)> {
[INFO] [stdout] 535 +     fn next(&mut self) -> Option<&'a V> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:581:34
[INFO] [stdout]     |
[INFO] [stdout] 581 |     fn next(&mut self) -> Option<(&'a mut V)> {
[INFO] [stdout]     |                                  ^         ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 581 -     fn next(&mut self) -> Option<(&'a mut V)> {
[INFO] [stdout] 581 +     fn next(&mut self) -> Option<&'a mut V> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "6b2bf9fef1fb32e22159594127da323c11b085fe723cea520bd9e1f21833698c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b2bf9fef1fb32e22159594127da323c11b085fe723cea520bd9e1f21833698c", kill_on_drop: false }`
[INFO] [stdout] 6b2bf9fef1fb32e22159594127da323c11b085fe723cea520bd9e1f21833698c