[INFO] crate sliding_puzzle 1.0.0 is already in cache
[INFO] documenting sliding_puzzle-1.0.0 against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] extracting crate sliding_puzzle 1.0.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate sliding_puzzle 1.0.0 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 crates.io crate sliding_puzzle 1.0.0
[INFO] finished tweaking crates.io crate sliding_puzzle 1.0.0
[INFO] tweaked toml for crates.io crate sliding_puzzle 1.0.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[bench]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other benchmark targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a benchmark target:
[INFO] [stderr] 
[INFO] [stderr] * /workspace/builds/worker-6/source/benches/from_decimal.rs
[INFO] [stderr] * /workspace/builds/worker-6/source/benches/new.rs
[INFO] [stderr] * /workspace/builds/worker-6/source/benches/from_decimal_unchecked.rs
[INFO] [stderr] * /workspace/builds/worker-6/source/benches/moves.rs
[INFO] [stderr] * /workspace/builds/worker-6/source/benches/to_decimal_unchecked.rs
[INFO] [stderr] * /workspace/builds/worker-6/source/benches/clone.rs
[INFO] [stderr] * /workspace/builds/worker-6/source/benches/slide_mut_unchecked.rs
[INFO] [stderr] * /workspace/builds/worker-6/source/benches/to_decimal.rs
[INFO] [stderr] * /workspace/builds/worker-6/source/benches/slide_mut.rs
[INFO] [stderr] * /workspace/builds/worker-6/source/benches/scramble.rs
[INFO] [stderr] * /workspace/builds/worker-6/source/benches/slide.rs
[INFO] [stderr] * /workspace/builds/worker-6/source/benches/slide_unchecked.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a benchmark target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autobenches = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 08a816b6ae2a2bd069a974273af38f16adb8d76d566ee80e5b48397030d823d3
[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" "08a816b6ae2a2bd069a974273af38f16adb8d76d566ee80e5b48397030d823d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08a816b6ae2a2bd069a974273af38f16adb8d76d566ee80e5b48397030d823d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08a816b6ae2a2bd069a974273af38f16adb8d76d566ee80e5b48397030d823d3", kill_on_drop: false }`
[INFO] [stdout] 08a816b6ae2a2bd069a974273af38f16adb8d76d566ee80e5b48397030d823d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 0e19298294fcdc387f39c165d99a5644e75ad39134c8076063bf581b5e791a84
[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" "0e19298294fcdc387f39c165d99a5644e75ad39134c8076063bf581b5e791a84", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[bench]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other benchmark targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a benchmark target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/rustwide/workdir/benches/from_decimal.rs
[INFO] [stderr] * /opt/rustwide/workdir/benches/new.rs
[INFO] [stderr] * /opt/rustwide/workdir/benches/from_decimal_unchecked.rs
[INFO] [stderr] * /opt/rustwide/workdir/benches/moves.rs
[INFO] [stderr] * /opt/rustwide/workdir/benches/to_decimal_unchecked.rs
[INFO] [stderr] * /opt/rustwide/workdir/benches/clone.rs
[INFO] [stderr] * /opt/rustwide/workdir/benches/slide_mut_unchecked.rs
[INFO] [stderr] * /opt/rustwide/workdir/benches/to_decimal.rs
[INFO] [stderr] * /opt/rustwide/workdir/benches/slide_mut.rs
[INFO] [stderr] * /opt/rustwide/workdir/benches/scramble.rs
[INFO] [stderr] * /opt/rustwide/workdir/benches/slide.rs
[INFO] [stderr] * /opt/rustwide/workdir/benches/slide_unchecked.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a benchmark target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autobenches = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]     Checking bit-vec v0.4.4
[INFO] [stderr]     Checking lehmer v2.0.0
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking bit-set v0.4.0
[INFO] [stderr]     Checking sliding_puzzle v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting sliding_puzzle v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/base/mod.rs:72:66
[INFO] [stdout]    |
[INFO] [stdout] 72 |     pub fn slide_mut(&mut self, direction: &Direction) -> Result<(&mut Self)> {
[INFO] [stdout]    |                                                                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/base/mod.rs:72:66
[INFO] [stdout]    |
[INFO] [stdout] 72 |     pub fn slide_mut(&mut self, direction: &Direction) -> Result<(&mut Self)> {
[INFO] [stdout]    |                                                                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.91s
[INFO] running `Command { std: "docker" "inspect" "0e19298294fcdc387f39c165d99a5644e75ad39134c8076063bf581b5e791a84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e19298294fcdc387f39c165d99a5644e75ad39134c8076063bf581b5e791a84", kill_on_drop: false }`
[INFO] [stdout] 0e19298294fcdc387f39c165d99a5644e75ad39134c8076063bf581b5e791a84