[INFO] cloning repository https://github.com/srufle/maze-book-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/srufle/maze-book-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsrufle%2Fmaze-book-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsrufle%2Fmaze-book-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fb33121d25b45c94c8cebd62ad8f379f0cf1de61
[INFO] documenting srufle/maze-book-rs against try#66dfc4e010913fbed0c4ea91fc2c010004b0f441 for pr-73566
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsrufle%2Fmaze-book-rs" "/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/srufle/maze-book-rs 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/srufle/maze-book-rs
[INFO] finished tweaking git repo https://github.com/srufle/maze-book-rs
[INFO] tweaked toml for git repo https://github.com/srufle/maze-book-rs written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/srufle/maze-book-rs 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]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-9/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded radix_fmt v0.1.1
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 64b63ef3b72bc63306ff18632417a82fd6f8ec86fb0b7b574416882d7fe16c0f
[INFO] running `Command { std: "docker" "start" "-a" "64b63ef3b72bc63306ff18632417a82fd6f8ec86fb0b7b574416882d7fe16c0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64b63ef3b72bc63306ff18632417a82fd6f8ec86fb0b7b574416882d7fe16c0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64b63ef3b72bc63306ff18632417a82fd6f8ec86fb0b7b574416882d7fe16c0f", kill_on_drop: false }`
[INFO] [stdout] 64b63ef3b72bc63306ff18632417a82fd6f8ec86fb0b7b574416882d7fe16c0f
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3cce785e3aec8df694f1ab06fe37f8926bea723d764d3a873cfccf0581be33f0
[INFO] running `Command { std: "docker" "start" "-a" "3cce785e3aec8df694f1ab06fe37f8926bea723d764d3a873cfccf0581be33f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking lazy_static v1.4.0
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[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
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[INFO] [stderr]     Checking rusttype v0.8.3
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[INFO] [stderr]     Checking png v0.14.1
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[INFO] [stderr]     Checking slog-term v2.6.0
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[INFO] [stderr]  Documenting maze-book-rs v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/maze/cell.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |         (self.row as i32)
[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 block return value
[INFO] [stdout]   --> src/maze/cell.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         (self.col as i32)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/maze/cell.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         (margin + (self.col_i32() * cell_size) + lw_i32)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/maze/cell.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |         (margin - (self.row_i32() * cell_size) - cell_size + lw_i32)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/maze/grid.rs:617:9
[INFO] [stdout]     |
[INFO] [stdout] 617 |         (self.length == row + 1)
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/maze/grid.rs:621:9
[INFO] [stdout]     |
[INFO] [stdout] 621 |         (1 == row + 1)
[INFO] [stdout]     |         ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/maze/grid.rs:625:9
[INFO] [stdout]     |
[INFO] [stdout] 625 |         (self.width == col + 1)
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/maze/grid.rs:629:9
[INFO] [stdout]     |
[INFO] [stdout] 629 |         (1 == col + 1)
[INFO] [stdout]     |         ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 52.42s
[INFO] running `Command { std: "docker" "inspect" "3cce785e3aec8df694f1ab06fe37f8926bea723d764d3a873cfccf0581be33f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cce785e3aec8df694f1ab06fe37f8926bea723d764d3a873cfccf0581be33f0", kill_on_drop: false }`
[INFO] [stdout] 3cce785e3aec8df694f1ab06fe37f8926bea723d764d3a873cfccf0581be33f0