[INFO] cloning repository https://github.com/alevy/iterator_bench
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alevy/iterator_bench" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falevy%2Fiterator_bench", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falevy%2Fiterator_bench'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 026d67b174f1304e34626850dcc9c3aecc155f2b
[INFO] checking alevy/iterator_bench against master#0599f3403366d9c57f0625e6de3af214b5042a90 for pr-87710
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falevy%2Fiterator_bench" "/workspace/builds/worker-42/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-42/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alevy/iterator_bench on toolchain 0599f3403366d9c57f0625e6de3af214b5042a90
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-42/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/alevy/iterator_bench
[INFO] finished tweaking git repo https://github.com/alevy/iterator_bench
[INFO] tweaked toml for git repo https://github.com/alevy/iterator_bench written to /workspace/builds/worker-42/source/Cargo.toml
[INFO] crate git repo https://github.com/alevy/iterator_bench already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 680cbd3572f0903a86c80bcd4afa009f6aa124b8fe532c81f8a4e92244d9826a
[INFO] running `Command { std: "docker" "start" "-a" "680cbd3572f0903a86c80bcd4afa009f6aa124b8fe532c81f8a4e92244d9826a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "680cbd3572f0903a86c80bcd4afa009f6aa124b8fe532c81f8a4e92244d9826a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "680cbd3572f0903a86c80bcd4afa009f6aa124b8fe532c81f8a4e92244d9826a", kill_on_drop: false }`
[INFO] [stdout] 680cbd3572f0903a86c80bcd4afa009f6aa124b8fe532c81f8a4e92244d9826a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f7bee452d19f36f0b13c6a8e3a81f1538b88f334160ab8451f3b6a56458ca37
[INFO] running `Command { std: "docker" "start" "-a" "5f7bee452d19f36f0b13c6a8e3a81f1538b88f334160ab8451f3b6a56458ca37", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking iterator_bench v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/main.rs:63:1
[INFO] [stdout]    |
[INFO] [stdout] 63 | / /// This is the implementation we would write in C.
[INFO] [stdout] 64 | | ///
[INFO] [stdout] 65 | | ///   * It iterators over the input array with a C-style for-loop.
[INFO] [stdout] 66 | | ///
[INFO] [stdout] ...  |
[INFO] [stdout] 77 | | /// The compiler has managed to compile this into packed moves. So there are only 20,000 iterations
[INFO] [stdout] 78 | | /// of the loop with 5 instructions each.
[INFO] [stdout]    | |_----------------------------------------^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/main.rs:63:1
[INFO] [stdout]    |
[INFO] [stdout] 63 | / /// This is the implementation we would write in C.
[INFO] [stdout] 64 | | ///
[INFO] [stdout] 65 | | ///   * It iterators over the input array with a C-style for-loop.
[INFO] [stdout] 66 | | ///
[INFO] [stdout] ...  |
[INFO] [stdout] 77 | | /// The compiler has managed to compile this into packed moves. So there are only 20,000 iterations
[INFO] [stdout] 78 | | /// of the loop with 5 instructions each.
[INFO] [stdout]    | |_----------------------------------------^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[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 4m 42s
[INFO] running `Command { std: "docker" "inspect" "5f7bee452d19f36f0b13c6a8e3a81f1538b88f334160ab8451f3b6a56458ca37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f7bee452d19f36f0b13c6a8e3a81f1538b88f334160ab8451f3b6a56458ca37", kill_on_drop: false }`
[INFO] [stdout] 5f7bee452d19f36f0b13c6a8e3a81f1538b88f334160ab8451f3b6a56458ca37