[INFO] updating cached repository alevy/iterator_bench
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/alevy/iterator_bench
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/alevy/iterator_bench" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/alevy/iterator_bench"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/alevy/iterator_bench'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/alevy/iterator_bench" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/alevy/iterator_bench"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/alevy/iterator_bench'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 026d67b174f1304e34626850dcc9c3aecc155f2b
[INFO] sha for GitHub repo alevy/iterator_bench: 026d67b174f1304e34626850dcc9c3aecc155f2b
[INFO] validating manifest of alevy/iterator_bench on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of alevy/iterator_bench on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing alevy/iterator_bench
[INFO] finished frobbing alevy/iterator_bench
[INFO] frobbed toml for alevy/iterator_bench written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/alevy/iterator_bench/Cargo.toml
[INFO] started frobbing alevy/iterator_bench
[INFO] finished frobbing alevy/iterator_bench
[INFO] frobbed toml for alevy/iterator_bench written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/alevy/iterator_bench/Cargo.toml
[INFO] crate alevy/iterator_bench already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking alevy/iterator_bench against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-7/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/alevy/iterator_bench:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2f13bd5b83a15070c2cfcb89d5f95ea9f98274d0a493dfb956416f6f7f36edc1
[INFO] running `"docker" "start" "-a" "2f13bd5b83a15070c2cfcb89d5f95ea9f98274d0a493dfb956416f6f7f36edc1"`
[INFO] [stderr]     Checking iterator_bench v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/main.rs:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 | / /// This is the implementation we would write in C.
[INFO] [stderr] 64 | | ///
[INFO] [stderr] 65 | | ///   * It iterators over the input array with a C-style for-loop.
[INFO] [stderr] 66 | | ///
[INFO] [stderr] ...  |
[INFO] [stderr] 77 | | /// The compiler has managed to compile this into packed moves. So there are only 20,000 iterations
[INFO] [stderr] 78 | | /// of the loop with 5 instructions each.
[INFO] [stderr]    | |_________________________________________^
[INFO] [stderr] 79 | / benchmark!(
[INFO] [stderr] 80 | |     optimal_unsafe,
[INFO] [stderr] 81 | |     [u8; 640000],
[INFO] [stderr] 82 | |     [u16; 320000],
[INFO] [stderr] ...  |
[INFO] [stderr] 89 | |     }
[INFO] [stderr] 90 | | );
[INFO] [stderr]    | |__- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/main.rs:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 | / /// This is the implementation we would write in C.
[INFO] [stderr] 64 | | ///
[INFO] [stderr] 65 | | ///   * It iterators over the input array with a C-style for-loop.
[INFO] [stderr] 66 | | ///
[INFO] [stderr] ...  |
[INFO] [stderr] 77 | | /// The compiler has managed to compile this into packed moves. So there are only 20,000 iterations
[INFO] [stderr] 78 | | /// of the loop with 5 instructions each.
[INFO] [stderr]    | |_________________________________________^
[INFO] [stderr] 79 | / benchmark!(
[INFO] [stderr] 80 | |     optimal_unsafe,
[INFO] [stderr] 81 | |     [u8; 640000],
[INFO] [stderr] 82 | |     [u16; 320000],
[INFO] [stderr] ...  |
[INFO] [stderr] 89 | |     }
[INFO] [stderr] 90 | | );
[INFO] [stderr]    | |__- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `"docker" "inspect" "2f13bd5b83a15070c2cfcb89d5f95ea9f98274d0a493dfb956416f6f7f36edc1"`
[INFO] running `"docker" "rm" "-f" "2f13bd5b83a15070c2cfcb89d5f95ea9f98274d0a493dfb956416f6f7f36edc1"`
[INFO] [stdout] 2f13bd5b83a15070c2cfcb89d5f95ea9f98274d0a493dfb956416f6f7f36edc1