[INFO] updating cached repository matklad/rowan
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/matklad/rowan
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/matklad/rowan" "work/ex/pr-60174/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/matklad/rowan"`
[INFO] [stderr] Cloning into 'work/ex/pr-60174/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/matklad/rowan'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/matklad/rowan" "work/ex/pr-60174/sources/try#74092351c05ae61047b2be02024415546595e974/gh/matklad/rowan"`
[INFO] [stderr] Cloning into 'work/ex/pr-60174/sources/try#74092351c05ae61047b2be02024415546595e974/gh/matklad/rowan'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a1a7ced24de29e7672564513faa3909d072906bd
[INFO] sha for GitHub repo matklad/rowan: a1a7ced24de29e7672564513faa3909d072906bd
[INFO] validating manifest of matklad/rowan on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of matklad/rowan on toolchain try#74092351c05ae61047b2be02024415546595e974
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+74092351c05ae61047b2be02024415546595e974-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing matklad/rowan
[INFO] finished frobbing matklad/rowan
[INFO] frobbed toml for matklad/rowan written to work/ex/pr-60174/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/matklad/rowan/Cargo.toml
[INFO] started frobbing matklad/rowan
[INFO] finished frobbing matklad/rowan
[INFO] frobbed toml for matklad/rowan written to work/ex/pr-60174/sources/try#74092351c05ae61047b2be02024415546595e974/gh/matklad/rowan/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on the registry index
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+74092351c05ae61047b2be02024415546595e974-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+74092351c05ae61047b2be02024415546595e974-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking matklad/rowan against master#e305df1846a6d985315917ae0c81b74af8b4e641 for pr-60174
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60174/worker-3/master#e305df1846a6d985315917ae0c81b74af8b4e641:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60174/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/matklad/rowan:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a9825a46d21e7c59a573602944b566c641e400a0f8aee8a18cebaa9786ee4592
[INFO] running `"docker" "start" "-a" "a9825a46d21e7c59a573602944b566c641e400a0f8aee8a18cebaa9786ee4592"`
[INFO] [stderr]     Checking text_unit v0.1.6
[INFO] [stderr]     Checking smol_str v0.1.10
[INFO] [stderr]     Checking colosseum v0.2.2
[INFO] [stderr]     Checking m_lexer v0.0.4
[INFO] [stderr]     Checking rowan v0.3.3 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/imp.rs:222:17
[INFO] [stderr]     |
[INFO] [stderr] 222 |             let mut red_node = root.arena.alloc(SwapCell::new(0.into()));
[INFO] [stderr]     |                 ----^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/imp.rs:222:17
[INFO] [stderr]     |
[INFO] [stderr] 222 |             let mut red_node = root.arena.alloc(SwapCell::new(0.into()));
[INFO] [stderr]     |                 ----^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.71s
[INFO] running `"docker" "inspect" "a9825a46d21e7c59a573602944b566c641e400a0f8aee8a18cebaa9786ee4592"`
[INFO] running `"docker" "rm" "-f" "a9825a46d21e7c59a573602944b566c641e400a0f8aee8a18cebaa9786ee4592"`
[INFO] [stdout] a9825a46d21e7c59a573602944b566c641e400a0f8aee8a18cebaa9786ee4592