Dec 17 16:15:21.209 INFO checking saarw/cstruct2rs against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 16:15:21.209 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-2/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/saarw/cstruct2rs:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 16:15:21.656 INFO [stdout] cd89141f9b02172322e88ec3a4d887316ab26dfd0f28d400cd7cda2d3802334e
Dec 17 16:15:21.658 INFO running `"docker" "start" "-a" "cd89141f9b02172322e88ec3a4d887316ab26dfd0f28d400cd7cda2d3802334e"`
Dec 17 16:15:23.181 INFO [stderr]     Checking cstruct2rs v0.0.1 (/opt/crater/workdir)
Dec 17 16:15:23.536 INFO [stderr] warning: variable does not need to be mutable
Dec 17 16:15:23.536 INFO [stderr]   --> src/cinfo.rs:90:6
Dec 17 16:15:23.537 INFO [stderr]    |
Dec 17 16:15:23.537 INFO [stderr] 90 |     let mut name_buf: Cow<String>;
Dec 17 16:15:23.537 INFO [stderr]    |         ----^^^^^^^^
Dec 17 16:15:23.537 INFO [stderr]    |         |
Dec 17 16:15:23.537 INFO [stderr]    |         help: remove this `mut`
Dec 17 16:15:23.537 INFO [stderr]    |
Dec 17 16:15:23.537 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 16:15:23.537 INFO [stderr] 
Dec 17 16:15:23.537 INFO [stderr] warning: variable does not need to be mutable
Dec 17 16:15:23.537 INFO [stderr]   --> src/cinfo.rs:91:6
Dec 17 16:15:23.537 INFO [stderr]    |
Dec 17 16:15:23.537 INFO [stderr] 91 |     let mut var_name: Cow<str>;    
Dec 17 16:15:23.537 INFO [stderr]    |         ----^^^^^^^^
Dec 17 16:15:23.537 INFO [stderr]    |         |
Dec 17 16:15:23.537 INFO [stderr]    |         help: remove this `mut`
Dec 17 16:15:23.537 INFO [stderr] 
Dec 17 16:15:23.618 INFO [stderr] warning: variable does not need to be mutable
Dec 17 16:15:23.618 INFO [stderr]   --> src/cinfo.rs:90:6
Dec 17 16:15:23.618 INFO [stderr]    |
Dec 17 16:15:23.618 INFO [stderr] 90 |     let mut name_buf: Cow<String>;
Dec 17 16:15:23.618 INFO [stderr]    |         ----^^^^^^^^
Dec 17 16:15:23.618 INFO [stderr]    |         |
Dec 17 16:15:23.618 INFO [stderr]    |         help: remove this `mut`
Dec 17 16:15:23.618 INFO [stderr]    |
Dec 17 16:15:23.618 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 16:15:23.619 INFO [stderr] 
Dec 17 16:15:23.619 INFO [stderr] warning: variable does not need to be mutable
Dec 17 16:15:23.619 INFO [stderr]   --> src/cinfo.rs:91:6
Dec 17 16:15:23.619 INFO [stderr]    |
Dec 17 16:15:23.619 INFO [stderr] 91 |     let mut var_name: Cow<str>;    
Dec 17 16:15:23.619 INFO [stderr]    |         ----^^^^^^^^
Dec 17 16:15:23.619 INFO [stderr]    |         |
Dec 17 16:15:23.619 INFO [stderr]    |         help: remove this `mut`
Dec 17 16:15:23.619 INFO [stderr] 
Dec 17 16:15:23.675 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
Dec 17 16:15:24.249 INFO running `"docker" "inspect" "cd89141f9b02172322e88ec3a4d887316ab26dfd0f28d400cd7cda2d3802334e"`
Dec 17 16:15:24.534 INFO running `"docker" "rm" "-f" "cd89141f9b02172322e88ec3a4d887316ab26dfd0f28d400cd7cda2d3802334e"`
Dec 17 16:15:24.892 INFO [stdout] cd89141f9b02172322e88ec3a4d887316ab26dfd0f28d400cd7cda2d3802334e