Dec 19 09:31:51.413 INFO checking saarw/cstruct2rs against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 09:31:51.413 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 09:31:51.754 INFO [stdout] 31b2eb9a6bb1158d9a4c9a1ed2242254348dcc32e738e8e2378118728443a470
Dec 19 09:31:51.758 INFO running `"docker" "start" "-a" "31b2eb9a6bb1158d9a4c9a1ed2242254348dcc32e738e8e2378118728443a470"`
Dec 19 09:31:53.434 INFO [stderr]     Checking cstruct2rs v0.0.1 (/opt/crater/workdir)
Dec 19 09:31:53.756 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:31:53.756 INFO [stderr]   --> src/cinfo.rs:90:6
Dec 19 09:31:53.756 INFO [stderr]    |
Dec 19 09:31:53.756 INFO [stderr] 90 |     let mut name_buf: Cow<String>;
Dec 19 09:31:53.756 INFO [stderr]    |         ----^^^^^^^^
Dec 19 09:31:53.756 INFO [stderr]    |         |
Dec 19 09:31:53.756 INFO [stderr]    |         help: remove this `mut`
Dec 19 09:31:53.756 INFO [stderr]    |
Dec 19 09:31:53.756 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 09:31:53.756 INFO [stderr] 
Dec 19 09:31:53.756 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:31:53.756 INFO [stderr]   --> src/cinfo.rs:91:6
Dec 19 09:31:53.756 INFO [stderr]    |
Dec 19 09:31:53.756 INFO [stderr] 91 |     let mut var_name: Cow<str>;    
Dec 19 09:31:53.756 INFO [stderr]    |         ----^^^^^^^^
Dec 19 09:31:53.756 INFO [stderr]    |         |
Dec 19 09:31:53.756 INFO [stderr]    |         help: remove this `mut`
Dec 19 09:31:53.756 INFO [stderr] 
Dec 19 09:31:53.840 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:31:53.840 INFO [stderr]   --> src/cinfo.rs:90:6
Dec 19 09:31:53.840 INFO [stderr]    |
Dec 19 09:31:53.840 INFO [stderr] 90 |     let mut name_buf: Cow<String>;
Dec 19 09:31:53.840 INFO [stderr]    |         ----^^^^^^^^
Dec 19 09:31:53.840 INFO [stderr]    |         |
Dec 19 09:31:53.840 INFO [stderr]    |         help: remove this `mut`
Dec 19 09:31:53.840 INFO [stderr]    |
Dec 19 09:31:53.840 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 09:31:53.840 INFO [stderr] 
Dec 19 09:31:53.840 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:31:53.840 INFO [stderr]   --> src/cinfo.rs:91:6
Dec 19 09:31:53.840 INFO [stderr]    |
Dec 19 09:31:53.840 INFO [stderr] 91 |     let mut var_name: Cow<str>;    
Dec 19 09:31:53.840 INFO [stderr]    |         ----^^^^^^^^
Dec 19 09:31:53.840 INFO [stderr]    |         |
Dec 19 09:31:53.840 INFO [stderr]    |         help: remove this `mut`
Dec 19 09:31:53.840 INFO [stderr] 
Dec 19 09:31:53.898 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.47s
Dec 19 09:31:54.632 INFO running `"docker" "inspect" "31b2eb9a6bb1158d9a4c9a1ed2242254348dcc32e738e8e2378118728443a470"`
Dec 19 09:31:54.940 INFO running `"docker" "rm" "-f" "31b2eb9a6bb1158d9a4c9a1ed2242254348dcc32e738e8e2378118728443a470"`
Dec 19 09:31:55.192 INFO [stdout] 31b2eb9a6bb1158d9a4c9a1ed2242254348dcc32e738e8e2378118728443a470