Dec 19 09:31:52.278 INFO checking saarw/cstruct2rs against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 09:31:52.278 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 09:31:52.697 INFO [stdout] a3b2012bdee12a0908a20f840bee55635b14d72843b15bbd4c41a34698114fb8
Dec 19 09:31:52.699 INFO running `"docker" "start" "-a" "a3b2012bdee12a0908a20f840bee55635b14d72843b15bbd4c41a34698114fb8"`
Dec 19 09:31:54.449 INFO [stderr]     Checking cstruct2rs v0.0.1 (/opt/crater/workdir)
Dec 19 09:31:54.825 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:31:54.825 INFO [stderr]   --> src/cinfo.rs:90:6
Dec 19 09:31:54.825 INFO [stderr]    |
Dec 19 09:31:54.825 INFO [stderr] 90 |     let mut name_buf: Cow<String>;
Dec 19 09:31:54.825 INFO [stderr]    |         ----^^^^^^^^
Dec 19 09:31:54.825 INFO [stderr]    |         |
Dec 19 09:31:54.825 INFO [stderr]    |         help: remove this `mut`
Dec 19 09:31:54.825 INFO [stderr]    |
Dec 19 09:31:54.825 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 09:31:54.825 INFO [stderr] 
Dec 19 09:31:54.825 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:31:54.825 INFO [stderr]   --> src/cinfo.rs:91:6
Dec 19 09:31:54.825 INFO [stderr]    |
Dec 19 09:31:54.825 INFO [stderr] 91 |     let mut var_name: Cow<str>;    
Dec 19 09:31:54.825 INFO [stderr]    |         ----^^^^^^^^
Dec 19 09:31:54.825 INFO [stderr]    |         |
Dec 19 09:31:54.825 INFO [stderr]    |         help: remove this `mut`
Dec 19 09:31:54.825 INFO [stderr] 
Dec 19 09:31:54.880 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:31:54.881 INFO [stderr]   --> src/cinfo.rs:90:6
Dec 19 09:31:54.881 INFO [stderr]    |
Dec 19 09:31:54.881 INFO [stderr] 90 |     let mut name_buf: Cow<String>;
Dec 19 09:31:54.881 INFO [stderr]    |         ----^^^^^^^^
Dec 19 09:31:54.882 INFO [stderr]    |         |
Dec 19 09:31:54.882 INFO [stderr]    |         help: remove this `mut`
Dec 19 09:31:54.882 INFO [stderr]    |
Dec 19 09:31:54.882 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 09:31:54.882 INFO [stderr] 
Dec 19 09:31:54.883 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:31:54.883 INFO [stderr]   --> src/cinfo.rs:91:6
Dec 19 09:31:54.883 INFO [stderr]    |
Dec 19 09:31:54.884 INFO [stderr] 91 |     let mut var_name: Cow<str>;    
Dec 19 09:31:54.884 INFO [stderr]    |         ----^^^^^^^^
Dec 19 09:31:54.884 INFO [stderr]    |         |
Dec 19 09:31:54.884 INFO [stderr]    |         help: remove this `mut`
Dec 19 09:31:54.884 INFO [stderr] 
Dec 19 09:31:54.941 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
Dec 19 09:31:55.559 INFO running `"docker" "inspect" "a3b2012bdee12a0908a20f840bee55635b14d72843b15bbd4c41a34698114fb8"`
Dec 19 09:31:55.874 INFO running `"docker" "rm" "-f" "a3b2012bdee12a0908a20f840bee55635b14d72843b15bbd4c41a34698114fb8"`
Dec 19 09:31:56.127 INFO [stdout] a3b2012bdee12a0908a20f840bee55635b14d72843b15bbd4c41a34698114fb8