Dec 05 01:37:07.656 INFO checking KuabeM/working-time-calculator against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 05 01:37:07.657 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-3/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 05 01:37:08.070 INFO [stdout] 36d72e6d3278d69f3888848002e4c748f472389b0756d2b7aef8b991a1089c78
Dec 05 01:37:08.075 INFO running `"docker" "start" "-a" "36d72e6d3278d69f3888848002e4c748f472389b0756d2b7aef8b991a1089c78"`
Dec 05 01:37:09.410 INFO [stderr] usermod: no changes
Dec 05 01:37:09.523 INFO [stderr]     Checking working-time-calc v0.1.0 (/source)
Dec 05 01:37:10.537 INFO [stderr] warning: value assigned to `content` is never read
Dec 05 01:37:10.537 INFO [stderr]    --> src/main.rs:117:13
Dec 05 01:37:10.537 INFO [stderr]     |
Dec 05 01:37:10.537 INFO [stderr] 117 |     let mut content = String::new();
Dec 05 01:37:10.537 INFO [stderr]     |             ^^^^^^^
Dec 05 01:37:10.537 INFO [stderr]     |
Dec 05 01:37:10.537 INFO [stderr]     = note: #[warn(unused_assignments)] on by default
Dec 05 01:37:10.537 INFO [stderr] 
Dec 05 01:37:10.591 INFO [stderr] warning: variable does not need to be mutable
Dec 05 01:37:10.591 INFO [stderr]    --> src/main.rs:108:9
Dec 05 01:37:10.591 INFO [stderr]     |
Dec 05 01:37:10.591 INFO [stderr] 108 |     let mut content_opt = match read_file_to_string( &file_name) {
Dec 05 01:37:10.591 INFO [stderr]     |         ----^^^^^^^^^^^
Dec 05 01:37:10.591 INFO [stderr]     |         |
Dec 05 01:37:10.591 INFO [stderr]     |         help: remove this `mut`
Dec 05 01:37:10.611 INFO [stderr]     |
Dec 05 01:37:10.611 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 05 01:37:10.611 INFO [stderr] 
Dec 05 01:37:10.879 INFO [stderr] warning: value assigned to `content` is never read
Dec 05 01:37:10.879 INFO [stderr]    --> src/main.rs:117:13
Dec 05 01:37:10.879 INFO [stderr]     |
Dec 05 01:37:10.879 INFO [stderr] 117 |     let mut content = String::new();
Dec 05 01:37:10.879 INFO [stderr]     |             ^^^^^^^
Dec 05 01:37:10.879 INFO [stderr]     |
Dec 05 01:37:10.879 INFO [stderr]     = note: #[warn(unused_assignments)] on by default
Dec 05 01:37:10.879 INFO [stderr] 
Dec 05 01:37:10.907 INFO [stderr] warning: variable does not need to be mutable
Dec 05 01:37:10.907 INFO [stderr]    --> src/main.rs:108:9
Dec 05 01:37:10.907 INFO [stderr]     |
Dec 05 01:37:10.907 INFO [stderr] 108 |     let mut content_opt = match read_file_to_string( &file_name) {
Dec 05 01:37:10.907 INFO [stderr]     |         ----^^^^^^^^^^^
Dec 05 01:37:10.907 INFO [stderr]     |         |
Dec 05 01:37:10.907 INFO [stderr]     |         help: remove this `mut`
Dec 05 01:37:10.907 INFO [stderr]     |
Dec 05 01:37:10.907 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 05 01:37:10.907 INFO [stderr] 
Dec 05 01:37:10.955 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.51s
Dec 05 01:37:10.963 INFO [stderr] su: No module specific data is present
Dec 05 01:37:11.873 INFO running `"docker" "inspect" "36d72e6d3278d69f3888848002e4c748f472389b0756d2b7aef8b991a1089c78"`
Dec 05 01:37:12.315 INFO running `"docker" "rm" "-f" "36d72e6d3278d69f3888848002e4c748f472389b0756d2b7aef8b991a1089c78"`
Dec 05 01:37:12.571 INFO [stdout] 36d72e6d3278d69f3888848002e4c748f472389b0756d2b7aef8b991a1089c78