Dec 05 01:37:04.633 INFO checking KuabeM/working-time-calculator against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 05 01:37:04.633 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-7/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/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 +1df97983eb2057dc6a8f7eb364e263b51ae23230-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 01:37:05.229 INFO [stdout] 27e195931680d5ceffe01698c6dd00ea23189aea1044424bfe59db9b19963117
Dec 05 01:37:05.232 INFO running `"docker" "start" "-a" "27e195931680d5ceffe01698c6dd00ea23189aea1044424bfe59db9b19963117"`
Dec 05 01:37:07.130 INFO [stderr] usermod: no changes
Dec 05 01:37:07.211 INFO [stderr]     Checking working-time-calc v0.1.0 (/source)
Dec 05 01:37:07.858 INFO [stderr] warning: value assigned to `content` is never read
Dec 05 01:37:07.858 INFO [stderr]    --> src/main.rs:117:13
Dec 05 01:37:07.858 INFO [stderr]     |
Dec 05 01:37:07.858 INFO [stderr] 117 |     let mut content = String::new();
Dec 05 01:37:07.858 INFO [stderr]     |             ^^^^^^^
Dec 05 01:37:07.858 INFO [stderr]     |
Dec 05 01:37:07.858 INFO [stderr]     = note: #[warn(unused_assignments)] on by default
Dec 05 01:37:07.858 INFO [stderr] 
Dec 05 01:37:07.880 INFO [stderr] warning: variable does not need to be mutable
Dec 05 01:37:07.880 INFO [stderr]    --> src/main.rs:108:9
Dec 05 01:37:07.880 INFO [stderr]     |
Dec 05 01:37:07.880 INFO [stderr] 108 |     let mut content_opt = match read_file_to_string( &file_name) {
Dec 05 01:37:07.880 INFO [stderr]     |         ----^^^^^^^^^^^
Dec 05 01:37:07.880 INFO [stderr]     |         |
Dec 05 01:37:07.880 INFO [stderr]     |         help: remove this `mut`
Dec 05 01:37:07.880 INFO [stderr]     |
Dec 05 01:37:07.880 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 05 01:37:07.880 INFO [stderr] 
Dec 05 01:37:08.322 INFO [stderr] warning: value assigned to `content` is never read
Dec 05 01:37:08.322 INFO [stderr]    --> src/main.rs:117:13
Dec 05 01:37:08.322 INFO [stderr]     |
Dec 05 01:37:08.322 INFO [stderr] 117 |     let mut content = String::new();
Dec 05 01:37:08.322 INFO [stderr]     |             ^^^^^^^
Dec 05 01:37:08.322 INFO [stderr]     |
Dec 05 01:37:08.322 INFO [stderr]     = note: #[warn(unused_assignments)] on by default
Dec 05 01:37:08.322 INFO [stderr] 
Dec 05 01:37:08.363 INFO [stderr] warning: variable does not need to be mutable
Dec 05 01:37:08.363 INFO [stderr]    --> src/main.rs:108:9
Dec 05 01:37:08.363 INFO [stderr]     |
Dec 05 01:37:08.363 INFO [stderr] 108 |     let mut content_opt = match read_file_to_string( &file_name) {
Dec 05 01:37:08.363 INFO [stderr]     |         ----^^^^^^^^^^^
Dec 05 01:37:08.363 INFO [stderr]     |         |
Dec 05 01:37:08.363 INFO [stderr]     |         help: remove this `mut`
Dec 05 01:37:08.363 INFO [stderr]     |
Dec 05 01:37:08.363 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 05 01:37:08.363 INFO [stderr] 
Dec 05 01:37:08.403 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.25s
Dec 05 01:37:08.406 INFO [stderr] su: No module specific data is present
Dec 05 01:37:09.231 INFO running `"docker" "inspect" "27e195931680d5ceffe01698c6dd00ea23189aea1044424bfe59db9b19963117"`
Dec 05 01:37:09.449 INFO running `"docker" "rm" "-f" "27e195931680d5ceffe01698c6dd00ea23189aea1044424bfe59db9b19963117"`
Dec 05 01:37:09.785 INFO [stdout] 27e195931680d5ceffe01698c6dd00ea23189aea1044424bfe59db9b19963117