Dec 12 01:54:55.236 INFO checking KuabeM/working-time-calculator against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 12 01:54:55.236 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-0/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 12 01:54:55.632 INFO [stdout] ca9fff444a23170b70d4f6b5088f99fab8c1fa9fe83625b4d16a6128e80b99d6
Dec 12 01:54:55.640 INFO running `"docker" "start" "-a" "ca9fff444a23170b70d4f6b5088f99fab8c1fa9fe83625b4d16a6128e80b99d6"`
Dec 12 01:54:57.224 INFO [stderr] usermod: no changes
Dec 12 01:54:57.332 INFO [stderr]     Checking working-time-calc v0.1.0 (/source)
Dec 12 01:54:58.348 INFO [stderr] warning: value assigned to `content` is never read
Dec 12 01:54:58.348 INFO [stderr]    --> src/main.rs:117:13
Dec 12 01:54:58.348 INFO [stderr]     |
Dec 12 01:54:58.348 INFO [stderr] 117 |     let mut content = String::new();
Dec 12 01:54:58.348 INFO [stderr]     |             ^^^^^^^
Dec 12 01:54:58.348 INFO [stderr]     |
Dec 12 01:54:58.348 INFO [stderr]     = note: #[warn(unused_assignments)] on by default
Dec 12 01:54:58.348 INFO [stderr] 
Dec 12 01:54:58.384 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:54:58.384 INFO [stderr]    --> src/main.rs:108:9
Dec 12 01:54:58.384 INFO [stderr]     |
Dec 12 01:54:58.384 INFO [stderr] 108 |     let mut content_opt = match read_file_to_string( &file_name) {
Dec 12 01:54:58.384 INFO [stderr]     |         ----^^^^^^^^^^^
Dec 12 01:54:58.384 INFO [stderr]     |         |
Dec 12 01:54:58.384 INFO [stderr]     |         help: remove this `mut`
Dec 12 01:54:58.384 INFO [stderr]     |
Dec 12 01:54:58.384 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 01:54:58.384 INFO [stderr] 
Dec 12 01:54:58.548 INFO [stderr] warning: value assigned to `content` is never read
Dec 12 01:54:58.548 INFO [stderr]    --> src/main.rs:117:13
Dec 12 01:54:58.548 INFO [stderr]     |
Dec 12 01:54:58.548 INFO [stderr] 117 |     let mut content = String::new();
Dec 12 01:54:58.548 INFO [stderr]     |             ^^^^^^^
Dec 12 01:54:58.548 INFO [stderr]     |
Dec 12 01:54:58.548 INFO [stderr]     = note: #[warn(unused_assignments)] on by default
Dec 12 01:54:58.548 INFO [stderr] 
Dec 12 01:54:58.569 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:54:58.569 INFO [stderr]    --> src/main.rs:108:9
Dec 12 01:54:58.569 INFO [stderr]     |
Dec 12 01:54:58.569 INFO [stderr] 108 |     let mut content_opt = match read_file_to_string( &file_name) {
Dec 12 01:54:58.569 INFO [stderr]     |         ----^^^^^^^^^^^
Dec 12 01:54:58.569 INFO [stderr]     |         |
Dec 12 01:54:58.569 INFO [stderr]     |         help: remove this `mut`
Dec 12 01:54:58.570 INFO [stderr]     |
Dec 12 01:54:58.570 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 01:54:58.570 INFO [stderr] 
Dec 12 01:54:58.624 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.38s
Dec 12 01:54:58.640 INFO [stderr] su: No module specific data is present
Dec 12 01:54:59.776 INFO running `"docker" "inspect" "ca9fff444a23170b70d4f6b5088f99fab8c1fa9fe83625b4d16a6128e80b99d6"`
Dec 12 01:55:00.007 INFO running `"docker" "rm" "-f" "ca9fff444a23170b70d4f6b5088f99fab8c1fa9fe83625b4d16a6128e80b99d6"`
Dec 12 01:55:00.298 INFO [stdout] ca9fff444a23170b70d4f6b5088f99fab8c1fa9fe83625b4d16a6128e80b99d6