Dec 12 08:11:33.967 INFO checking rustils-0.1.0 against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 12 08:11:33.967 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 08:11:34.132 INFO [stdout] ec4eeac2dd1719d54610e658855d94c52b767282ee84eb9a12546e02f9e28ab5
Dec 12 08:11:34.138 INFO running `"docker" "start" "-a" "ec4eeac2dd1719d54610e658855d94c52b767282ee84eb9a12546e02f9e28ab5"`
Dec 12 08:11:34.573 INFO [stderr] usermod: no changes
Dec 12 08:11:34.642 INFO [stderr]     Checking rustils v0.1.0 (/source)
Dec 12 08:11:36.612 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 12 08:11:36.612 INFO [stderr]    --> src/string.rs:350:9
Dec 12 08:11:36.612 INFO [stderr]     |
Dec 12 08:11:36.612 INFO [stderr] 350 |         temp.drain(len-search.len()..len).collect::<String>();
Dec 12 08:11:36.612 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 08:11:36.612 INFO [stderr]     |
Dec 12 08:11:36.612 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 12 08:11:36.612 INFO [stderr]     = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 12 08:11:36.612 INFO [stderr] 
Dec 12 08:11:36.612 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 12 08:11:36.612 INFO [stderr]    --> src/string.rs:363:9
Dec 12 08:11:36.612 INFO [stderr]     |
Dec 12 08:11:36.612 INFO [stderr] 363 |         temp.drain(..search.len()).collect::<String>();
Dec 12 08:11:36.612 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 08:11:36.612 INFO [stderr]     |
Dec 12 08:11:36.612 INFO [stderr]     = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 12 08:11:36.612 INFO [stderr] 
Dec 12 08:11:37.279 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 12 08:11:37.279 INFO [stderr]    --> src/string.rs:350:9
Dec 12 08:11:37.279 INFO [stderr]     |
Dec 12 08:11:37.279 INFO [stderr] 350 |         temp.drain(len-search.len()..len).collect::<String>();
Dec 12 08:11:37.279 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 08:11:37.279 INFO [stderr]     |
Dec 12 08:11:37.279 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 12 08:11:37.279 INFO [stderr]     = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 12 08:11:37.279 INFO [stderr] 
Dec 12 08:11:37.279 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 12 08:11:37.279 INFO [stderr]    --> src/string.rs:363:9
Dec 12 08:11:37.279 INFO [stderr]     |
Dec 12 08:11:37.279 INFO [stderr] 363 |         temp.drain(..search.len()).collect::<String>();
Dec 12 08:11:37.279 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 08:11:37.279 INFO [stderr]     |
Dec 12 08:11:37.279 INFO [stderr]     = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 12 08:11:37.279 INFO [stderr] 
Dec 12 08:11:45.149 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.55s
Dec 12 08:11:45.156 INFO [stderr] su: No module specific data is present
Dec 12 08:11:45.811 INFO running `"docker" "inspect" "ec4eeac2dd1719d54610e658855d94c52b767282ee84eb9a12546e02f9e28ab5"`
Dec 12 08:11:46.062 INFO running `"docker" "rm" "-f" "ec4eeac2dd1719d54610e658855d94c52b767282ee84eb9a12546e02f9e28ab5"`
Dec 12 08:11:46.384 INFO [stdout] ec4eeac2dd1719d54610e658855d94c52b767282ee84eb9a12546e02f9e28ab5