Dec 14 11:10:16.953 INFO testing D4nte/rustfmt-3209 against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 14 11:10:16.953 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-3/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-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 14 11:10:17.396 INFO [stdout] 6fb3f68c68a057164001ee7e9eba215a994c90e77a96a1dde95acc9bdcdf49ca
Dec 14 11:10:17.398 INFO running `"docker" "start" "-a" "6fb3f68c68a057164001ee7e9eba215a994c90e77a96a1dde95acc9bdcdf49ca"`
Dec 14 11:10:18.569 INFO [stderr] usermod: no changes
Dec 14 11:10:18.604 INFO [stderr]    Compiling tmp v0.1.0 (/source)
Dec 14 11:10:19.031 INFO [stderr] error[E0412]: cannot find type `Mutex` in this scope
Dec 14 11:10:19.031 INFO [stderr]  --> src/main.rs:7:26
Dec 14 11:10:19.031 INFO [stderr]   |
Dec 14 11:10:19.031 INFO [stderr] 7 |     next_internal_index: Mutex<u32>,
Dec 14 11:10:19.031 INFO [stderr]   |                          ^^^^^ not found in this scope
Dec 14 11:10:19.031 INFO [stderr] help: possible candidate is found in another module, you can import it into scope
Dec 14 11:10:19.031 INFO [stderr]   |
Dec 14 11:10:19.031 INFO [stderr] 2 | use std::sync::Mutex;
Dec 14 11:10:19.031 INFO [stderr]   |
Dec 14 11:10:19.031 INFO [stderr] 
Dec 14 11:10:19.041 INFO [stderr] error: aborting due to previous error
Dec 14 11:10:19.041 INFO [stderr] 
Dec 14 11:10:19.041 INFO [stderr] For more information about this error, try `rustc --explain E0412`.
Dec 14 11:10:19.048 INFO [stderr] error: Could not compile `tmp`.
Dec 14 11:10:19.048 INFO [stderr] 
Dec 14 11:10:19.048 INFO [stderr] To learn more, run the command again with --verbose.
Dec 14 11:10:19.049 INFO [stderr] su: No module specific data is present
Dec 14 11:10:19.535 INFO running `"docker" "inspect" "6fb3f68c68a057164001ee7e9eba215a994c90e77a96a1dde95acc9bdcdf49ca"`
Dec 14 11:10:19.653 INFO running `"docker" "rm" "-f" "6fb3f68c68a057164001ee7e9eba215a994c90e77a96a1dde95acc9bdcdf49ca"`
Dec 14 11:10:19.870 INFO [stdout] 6fb3f68c68a057164001ee7e9eba215a994c90e77a96a1dde95acc9bdcdf49ca