Dec 06 15:27:08.269 INFO testing Bkindmonk/RustPractice against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 06 15:27:08.269 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-3/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 06 15:27:08.650 INFO [stdout] 3df9a1afd713dace16faa7122dc053f8e52151e4d1f87ca68be4c5be6519b845
Dec 06 15:27:08.658 INFO running `"docker" "start" "-a" "3df9a1afd713dace16faa7122dc053f8e52151e4d1f87ca68be4c5be6519b845"`
Dec 06 15:27:09.796 INFO [stderr] usermod: no changes
Dec 06 15:27:09.856 INFO [stderr]    Compiling mergesort v0.1.0 (/source)
Dec 06 15:27:10.372 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:27:10.372 INFO [stderr]   --> src/main.rs:91:13
Dec 06 15:27:10.372 INFO [stderr]    |
Dec 06 15:27:10.372 INFO [stderr] 91 |         let mut realhalves = (*real).split_at_mut(halflength);
Dec 06 15:27:10.372 INFO [stderr]    |             ----^^^^^^^^^^
Dec 06 15:27:10.372 INFO [stderr]    |             |
Dec 06 15:27:10.372 INFO [stderr]    |             help: remove this `mut`
Dec 06 15:27:10.372 INFO [stderr]    |
Dec 06 15:27:10.372 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 15:27:10.372 INFO [stderr] 
Dec 06 15:27:10.372 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:27:10.372 INFO [stderr]   --> src/main.rs:92:13
Dec 06 15:27:10.372 INFO [stderr]    |
Dec 06 15:27:10.372 INFO [stderr] 92 |         let mut scratchhalves = (*scratch).split_at_mut(halflength);
Dec 06 15:27:10.372 INFO [stderr]    |             ----^^^^^^^^^^^^^
Dec 06 15:27:10.372 INFO [stderr]    |             |
Dec 06 15:27:10.372 INFO [stderr]    |             help: remove this `mut`
Dec 06 15:27:10.372 INFO [stderr] 
Dec 06 15:27:11.220 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.39s
Dec 06 15:27:11.220 INFO [stderr] su: No module specific data is present
Dec 06 15:27:11.843 INFO running `"docker" "inspect" "3df9a1afd713dace16faa7122dc053f8e52151e4d1f87ca68be4c5be6519b845"`
Dec 06 15:27:12.202 INFO running `"docker" "rm" "-f" "3df9a1afd713dace16faa7122dc053f8e52151e4d1f87ca68be4c5be6519b845"`
Dec 06 15:27:12.578 INFO [stdout] 3df9a1afd713dace16faa7122dc053f8e52151e4d1f87ca68be4c5be6519b845
Dec 06 15:27:12.580 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-3/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt test --frozen --no-run" "-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 06 15:27:12.960 INFO [stdout] 8303cc3c07a77cadd45585f814d23be68dbe750a7e05459c5196cd75bec1d0c7
Dec 06 15:27:12.962 INFO running `"docker" "start" "-a" "8303cc3c07a77cadd45585f814d23be68dbe750a7e05459c5196cd75bec1d0c7"`
Dec 06 15:27:14.344 INFO [stderr] usermod: no changes
Dec 06 15:27:14.412 INFO [stderr]    Compiling mergesort v0.1.0 (/source)
Dec 06 15:27:15.068 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:27:15.068 INFO [stderr]   --> src/main.rs:91:13
Dec 06 15:27:15.068 INFO [stderr]    |
Dec 06 15:27:15.068 INFO [stderr] 91 |         let mut realhalves = (*real).split_at_mut(halflength);
Dec 06 15:27:15.068 INFO [stderr]    |             ----^^^^^^^^^^
Dec 06 15:27:15.068 INFO [stderr]    |             |
Dec 06 15:27:15.068 INFO [stderr]    |             help: remove this `mut`
Dec 06 15:27:15.068 INFO [stderr]    |
Dec 06 15:27:15.068 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 15:27:15.068 INFO [stderr] 
Dec 06 15:27:15.068 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:27:15.068 INFO [stderr]   --> src/main.rs:92:13
Dec 06 15:27:15.068 INFO [stderr]    |
Dec 06 15:27:15.068 INFO [stderr] 92 |         let mut scratchhalves = (*scratch).split_at_mut(halflength);
Dec 06 15:27:15.068 INFO [stderr]    |             ----^^^^^^^^^^^^^
Dec 06 15:27:15.068 INFO [stderr]    |             |
Dec 06 15:27:15.068 INFO [stderr]    |             help: remove this `mut`
Dec 06 15:27:15.068 INFO [stderr] 
Dec 06 15:27:15.387 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
Dec 06 15:27:15.390 INFO [stderr] su: No module specific data is present
Dec 06 15:27:16.074 INFO running `"docker" "inspect" "8303cc3c07a77cadd45585f814d23be68dbe750a7e05459c5196cd75bec1d0c7"`
Dec 06 15:27:16.318 INFO running `"docker" "rm" "-f" "8303cc3c07a77cadd45585f814d23be68dbe750a7e05459c5196cd75bec1d0c7"`
Dec 06 15:27:16.586 INFO [stdout] 8303cc3c07a77cadd45585f814d23be68dbe750a7e05459c5196cd75bec1d0c7
Dec 06 15:27:16.588 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-3/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt test --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 06 15:27:16.968 INFO [stdout] 3f8d9db02d6ee513c84f263ea388cc352e9be7fa6dc0ccf742a7b7943ceeacd4
Dec 06 15:27:16.976 INFO running `"docker" "start" "-a" "3f8d9db02d6ee513c84f263ea388cc352e9be7fa6dc0ccf742a7b7943ceeacd4"`
Dec 06 15:27:18.324 INFO [stderr] usermod: no changes
Dec 06 15:27:18.377 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
Dec 06 15:27:18.377 INFO [stderr]      Running /target/debug/deps/mergesort-478ec5ef89f1de35
Dec 06 15:27:18.384 INFO [stdout] 
Dec 06 15:27:18.384 INFO [stdout] running 0 tests
Dec 06 15:27:18.384 INFO [stdout] 
Dec 06 15:27:18.384 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 15:27:18.384 INFO [stdout] 
Dec 06 15:27:18.388 INFO [stderr] su: No module specific data is present
Dec 06 15:27:19.122 INFO running `"docker" "inspect" "3f8d9db02d6ee513c84f263ea388cc352e9be7fa6dc0ccf742a7b7943ceeacd4"`
Dec 06 15:27:19.448 INFO running `"docker" "rm" "-f" "3f8d9db02d6ee513c84f263ea388cc352e9be7fa6dc0ccf742a7b7943ceeacd4"`
Dec 06 15:27:19.748 INFO [stdout] 3f8d9db02d6ee513c84f263ea388cc352e9be7fa6dc0ccf742a7b7943ceeacd4