Nov 28 14:24:49.554 INFO checking Bkindmonk/RustPractice against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 28 14:24:49.556 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-7/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56074/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/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 +db42d4dad33013eba11ef37342ad9f614e5652b8-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"`
Nov 28 14:24:50.050 INFO [stdout] eace0c471699ef8a9f5b750b66a2eae4831a346d135fe6d613f0c7053a25d3e8
Nov 28 14:24:50.053 INFO running `"docker" "start" "-a" "eace0c471699ef8a9f5b750b66a2eae4831a346d135fe6d613f0c7053a25d3e8"`
Nov 28 14:24:52.192 INFO [stderr] usermod: no changes
Nov 28 14:24:52.232 INFO [stderr]     Checking mergesort v0.1.0 (/source)
Nov 28 14:24:53.151 INFO [stderr] warning: variable does not need to be mutable
Nov 28 14:24:53.151 INFO [stderr]   --> src/main.rs:91:13
Nov 28 14:24:53.151 INFO [stderr]    |
Nov 28 14:24:53.151 INFO [stderr] 91 |         let mut realhalves = (*real).split_at_mut(halflength);
Nov 28 14:24:53.151 INFO [stderr]    |             ----^^^^^^^^^^
Nov 28 14:24:53.151 INFO [stderr]    |             |
Nov 28 14:24:53.151 INFO [stderr]    |             help: remove this `mut`
Nov 28 14:24:53.151 INFO [stderr]    |
Nov 28 14:24:53.153 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 28 14:24:53.153 INFO [stderr] 
Nov 28 14:24:53.153 INFO [stderr] warning: variable does not need to be mutable
Nov 28 14:24:53.153 INFO [stderr]   --> src/main.rs:92:13
Nov 28 14:24:53.153 INFO [stderr]    |
Nov 28 14:24:53.153 INFO [stderr] 92 |         let mut scratchhalves = (*scratch).split_at_mut(halflength);
Nov 28 14:24:53.153 INFO [stderr]    |             ----^^^^^^^^^^^^^
Nov 28 14:24:53.153 INFO [stderr]    |             |
Nov 28 14:24:53.153 INFO [stderr]    |             help: remove this `mut`
Nov 28 14:24:53.154 INFO [stderr] 
Nov 28 14:24:53.372 INFO [stderr] warning: variable does not need to be mutable
Nov 28 14:24:53.372 INFO [stderr]   --> src/main.rs:91:13
Nov 28 14:24:53.372 INFO [stderr]    |
Nov 28 14:24:53.372 INFO [stderr] 91 |         let mut realhalves = (*real).split_at_mut(halflength);
Nov 28 14:24:53.372 INFO [stderr]    |             ----^^^^^^^^^^
Nov 28 14:24:53.372 INFO [stderr]    |             |
Nov 28 14:24:53.372 INFO [stderr]    |             help: remove this `mut`
Nov 28 14:24:53.372 INFO [stderr]    |
Nov 28 14:24:53.372 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 28 14:24:53.372 INFO [stderr] 
Nov 28 14:24:53.372 INFO [stderr] warning: variable does not need to be mutable
Nov 28 14:24:53.372 INFO [stderr]   --> src/main.rs:92:13
Nov 28 14:24:53.372 INFO [stderr]    |
Nov 28 14:24:53.372 INFO [stderr] 92 |         let mut scratchhalves = (*scratch).split_at_mut(halflength);
Nov 28 14:24:53.372 INFO [stderr]    |             ----^^^^^^^^^^^^^
Nov 28 14:24:53.372 INFO [stderr]    |             |
Nov 28 14:24:53.372 INFO [stderr]    |             help: remove this `mut`
Nov 28 14:24:53.372 INFO [stderr] 
Nov 28 14:24:53.401 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.19s
Nov 28 14:24:53.402 INFO [stderr] su: No module specific data is present
Nov 28 14:24:54.118 INFO running `"docker" "inspect" "eace0c471699ef8a9f5b750b66a2eae4831a346d135fe6d613f0c7053a25d3e8"`
Nov 28 14:24:54.338 INFO running `"docker" "rm" "-f" "eace0c471699ef8a9f5b750b66a2eae4831a346d135fe6d613f0c7053a25d3e8"`
Nov 28 14:24:54.619 INFO [stdout] eace0c471699ef8a9f5b750b66a2eae4831a346d135fe6d613f0c7053a25d3e8