Oct 21 21:57:08.939 INFO checking Bkindmonk/RustPractice against master#155510e377ae2a8d8ee0dad1a5f809c9062a5526 for pr-55192
Oct 21 21:57:08.939 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-55192/worker-6/master#155510e377ae2a8d8ee0dad1a5f809c9062a5526:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-6/pr-55192/master#155510e377ae2a8d8ee0dad1a5f809c9062a5526:/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 +155510e377ae2a8d8ee0dad1a5f809c9062a5526-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"`
Oct 21 21:57:09.387 INFO blam! 2e8438c26b7e980573563a6f031403979f1868fa5ee72efa4a4a3b6870e311d7
Oct 21 21:57:09.388 INFO running `"docker" "start" "-a" "2e8438c26b7e980573563a6f031403979f1868fa5ee72efa4a4a3b6870e311d7"`
Oct 21 21:57:10.410 INFO kablam! usermod: no changes
Oct 21 21:57:10.464 INFO kablam!     Checking mergesort v0.1.0 (/source)
Oct 21 21:57:11.122 INFO kablam! warning: variable does not need to be mutable
Oct 21 21:57:11.122 INFO kablam!   --> src/main.rs:91:13
Oct 21 21:57:11.122 INFO kablam!    |
Oct 21 21:57:11.122 INFO kablam! 91 |         let mut realhalves = (*real).split_at_mut(halflength);
Oct 21 21:57:11.122 INFO kablam!    |             ----^^^^^^^^^^
Oct 21 21:57:11.122 INFO kablam!    |             |
Oct 21 21:57:11.122 INFO kablam!    |             help: remove this `mut`
Oct 21 21:57:11.122 INFO kablam!    |
Oct 21 21:57:11.122 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 21 21:57:11.122 INFO kablam! 
Oct 21 21:57:11.122 INFO kablam! warning: variable does not need to be mutable
Oct 21 21:57:11.122 INFO kablam!   --> src/main.rs:92:13
Oct 21 21:57:11.122 INFO kablam!    |
Oct 21 21:57:11.122 INFO kablam! 92 |         let mut scratchhalves = (*scratch).split_at_mut(halflength);
Oct 21 21:57:11.122 INFO kablam!    |             ----^^^^^^^^^^^^^
Oct 21 21:57:11.122 INFO kablam!    |             |
Oct 21 21:57:11.122 INFO kablam!    |             help: remove this `mut`
Oct 21 21:57:11.122 INFO kablam! 
Oct 21 21:57:11.264 INFO kablam! warning: variable does not need to be mutable
Oct 21 21:57:11.264 INFO kablam!   --> src/main.rs:91:13
Oct 21 21:57:11.264 INFO kablam!    |
Oct 21 21:57:11.264 INFO kablam! 91 |         let mut realhalves = (*real).split_at_mut(halflength);
Oct 21 21:57:11.264 INFO kablam!    |             ----^^^^^^^^^^
Oct 21 21:57:11.264 INFO kablam!    |             |
Oct 21 21:57:11.264 INFO kablam!    |             help: remove this `mut`
Oct 21 21:57:11.265 INFO kablam!    |
Oct 21 21:57:11.265 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 21 21:57:11.265 INFO kablam! 
Oct 21 21:57:11.265 INFO kablam! warning: variable does not need to be mutable
Oct 21 21:57:11.265 INFO kablam!   --> src/main.rs:92:13
Oct 21 21:57:11.265 INFO kablam!    |
Oct 21 21:57:11.265 INFO kablam! 92 |         let mut scratchhalves = (*scratch).split_at_mut(halflength);
Oct 21 21:57:11.265 INFO kablam!    |             ----^^^^^^^^^^^^^
Oct 21 21:57:11.265 INFO kablam!    |             |
Oct 21 21:57:11.265 INFO kablam!    |             help: remove this `mut`
Oct 21 21:57:11.265 INFO kablam! 
Oct 21 21:57:11.289 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
Oct 21 21:57:11.292 INFO kablam! su: No module specific data is present
Oct 21 21:57:11.840 INFO running `"docker" "rm" "-f" "2e8438c26b7e980573563a6f031403979f1868fa5ee72efa4a4a3b6870e311d7"`
Oct 21 21:57:12.187 INFO blam! 2e8438c26b7e980573563a6f031403979f1868fa5ee72efa4a4a3b6870e311d7