Nov 01 12:57:35.832 INFO checking Bkindmonk/RustPractice against master#05812fa8c588473f03e3fa7cf59cd84f4f37c715 for pr-55538
Nov 01 12:57:35.833 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55538/worker-6/master#05812fa8c588473f03e3fa7cf59cd84f4f37c715:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-55538/master#05812fa8c588473f03e3fa7cf59cd84f4f37c715:/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 +05812fa8c588473f03e3fa7cf59cd84f4f37c715-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 01 12:57:36.253 INFO blam! d555427a7a0785fa40c90cb361c04a498df9ed90d08e68cacfd3ea8c54d26e86
Nov 01 12:57:36.255 INFO running `"docker" "start" "-a" "d555427a7a0785fa40c90cb361c04a498df9ed90d08e68cacfd3ea8c54d26e86"`
Nov 01 12:57:37.760 INFO kablam! usermod: no changes
Nov 01 12:57:37.840 INFO kablam!     Checking mergesort v0.1.0 (/source)
Nov 01 12:57:38.884 INFO kablam! warning: variable does not need to be mutable
Nov 01 12:57:38.884 INFO kablam!   --> src/main.rs:91:13
Nov 01 12:57:38.885 INFO kablam!    |
Nov 01 12:57:38.885 INFO kablam! 91 |         let mut realhalves = (*real).split_at_mut(halflength);
Nov 01 12:57:38.885 INFO kablam!    |             ----^^^^^^^^^^
Nov 01 12:57:38.885 INFO kablam!    |             |
Nov 01 12:57:38.885 INFO kablam!    |             help: remove this `mut`
Nov 01 12:57:38.885 INFO kablam!    |
Nov 01 12:57:38.886 INFO kablam!    = note: #[warn(unused_mut)] on by default
Nov 01 12:57:38.886 INFO kablam! 
Nov 01 12:57:38.886 INFO kablam! warning: variable does not need to be mutable
Nov 01 12:57:38.886 INFO kablam!   --> src/main.rs:92:13
Nov 01 12:57:38.886 INFO kablam!    |
Nov 01 12:57:38.886 INFO kablam! 92 |         let mut scratchhalves = (*scratch).split_at_mut(halflength);
Nov 01 12:57:38.887 INFO kablam!    |             ----^^^^^^^^^^^^^
Nov 01 12:57:38.887 INFO kablam!    |             |
Nov 01 12:57:38.887 INFO kablam!    |             help: remove this `mut`
Nov 01 12:57:38.887 INFO kablam! 
Nov 01 12:57:38.952 INFO kablam! warning: variable does not need to be mutable
Nov 01 12:57:38.953 INFO kablam!   --> src/main.rs:91:13
Nov 01 12:57:38.953 INFO kablam!    |
Nov 01 12:57:38.953 INFO kablam! 91 |         let mut realhalves = (*real).split_at_mut(halflength);
Nov 01 12:57:38.954 INFO kablam!    |             ----^^^^^^^^^^
Nov 01 12:57:38.954 INFO kablam!    |             |
Nov 01 12:57:38.954 INFO kablam!    |             help: remove this `mut`
Nov 01 12:57:38.954 INFO kablam!    |
Nov 01 12:57:38.955 INFO kablam!    = note: #[warn(unused_mut)] on by default
Nov 01 12:57:38.955 INFO kablam! 
Nov 01 12:57:38.955 INFO kablam! warning: variable does not need to be mutable
Nov 01 12:57:38.955 INFO kablam!   --> src/main.rs:92:13
Nov 01 12:57:38.956 INFO kablam!    |
Nov 01 12:57:38.956 INFO kablam! 92 |         let mut scratchhalves = (*scratch).split_at_mut(halflength);
Nov 01 12:57:38.956 INFO kablam!    |             ----^^^^^^^^^^^^^
Nov 01 12:57:38.956 INFO kablam!    |             |
Nov 01 12:57:38.957 INFO kablam!    |             help: remove this `mut`
Nov 01 12:57:38.957 INFO kablam! 
Nov 01 12:57:38.988 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.20s
Nov 01 12:57:38.996 INFO kablam! su: No module specific data is present
Nov 01 12:57:40.178 INFO running `"docker" "rm" "-f" "d555427a7a0785fa40c90cb361c04a498df9ed90d08e68cacfd3ea8c54d26e86"`
Nov 01 12:57:40.502 INFO blam! d555427a7a0785fa40c90cb361c04a498df9ed90d08e68cacfd3ea8c54d26e86