Nov 01 12:57:32.845 INFO checking Bkindmonk/RustPractice against try#d7816399d50d407bbce1efe9dbadf8faaaf568fc for pr-55538
Nov 01 12:57:32.845 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55538/worker-3/try#d7816399d50d407bbce1efe9dbadf8faaaf568fc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-55538/try#d7816399d50d407bbce1efe9dbadf8faaaf568fc:/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 +d7816399d50d407bbce1efe9dbadf8faaaf568fc-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 12:57:33.534 INFO blam! a7eba2038bc2144913cf5470ec0695f16a039663c111f232b631c5a1b532b28d
Nov 01 12:57:33.536 INFO running `"docker" "start" "-a" "a7eba2038bc2144913cf5470ec0695f16a039663c111f232b631c5a1b532b28d"`
Nov 01 12:57:35.344 INFO kablam! usermod: no changes
Nov 01 12:57:35.472 INFO kablam!     Checking mergesort v0.1.0 (/source)
Nov 01 12:57:36.453 INFO kablam! warning: variable does not need to be mutable
Nov 01 12:57:36.453 INFO kablam!   --> src/main.rs:91:13
Nov 01 12:57:36.453 INFO kablam!    |
Nov 01 12:57:36.454 INFO kablam! 91 |         let mut realhalves = (*real).split_at_mut(halflength);
Nov 01 12:57:36.454 INFO kablam!    |             ----^^^^^^^^^^
Nov 01 12:57:36.454 INFO kablam!    |             |
Nov 01 12:57:36.455 INFO kablam!    |             help: remove this `mut`
Nov 01 12:57:36.455 INFO kablam!    |
Nov 01 12:57:36.455 INFO kablam!    = note: #[warn(unused_mut)] on by default
Nov 01 12:57:36.455 INFO kablam! 
Nov 01 12:57:36.456 INFO kablam! warning: variable does not need to be mutable
Nov 01 12:57:36.456 INFO kablam!   --> src/main.rs:92:13
Nov 01 12:57:36.456 INFO kablam!    |
Nov 01 12:57:36.456 INFO kablam! 92 |         let mut scratchhalves = (*scratch).split_at_mut(halflength);
Nov 01 12:57:36.457 INFO kablam!    |             ----^^^^^^^^^^^^^
Nov 01 12:57:36.457 INFO kablam!    |             |
Nov 01 12:57:36.457 INFO kablam!    |             help: remove this `mut`
Nov 01 12:57:36.458 INFO kablam! 
Nov 01 12:57:36.597 INFO kablam! warning: variable does not need to be mutable
Nov 01 12:57:36.597 INFO kablam!   --> src/main.rs:91:13
Nov 01 12:57:36.598 INFO kablam!    |
Nov 01 12:57:36.598 INFO kablam! 91 |         let mut realhalves = (*real).split_at_mut(halflength);
Nov 01 12:57:36.598 INFO kablam!    |             ----^^^^^^^^^^
Nov 01 12:57:36.598 INFO kablam!    |             |
Nov 01 12:57:36.599 INFO kablam!    |             help: remove this `mut`
Nov 01 12:57:36.599 INFO kablam!    |
Nov 01 12:57:36.599 INFO kablam!    = note: #[warn(unused_mut)] on by default
Nov 01 12:57:36.600 INFO kablam! 
Nov 01 12:57:36.600 INFO kablam! warning: variable does not need to be mutable
Nov 01 12:57:36.600 INFO kablam!   --> src/main.rs:92:13
Nov 01 12:57:36.601 INFO kablam!    |
Nov 01 12:57:36.601 INFO kablam! 92 |         let mut scratchhalves = (*scratch).split_at_mut(halflength);
Nov 01 12:57:36.601 INFO kablam!    |             ----^^^^^^^^^^^^^
Nov 01 12:57:36.601 INFO kablam!    |             |
Nov 01 12:57:36.602 INFO kablam!    |             help: remove this `mut`
Nov 01 12:57:36.602 INFO kablam! 
Nov 01 12:57:36.625 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.20s
Nov 01 12:57:36.628 INFO kablam! su: No module specific data is present
Nov 01 12:57:37.745 INFO running `"docker" "rm" "-f" "a7eba2038bc2144913cf5470ec0695f16a039663c111f232b631c5a1b532b28d"`
Nov 01 12:57:38.058 INFO blam! a7eba2038bc2144913cf5470ec0695f16a039663c111f232b631c5a1b532b28d