Oct 13 05:26:43.679 INFO checking Bkindmonk/RustPractice against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 05:26:43.681 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-2/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-2/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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 13 05:26:44.416 INFO blam! cdcfc9d78f1eddcac70c31f0883c4a839114759deb682d8921ce49292c7d4013
Oct 13 05:26:44.418 INFO running `"docker" "start" "-a" "cdcfc9d78f1eddcac70c31f0883c4a839114759deb682d8921ce49292c7d4013"`
Oct 13 05:26:45.596 INFO kablam! usermod: no changes
Oct 13 05:26:45.660 INFO kablam!     Checking mergesort v0.1.0 (/source)
Oct 13 05:26:46.800 INFO kablam! warning: variable does not need to be mutable
Oct 13 05:26:46.800 INFO kablam!   --> src/main.rs:91:13
Oct 13 05:26:46.800 INFO kablam!    |
Oct 13 05:26:46.800 INFO kablam! 91 |         let mut realhalves = (*real).split_at_mut(halflength);
Oct 13 05:26:46.800 INFO kablam!    |             ----^^^^^^^^^^
Oct 13 05:26:46.800 INFO kablam!    |             |
Oct 13 05:26:46.800 INFO kablam!    |             help: remove this `mut`
Oct 13 05:26:46.800 INFO kablam!    |
Oct 13 05:26:46.800 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 13 05:26:46.800 INFO kablam! 
Oct 13 05:26:46.800 INFO kablam! warning: variable does not need to be mutable
Oct 13 05:26:46.800 INFO kablam!   --> src/main.rs:92:13
Oct 13 05:26:46.800 INFO kablam!    |
Oct 13 05:26:46.800 INFO kablam! 92 |         let mut scratchhalves = (*scratch).split_at_mut(halflength);
Oct 13 05:26:46.800 INFO kablam!    |             ----^^^^^^^^^^^^^
Oct 13 05:26:46.800 INFO kablam!    |             |
Oct 13 05:26:46.800 INFO kablam!    |             help: remove this `mut`
Oct 13 05:26:46.800 INFO kablam! 
Oct 13 05:26:46.841 INFO kablam! warning: variable does not need to be mutable
Oct 13 05:26:46.841 INFO kablam!   --> src/main.rs:91:13
Oct 13 05:26:46.841 INFO kablam!    |
Oct 13 05:26:46.841 INFO kablam! 91 |         let mut realhalves = (*real).split_at_mut(halflength);
Oct 13 05:26:46.852 INFO kablam!    |             ----^^^^^^^^^^
Oct 13 05:26:46.853 INFO kablam!    |             |
Oct 13 05:26:46.853 INFO kablam!    |             help: remove this `mut`
Oct 13 05:26:46.853 INFO kablam!    |
Oct 13 05:26:46.853 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 13 05:26:46.853 INFO kablam! 
Oct 13 05:26:46.853 INFO kablam! warning: variable does not need to be mutable
Oct 13 05:26:46.853 INFO kablam!   --> src/main.rs:92:13
Oct 13 05:26:46.853 INFO kablam!    |
Oct 13 05:26:46.853 INFO kablam! 92 |         let mut scratchhalves = (*scratch).split_at_mut(halflength);
Oct 13 05:26:46.853 INFO kablam!    |             ----^^^^^^^^^^^^^
Oct 13 05:26:46.853 INFO kablam!    |             |
Oct 13 05:26:46.853 INFO kablam!    |             help: remove this `mut`
Oct 13 05:26:46.853 INFO kablam! 
Oct 13 05:26:46.912 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.29s
Oct 13 05:26:46.940 INFO kablam! su: No module specific data is present
Oct 13 05:26:48.373 INFO running `"docker" "rm" "-f" "cdcfc9d78f1eddcac70c31f0883c4a839114759deb682d8921ce49292c7d4013"`
Oct 13 05:26:48.614 INFO blam! cdcfc9d78f1eddcac70c31f0883c4a839114759deb682d8921ce49292c7d4013