Nov 04 14:31:40.384 INFO checking Bkindmonk/RustPractice against try#e740b9aa0b624fa39feb39613e76d15bdf57e594 for pr-55655
Nov 04 14:31:40.384 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55655/worker-6/try#e740b9aa0b624fa39feb39613e76d15bdf57e594:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-55655/try#e740b9aa0b624fa39feb39613e76d15bdf57e594:/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 +e740b9aa0b624fa39feb39613e76d15bdf57e594-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 04 14:31:41.164 INFO blam! 70922cf42dc2445ffdd54d1221ccede57163e6de7bd8e0faf20799c429ff9d69
Nov 04 14:31:41.167 INFO running `"docker" "start" "-a" "70922cf42dc2445ffdd54d1221ccede57163e6de7bd8e0faf20799c429ff9d69"`
Nov 04 14:31:42.807 INFO kablam! usermod: no changes
Nov 04 14:31:42.863 INFO kablam!     Checking mergesort v0.1.0 (/source)
Nov 04 14:31:44.007 INFO kablam! warning: variable does not need to be mutable
Nov 04 14:31:44.007 INFO kablam!   --> src/main.rs:91:13
Nov 04 14:31:44.007 INFO kablam!    |
Nov 04 14:31:44.007 INFO kablam! 91 |         let mut realhalves = (*real).split_at_mut(halflength);
Nov 04 14:31:44.007 INFO kablam!    |             ----^^^^^^^^^^
Nov 04 14:31:44.007 INFO kablam!    |             |
Nov 04 14:31:44.007 INFO kablam!    |             help: remove this `mut`
Nov 04 14:31:44.007 INFO kablam!    |
Nov 04 14:31:44.007 INFO kablam!    = note: #[warn(unused_mut)] on by default
Nov 04 14:31:44.007 INFO kablam! 
Nov 04 14:31:44.007 INFO kablam! warning: variable does not need to be mutable
Nov 04 14:31:44.007 INFO kablam!   --> src/main.rs:92:13
Nov 04 14:31:44.007 INFO kablam!    |
Nov 04 14:31:44.007 INFO kablam! 92 |         let mut scratchhalves = (*scratch).split_at_mut(halflength);
Nov 04 14:31:44.007 INFO kablam!    |             ----^^^^^^^^^^^^^
Nov 04 14:31:44.007 INFO kablam!    |             |
Nov 04 14:31:44.007 INFO kablam!    |             help: remove this `mut`
Nov 04 14:31:44.007 INFO kablam! 
Nov 04 14:31:44.214 INFO kablam! warning: variable does not need to be mutable
Nov 04 14:31:44.214 INFO kablam!   --> src/main.rs:91:13
Nov 04 14:31:44.215 INFO kablam!    |
Nov 04 14:31:44.215 INFO kablam! 91 |         let mut realhalves = (*real).split_at_mut(halflength);
Nov 04 14:31:44.215 INFO kablam!    |             ----^^^^^^^^^^
Nov 04 14:31:44.216 INFO kablam!    |             |
Nov 04 14:31:44.216 INFO kablam!    |             help: remove this `mut`
Nov 04 14:31:44.216 INFO kablam!    |
Nov 04 14:31:44.216 INFO kablam!    = note: #[warn(unused_mut)] on by default
Nov 04 14:31:44.217 INFO kablam! 
Nov 04 14:31:44.217 INFO kablam! warning: variable does not need to be mutable
Nov 04 14:31:44.217 INFO kablam!   --> src/main.rs:92:13
Nov 04 14:31:44.217 INFO kablam!    |
Nov 04 14:31:44.218 INFO kablam! 92 |         let mut scratchhalves = (*scratch).split_at_mut(halflength);
Nov 04 14:31:44.218 INFO kablam!    |             ----^^^^^^^^^^^^^
Nov 04 14:31:44.218 INFO kablam!    |             |
Nov 04 14:31:44.219 INFO kablam!    |             help: remove this `mut`
Nov 04 14:31:44.219 INFO kablam! 
Nov 04 14:31:44.241 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.40s
Nov 04 14:31:44.241 INFO kablam! su: No module specific data is present
Nov 04 14:31:44.955 INFO running `"docker" "rm" "-f" "70922cf42dc2445ffdd54d1221ccede57163e6de7bd8e0faf20799c429ff9d69"`
Nov 04 14:31:45.218 INFO blam! 70922cf42dc2445ffdd54d1221ccede57163e6de7bd8e0faf20799c429ff9d69