Sep 21 11:59:52.574 INFO checking config-0.9.0 against master#f7f4c500b46603386e940f116b469c7adc043a6d for pr-54394
Sep 21 11:59:52.574 INFO running: cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets
Sep 21 11:59:52.574 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-54394/master#f7f4c500b46603386e940f116b469c7adc043a6d:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-2/master#f7f4c500b46603386e940f116b469c7adc043a6d:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "CMD=cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 21 11:59:52.750 INFO blam! f4078fb23207168d57a36aca2c369c6e1db6a04272939dab0f76b09723536f83
Sep 21 11:59:52.752 INFO running `"docker" "start" "-a" "f4078fb23207168d57a36aca2c369c6e1db6a04272939dab0f76b09723536f83"`
Sep 21 11:59:53.529 INFO kablam! usermod: no changes
Sep 21 11:59:53.654 INFO kablam!     Checking config v0.9.0 (/source)
Sep 21 12:00:03.426 INFO kablam! warning: variable does not need to be mutable
Sep 21 12:00:03.426 INFO kablam!   --> tests/env.rs:57:9
Sep 21 12:00:03.426 INFO kablam!    |
Sep 21 12:00:03.426 INFO kablam! 57 |     let mut environment = Environment::with_prefix("C").separator("_");
Sep 21 12:00:03.426 INFO kablam!    |         ----^^^^^^^^^^^
Sep 21 12:00:03.426 INFO kablam!    |         |
Sep 21 12:00:03.426 INFO kablam!    |         help: remove this `mut`
Sep 21 12:00:03.426 INFO kablam!    |
Sep 21 12:00:03.426 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 21 12:00:03.426 INFO kablam! 
Sep 21 12:00:04.189 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 10.64s
Sep 21 12:00:04.197 INFO kablam! su: No module specific data is present
Sep 21 12:00:04.923 INFO running `"docker" "rm" "-f" "f4078fb23207168d57a36aca2c369c6e1db6a04272939dab0f76b09723536f83"`
Sep 21 12:00:04.991 INFO blam! f4078fb23207168d57a36aca2c369c6e1db6a04272939dab0f76b09723536f83