Sep 01 07:37:30.632 INFO checking config-0.9.0 against try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b for pr-53578
Sep 01 07:37:30.632 INFO running: cargo +a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b-alt check --frozen --all --all-targets
Sep 01 07:37:30.632 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53578/try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578/worker-0/try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b:/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=500" "-e" "CMD=cargo +a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 07:37:30.854 INFO blam! bdf55792763cebf76a02401506d296ce440041e464a22610fd643f8549618f3c
Sep 01 07:37:30.856 INFO running `"docker" "start" "-a" "bdf55792763cebf76a02401506d296ce440041e464a22610fd643f8549618f3c"`
Sep 01 07:37:31.635 INFO kablam!     Checking config v0.9.0 (file:///source)
Sep 01 07:37:46.638 INFO kablam! warning: variable does not need to be mutable
Sep 01 07:37:46.638 INFO kablam!   --> tests/env.rs:57:9
Sep 01 07:37:46.638 INFO kablam!    |
Sep 01 07:37:46.638 INFO kablam! 57 |     let mut environment = Environment::with_prefix("C").separator("_");
Sep 01 07:37:46.638 INFO kablam!    |         ----^^^^^^^^^^^
Sep 01 07:37:46.638 INFO kablam!    |         |
Sep 01 07:37:46.638 INFO kablam!    |         help: remove this `mut`
Sep 01 07:37:46.646 INFO kablam!    |
Sep 01 07:37:46.647 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 01 07:37:46.647 INFO kablam! 
Sep 01 07:37:55.705 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 24.18s
Sep 01 07:37:55.721 INFO kablam! su: No module specific data is present
Sep 01 07:37:56.057 INFO running `"docker" "rm" "-f" "bdf55792763cebf76a02401506d296ce440041e464a22610fd643f8549618f3c"`
Sep 01 07:37:56.145 INFO blam! bdf55792763cebf76a02401506d296ce440041e464a22610fd643f8549618f3c