Sep 10 08:05:21.830 INFO checking tap-0.3.0 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 08:05:21.830 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 08:05:21.830 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-6/pr-54090/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-6/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/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 +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 08:05:22.074 INFO blam! f604e5d3d2bb276d0ef95d6ec860baf2e9f0dc816c085f2b19078c49e5c68aff
Sep 10 08:05:22.076 INFO running `"docker" "start" "-a" "f604e5d3d2bb276d0ef95d6ec860baf2e9f0dc816c085f2b19078c49e5c68aff"`
Sep 10 08:05:23.550 INFO kablam! usermod: no changes
Sep 10 08:05:23.586 INFO kablam!     Checking tap v0.3.0 (file:///source)
Sep 10 08:05:23.872 INFO kablam! warning: unused `#[macro_use]` import
Sep 10 08:05:23.872 INFO kablam!   --> src/lib.rs:14:18
Sep 10 08:05:23.872 INFO kablam!    |
Sep 10 08:05:23.872 INFO kablam! 14 | #[cfg_attr(test, macro_use)]
Sep 10 08:05:23.872 INFO kablam!    |                  ^^^^^^^^^^
Sep 10 08:05:23.872 INFO kablam!    |
Sep 10 08:05:23.872 INFO kablam!    = note: #[warn(unused_imports)] on by default
Sep 10 08:05:23.872 INFO kablam! 
Sep 10 08:05:24.054 INFO kablam! warning: variable does not need to be mutable
Sep 10 08:05:24.054 INFO kablam!   --> src/lib.rs:78:21
Sep 10 08:05:24.054 INFO kablam!    |
Sep 10 08:05:24.054 INFO kablam! 78 |         if let Some(mut val) = self.as_mut() {
Sep 10 08:05:24.054 INFO kablam!    |                     ----^^^
Sep 10 08:05:24.054 INFO kablam!    |                     |
Sep 10 08:05:24.054 INFO kablam!    |                     help: remove this `mut`
Sep 10 08:05:24.054 INFO kablam!    |
Sep 10 08:05:24.054 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 10 08:05:24.054 INFO kablam! 
Sep 10 08:05:24.082 INFO kablam! warning: variable does not need to be mutable
Sep 10 08:05:24.082 INFO kablam!    --> src/lib.rs:141:33
Sep 10 08:05:24.082 INFO kablam!     |
Sep 10 08:05:24.082 INFO kablam! 141 |         let mutated = base.tap(|mut arr| for elt in arr.iter_mut() {
Sep 10 08:05:24.082 INFO kablam!     |                                 ----^^^
Sep 10 08:05:24.082 INFO kablam!     |                                 |
Sep 10 08:05:24.082 INFO kablam!     |                                 help: remove this `mut`
Sep 10 08:05:24.082 INFO kablam! 
Sep 10 08:05:24.082 INFO kablam! warning: variable does not need to be mutable
Sep 10 08:05:24.082 INFO kablam!   --> src/lib.rs:78:21
Sep 10 08:05:24.082 INFO kablam!    |
Sep 10 08:05:24.082 INFO kablam! 78 |         if let Some(mut val) = self.as_mut() {
Sep 10 08:05:24.082 INFO kablam!    |                     ----^^^
Sep 10 08:05:24.082 INFO kablam!    |                     |
Sep 10 08:05:24.082 INFO kablam!    |                     help: remove this `mut`
Sep 10 08:05:24.082 INFO kablam!    |
Sep 10 08:05:24.082 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 10 08:05:24.082 INFO kablam! 
Sep 10 08:05:24.510 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.94s
Sep 10 08:05:24.514 INFO kablam! su: No module specific data is present
Sep 10 08:05:25.705 INFO running `"docker" "rm" "-f" "f604e5d3d2bb276d0ef95d6ec860baf2e9f0dc816c085f2b19078c49e5c68aff"`
Sep 10 08:05:25.824 INFO blam! f604e5d3d2bb276d0ef95d6ec860baf2e9f0dc816c085f2b19078c49e5c68aff