Sep 04 11:16:41.333 INFO checking maze-0.1.2 against master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c for pr-53893
Sep 04 11:16:41.333 INFO running: cargo +28bcffead74d5e17c6cb1f7de432e37f93a6b50c-alt check --frozen --all --all-targets
Sep 04 11:16:41.333 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53893/master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53893/worker-3/master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c:/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 +28bcffead74d5e17c6cb1f7de432e37f93a6b50c-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 11:16:41.499 INFO blam! c7bd7f387457483b3a70f5491c9944ccbec9b097a8b03128cb3655c563df02eb
Sep 04 11:16:41.500 INFO running `"docker" "start" "-a" "c7bd7f387457483b3a70f5491c9944ccbec9b097a8b03128cb3655c563df02eb"`
Sep 04 11:16:42.538 INFO kablam!     Checking png v0.5.2
Sep 04 11:16:42.538 INFO kablam!     Checking hyper v0.9.12
Sep 04 11:16:42.540 INFO kablam!     Checking nalgebra v0.5.1
Sep 04 11:16:45.231 INFO kablam!     Checking image v0.10.4
Sep 04 11:16:51.912 INFO kablam!     Checking iron v0.4.0
Sep 04 11:16:55.417 INFO kablam!     Checking persistent v0.2.1
Sep 04 11:16:55.420 INFO kablam!     Checking router v0.4.0
Sep 04 11:16:59.283 INFO kablam!     Checking bodyparser v0.4.1
Sep 04 11:17:01.841 INFO kablam!     Checking imageproc v0.6.1
Sep 04 11:17:02.147 INFO kablam!     Checking urlencoded v0.4.1
Sep 04 11:17:06.387 INFO kablam!     Checking maze v0.1.2 (file:///source)
Sep 04 11:17:11.773 INFO kablam! warning: variable does not need to be mutable
Sep 04 11:17:11.773 INFO kablam!    --> src/types/grid.rs:191:13
Sep 04 11:17:11.773 INFO kablam!     |
Sep 04 11:17:11.773 INFO kablam! 191 |         let mut grid = self;
Sep 04 11:17:11.773 INFO kablam!     |             ----^^^^
Sep 04 11:17:11.773 INFO kablam!     |             |
Sep 04 11:17:11.773 INFO kablam!     |             help: remove this `mut`
Sep 04 11:17:11.774 INFO kablam!     |
Sep 04 11:17:11.774 INFO kablam!     = note: #[warn(unused_mut)] on by default
Sep 04 11:17:11.774 INFO kablam! 
Sep 04 11:17:11.802 INFO kablam! warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
Sep 04 11:17:11.802 INFO kablam!  --> src/lib.rs:2:12
Sep 04 11:17:11.802 INFO kablam!   |
Sep 04 11:17:11.802 INFO kablam! 2 | #![feature(proc_macro)]
Sep 04 11:17:11.802 INFO kablam!   |            ^^^^^^^^^^
Sep 04 11:17:11.802 INFO kablam!   |
Sep 04 11:17:11.802 INFO kablam!   = note: #[warn(stable_features)] on by default
Sep 04 11:17:11.802 INFO kablam! 
Sep 04 11:17:12.492 INFO kablam! warning: variable does not need to be mutable
Sep 04 11:17:12.492 INFO kablam!    --> src/types/grid.rs:191:13
Sep 04 11:17:12.492 INFO kablam!     |
Sep 04 11:17:12.493 INFO kablam! 191 |         let mut grid = self;
Sep 04 11:17:12.493 INFO kablam!     |             ----^^^^
Sep 04 11:17:12.493 INFO kablam!     |             |
Sep 04 11:17:12.493 INFO kablam!     |             help: remove this `mut`
Sep 04 11:17:12.493 INFO kablam!     |
Sep 04 11:17:12.493 INFO kablam!     = note: #[warn(unused_mut)] on by default
Sep 04 11:17:12.493 INFO kablam! 
Sep 04 11:17:12.533 INFO kablam! warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
Sep 04 11:17:12.533 INFO kablam!  --> src/lib.rs:2:12
Sep 04 11:17:12.533 INFO kablam!   |
Sep 04 11:17:12.533 INFO kablam! 2 | #![feature(proc_macro)]
Sep 04 11:17:12.533 INFO kablam!   |            ^^^^^^^^^^
Sep 04 11:17:12.534 INFO kablam!   |
Sep 04 11:17:12.534 INFO kablam!   = note: #[warn(stable_features)] on by default
Sep 04 11:17:12.534 INFO kablam! 
Sep 04 11:17:18.289 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 35.97s
Sep 04 11:17:18.305 INFO kablam! su: No module specific data is present
Sep 04 11:17:18.830 INFO running `"docker" "rm" "-f" "c7bd7f387457483b3a70f5491c9944ccbec9b097a8b03128cb3655c563df02eb"`
Sep 04 11:17:18.916 INFO blam! c7bd7f387457483b3a70f5491c9944ccbec9b097a8b03128cb3655c563df02eb