Sep 20 05:10:02.997 INFO checking concurrent-hashmap-0.2.2 against try#135b4cd023a753409d01e43b0f23d22a899feeeb for pr-54352
Sep 20 05:10:02.997 INFO running: cargo +135b4cd023a753409d01e43b0f23d22a899feeeb-alt check --frozen --all --all-targets
Sep 20 05:10:02.997 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-54352/try#135b4cd023a753409d01e43b0f23d22a899feeeb:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54352/worker-2/try#135b4cd023a753409d01e43b0f23d22a899feeeb:/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 +135b4cd023a753409d01e43b0f23d22a899feeeb-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 20 05:10:03.153 INFO blam! f89b6d6873b0eb59b22369dab130c9e5d620d9442788200c4bfe7772a129bf8c
Sep 20 05:10:03.155 INFO running `"docker" "start" "-a" "f89b6d6873b0eb59b22369dab130c9e5d620d9442788200c4bfe7772a129bf8c"`
Sep 20 05:10:04.489 INFO kablam! usermod: no changes
Sep 20 05:10:04.537 INFO kablam!     Checking spin v0.4.8
Sep 20 05:10:04.658 INFO kablam!     Checking concurrent-hashmap v0.2.2 (/source)
Sep 20 05:10:05.458 INFO kablam! warning: variable does not need to be mutable
Sep 20 05:10:05.458 INFO kablam!    --> src/map.rs:537:13
Sep 20 05:10:05.458 INFO kablam!     |
Sep 20 05:10:05.458 INFO kablam! 537 |         let mut e = map.find_mut(&1).unwrap().get();
Sep 20 05:10:05.458 INFO kablam!     |             ----^
Sep 20 05:10:05.458 INFO kablam!     |             |
Sep 20 05:10:05.458 INFO kablam!     |             help: remove this `mut`
Sep 20 05:10:05.458 INFO kablam!     |
Sep 20 05:10:05.458 INFO kablam!     = note: #[warn(unused_mut)] on by default
Sep 20 05:10:05.458 INFO kablam! 
Sep 20 05:10:06.134 INFO kablam! error[E0635]: unknown feature `step_by`
Sep 20 05:10:06.134 INFO kablam!  --> examples/wordcount.rs:1:12
Sep 20 05:10:06.134 INFO kablam!   |
Sep 20 05:10:06.134 INFO kablam! 1 | #![feature(step_by)]
Sep 20 05:10:06.134 INFO kablam!   |            ^^^^^^^
Sep 20 05:10:06.134 INFO kablam! 
Sep 20 05:10:06.150 INFO kablam! error: aborting due to previous error
Sep 20 05:10:06.150 INFO kablam! 
Sep 20 05:10:06.150 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 20 05:10:06.154 INFO kablam! error: Could not compile `concurrent-hashmap`.
Sep 20 05:10:06.154 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 20 05:10:06.270 INFO kablam! error: build failed
Sep 20 05:10:06.272 INFO kablam! su: No module specific data is present
Sep 20 05:10:07.085 INFO running `"docker" "rm" "-f" "f89b6d6873b0eb59b22369dab130c9e5d620d9442788200c4bfe7772a129bf8c"`
Sep 20 05:10:07.170 INFO blam! f89b6d6873b0eb59b22369dab130c9e5d620d9442788200c4bfe7772a129bf8c