Sep 02 00:09:36.999 INFO checking concurrent-hashmap-0.2.2 against try#aa245a5862056b681d2ccdb178f58891108cd3a6 for pr-53831
Sep 02 00:09:36.999 INFO running: cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets
Sep 02 00:09:36.999 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53831/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-2/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/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 +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 02 00:09:37.155 INFO blam! eef22b2d2763228d6794b0e8cd6e5914be134f7d0a9f4814a58c96c50af11279
Sep 02 00:09:37.157 INFO running `"docker" "start" "-a" "eef22b2d2763228d6794b0e8cd6e5914be134f7d0a9f4814a58c96c50af11279"`
Sep 02 00:09:38.006 INFO kablam!     Checking spin v0.4.8
Sep 02 00:09:38.229 INFO kablam!     Checking concurrent-hashmap v0.2.2 (file:///source)
Sep 02 00:09:39.921 INFO kablam! warning: variable does not need to be mutable
Sep 02 00:09:39.921 INFO kablam!    --> src/map.rs:537:13
Sep 02 00:09:39.921 INFO kablam!     |
Sep 02 00:09:39.921 INFO kablam! 537 |         let mut e = map.find_mut(&1).unwrap().get();
Sep 02 00:09:39.921 INFO kablam!     |             ----^
Sep 02 00:09:39.921 INFO kablam!     |             |
Sep 02 00:09:39.921 INFO kablam!     |             help: remove this `mut`
Sep 02 00:09:39.921 INFO kablam!     |
Sep 02 00:09:39.921 INFO kablam!     = note: #[warn(unused_mut)] on by default
Sep 02 00:09:39.921 INFO kablam! 
Sep 02 00:09:40.334 INFO kablam! error[E0635]: unknown feature `step_by`
Sep 02 00:09:40.334 INFO kablam!  --> examples/wordcount.rs:1:12
Sep 02 00:09:40.334 INFO kablam!   |
Sep 02 00:09:40.334 INFO kablam! 1 | #![feature(step_by)]
Sep 02 00:09:40.334 INFO kablam!   |            ^^^^^^^
Sep 02 00:09:40.343 INFO kablam! 
Sep 02 00:09:40.349 INFO kablam! error: aborting due to previous error
Sep 02 00:09:40.349 INFO kablam! 
Sep 02 00:09:40.349 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 02 00:09:40.360 INFO kablam! error: Could not compile `concurrent-hashmap`.
Sep 02 00:09:40.360 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 02 00:09:41.048 INFO kablam! error: build failed
Sep 02 00:09:41.050 INFO kablam! su: No module specific data is present
Sep 02 00:09:41.667 INFO running `"docker" "rm" "-f" "eef22b2d2763228d6794b0e8cd6e5914be134f7d0a9f4814a58c96c50af11279"`
Sep 02 00:09:41.804 INFO blam! eef22b2d2763228d6794b0e8cd6e5914be134f7d0a9f4814a58c96c50af11279