Sep 04 21:03:38.449 INFO checking concurrent-hashmap-0.2.2 against try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0 for pr-53893
Sep 04 21:03:38.449 INFO running: cargo +6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0-alt check --frozen --all --all-targets
Sep 04 21:03:38.449 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53893/try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53893/worker-1/try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0:/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 +6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 21:03:38.613 INFO blam! 26245ae760ba8061606ed2bf31a029eb31c16bf336260864e1a9311c6ed452e3
Sep 04 21:03:38.615 INFO running `"docker" "start" "-a" "26245ae760ba8061606ed2bf31a029eb31c16bf336260864e1a9311c6ed452e3"`
Sep 04 21:03:39.390 INFO kablam!     Checking concurrent-hashmap v0.2.2 (file:///source)
Sep 04 21:03:40.914 INFO kablam! warning: variable does not need to be mutable
Sep 04 21:03:40.914 INFO kablam!    --> src/map.rs:537:13
Sep 04 21:03:40.914 INFO kablam!     |
Sep 04 21:03:40.914 INFO kablam! 537 |         let mut e = map.find_mut(&1).unwrap().get();
Sep 04 21:03:40.914 INFO kablam!     |             ----^
Sep 04 21:03:40.914 INFO kablam!     |             |
Sep 04 21:03:40.914 INFO kablam!     |             help: remove this `mut`
Sep 04 21:03:40.914 INFO kablam!     |
Sep 04 21:03:40.914 INFO kablam!     = note: #[warn(unused_mut)] on by default
Sep 04 21:03:40.914 INFO kablam! 
Sep 04 21:03:41.565 INFO kablam! error[E0635]: unknown feature `step_by`
Sep 04 21:03:41.565 INFO kablam!  --> examples/wordcount.rs:1:12
Sep 04 21:03:41.565 INFO kablam!   |
Sep 04 21:03:41.565 INFO kablam! 1 | #![feature(step_by)]
Sep 04 21:03:41.565 INFO kablam!   |            ^^^^^^^
Sep 04 21:03:41.566 INFO kablam! 
Sep 04 21:03:41.570 INFO kablam! error: aborting due to previous error
Sep 04 21:03:41.570 INFO kablam! 
Sep 04 21:03:41.571 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 04 21:03:41.579 INFO kablam! error: Could not compile `concurrent-hashmap`.
Sep 04 21:03:41.580 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 04 21:03:41.935 INFO kablam! error: build failed
Sep 04 21:03:41.937 INFO kablam! su: No module specific data is present
Sep 04 21:03:42.451 INFO running `"docker" "rm" "-f" "26245ae760ba8061606ed2bf31a029eb31c16bf336260864e1a9311c6ed452e3"`
Sep 04 21:03:42.613 INFO blam! 26245ae760ba8061606ed2bf31a029eb31c16bf336260864e1a9311c6ed452e3