Sep 04 23:55:53.249 INFO checking concurrent-hashmap-0.2.2 against master#2687112ea6a8701cbf36e6dd4d77d64694cf93d8 for pr-53913
Sep 04 23:55:53.249 INFO running: cargo +2687112ea6a8701cbf36e6dd4d77d64694cf93d8-alt check --frozen --all --all-targets
Sep 04 23:55:53.249 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53913/master#2687112ea6a8701cbf36e6dd4d77d64694cf93d8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53913/worker-3/master#2687112ea6a8701cbf36e6dd4d77d64694cf93d8:/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 +2687112ea6a8701cbf36e6dd4d77d64694cf93d8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 23:55:53.410 INFO blam! fadc05e9b88fa95794594fb00ff964612f7333d88d6dca2288eda468b12c9068
Sep 04 23:55:53.412 INFO running `"docker" "start" "-a" "fadc05e9b88fa95794594fb00ff964612f7333d88d6dca2288eda468b12c9068"`
Sep 04 23:55:54.218 INFO kablam!     Checking spin v0.4.8
Sep 04 23:55:54.407 INFO kablam!     Checking concurrent-hashmap v0.2.2 (file:///source)
Sep 04 23:55:56.647 INFO kablam! warning: variable does not need to be mutable
Sep 04 23:55:56.647 INFO kablam!    --> src/map.rs:537:13
Sep 04 23:55:56.647 INFO kablam!     |
Sep 04 23:55:56.647 INFO kablam! 537 |         let mut e = map.find_mut(&1).unwrap().get();
Sep 04 23:55:56.647 INFO kablam!     |             ----^
Sep 04 23:55:56.647 INFO kablam!     |             |
Sep 04 23:55:56.647 INFO kablam!     |             help: remove this `mut`
Sep 04 23:55:56.647 INFO kablam!     |
Sep 04 23:55:56.647 INFO kablam!     = note: #[warn(unused_mut)] on by default
Sep 04 23:55:56.647 INFO kablam! 
Sep 04 23:55:57.381 INFO kablam! error[E0635]: unknown feature `step_by`
Sep 04 23:55:57.381 INFO kablam!  --> examples/wordcount.rs:1:12
Sep 04 23:55:57.381 INFO kablam!   |
Sep 04 23:55:57.381 INFO kablam! 1 | #![feature(step_by)]
Sep 04 23:55:57.381 INFO kablam!   |            ^^^^^^^
Sep 04 23:55:57.381 INFO kablam! 
Sep 04 23:55:57.384 INFO kablam! error: aborting due to previous error
Sep 04 23:55:57.384 INFO kablam! 
Sep 04 23:55:57.384 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 04 23:55:57.391 INFO kablam! error: Could not compile `concurrent-hashmap`.
Sep 04 23:55:57.391 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 04 23:55:57.786 INFO kablam! error: build failed
Sep 04 23:55:57.788 INFO kablam! su: No module specific data is present
Sep 04 23:55:58.405 INFO running `"docker" "rm" "-f" "fadc05e9b88fa95794594fb00ff964612f7333d88d6dca2288eda468b12c9068"`
Sep 04 23:55:58.491 INFO blam! fadc05e9b88fa95794594fb00ff964612f7333d88d6dca2288eda468b12c9068