Sep 14 18:15:22.888 INFO checking concurrent-hashmap-0.2.2 against master#90d36fb5905bbe5004f5b465ea14b53d10dae260 for pr-53578-1
Sep 14 18:15:22.888 INFO running: cargo +90d36fb5905bbe5004f5b465ea14b53d10dae260-alt check --frozen --all --all-targets
Sep 14 18:15:22.888 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53578-1/master#90d36fb5905bbe5004f5b465ea14b53d10dae260:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578-1/worker-3/master#90d36fb5905bbe5004f5b465ea14b53d10dae260:/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 +90d36fb5905bbe5004f5b465ea14b53d10dae260-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 14 18:15:23.085 INFO blam! ae69dd012bd3d7779173536da969ac2a0c20aa750b30ed0d66d057b5fda82015
Sep 14 18:15:23.091 INFO running `"docker" "start" "-a" "ae69dd012bd3d7779173536da969ac2a0c20aa750b30ed0d66d057b5fda82015"`
Sep 14 18:15:24.080 INFO kablam! usermod: no changes
Sep 14 18:15:24.120 INFO kablam!     Checking spin v0.4.8
Sep 14 18:15:24.259 INFO kablam!     Checking concurrent-hashmap v0.2.2 (file:///source)
Sep 14 18:15:25.090 INFO kablam! warning: variable does not need to be mutable
Sep 14 18:15:25.090 INFO kablam!    --> src/map.rs:537:13
Sep 14 18:15:25.090 INFO kablam!     |
Sep 14 18:15:25.090 INFO kablam! 537 |         let mut e = map.find_mut(&1).unwrap().get();
Sep 14 18:15:25.090 INFO kablam!     |             ----^
Sep 14 18:15:25.090 INFO kablam!     |             |
Sep 14 18:15:25.090 INFO kablam!     |             help: remove this `mut`
Sep 14 18:15:25.090 INFO kablam!     |
Sep 14 18:15:25.090 INFO kablam!     = note: #[warn(unused_mut)] on by default
Sep 14 18:15:25.090 INFO kablam! 
Sep 14 18:15:25.254 INFO kablam! error[E0635]: unknown feature `step_by`
Sep 14 18:15:25.255 INFO kablam!  --> examples/wordcount.rs:1:12
Sep 14 18:15:25.255 INFO kablam!   |
Sep 14 18:15:25.255 INFO kablam! 1 | #![feature(step_by)]
Sep 14 18:15:25.255 INFO kablam!   |            ^^^^^^^
Sep 14 18:15:25.255 INFO kablam! 
Sep 14 18:15:25.255 INFO kablam! error: aborting due to previous error
Sep 14 18:15:25.255 INFO kablam! 
Sep 14 18:15:25.255 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 14 18:15:25.270 INFO kablam! error: Could not compile `concurrent-hashmap`.
Sep 14 18:15:25.270 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 14 18:15:25.502 INFO kablam! error: build failed
Sep 14 18:15:25.503 INFO kablam! su: No module specific data is present
Sep 14 18:15:26.132 INFO running `"docker" "rm" "-f" "ae69dd012bd3d7779173536da969ac2a0c20aa750b30ed0d66d057b5fda82015"`
Sep 14 18:15:26.239 INFO blam! ae69dd012bd3d7779173536da969ac2a0c20aa750b30ed0d66d057b5fda82015