Aug 11 17:23:02.152 INFO checking concurrent-hashmap-0.2.2 against try#a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195+tmplazy for libc-1
Aug 11 17:23:02.152 INFO running: cargo +a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195-alt check --frozen --all --all-targets
Aug 11 17:23:02.152 INFO creating container for: cargo +a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195-alt check --frozen --all --all-targets
Aug 11 17:23:02.152 INFO running `"docker" "create" "-v" "/tmp/crater.9A7nnKMY6OjS:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/libc-1/worker-6/try#a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195+tmplazy:/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" "-v" "/home/ec2-user/crater/./work/local/cargo-home/git:/cargo-home/git:rw,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "crater"`
Aug 11 17:23:02.396 INFO blam! 2c3f1ab0c3c8b988232e598a173c8c93b483b37f20dc07e9f2bd77a735035245
Aug 11 17:23:02.396 INFO running `"docker" "start" "-a" "2c3f1ab0c3c8b988232e598a173c8c93b483b37f20dc07e9f2bd77a735035245"`
Aug 11 17:23:04.005 INFO kablam!     Checking spin v0.4.8
Aug 11 17:23:04.254 INFO kablam!     Checking concurrent-hashmap v0.2.2 (file:///source)
Aug 11 17:23:06.493 INFO kablam! warning: variable does not need to be mutable
Aug 11 17:23:06.493 INFO kablam!    --> src/map.rs:537:13
Aug 11 17:23:06.493 INFO kablam!     |
Aug 11 17:23:06.493 INFO kablam! 537 |         let mut e = map.find_mut(&1).unwrap().get();
Aug 11 17:23:06.493 INFO kablam!     |             ----^
Aug 11 17:23:06.493 INFO kablam!     |             |
Aug 11 17:23:06.493 INFO kablam!     |             help: remove this `mut`
Aug 11 17:23:06.493 INFO kablam!     |
Aug 11 17:23:06.493 INFO kablam!     = note: #[warn(unused_mut)] on by default
Aug 11 17:23:06.494 INFO kablam! 
Aug 11 17:23:06.911 INFO kablam! error[E0635]: unknown feature `step_by`
Aug 11 17:23:06.911 INFO kablam!  --> examples/wordcount.rs:1:12
Aug 11 17:23:06.911 INFO kablam!   |
Aug 11 17:23:06.911 INFO kablam! 1 | #![feature(step_by)]
Aug 11 17:23:06.911 INFO kablam!   |            ^^^^^^^
Aug 11 17:23:06.911 INFO kablam! 
Aug 11 17:23:06.917 INFO kablam! error: aborting due to previous error
Aug 11 17:23:06.917 INFO kablam! 
Aug 11 17:23:06.917 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 11 17:23:06.925 INFO kablam! error: Could not compile `concurrent-hashmap`.
Aug 11 17:23:06.925 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 11 17:23:07.603 INFO kablam! error: build failed
Aug 11 17:23:07.605 INFO kablam! su: No module specific data is present
Aug 11 17:23:08.277 INFO running `"docker" "rm" "-f" "2c3f1ab0c3c8b988232e598a173c8c93b483b37f20dc07e9f2bd77a735035245"`
Aug 11 17:23:08.440 INFO blam! 2c3f1ab0c3c8b988232e598a173c8c93b483b37f20dc07e9f2bd77a735035245