Sep 04 23:55:52.642 INFO checking concurrent-hashmap-0.2.2 against try#5fe695a3844714c70e8f7731a553f7947987a68a for pr-53913
Sep 04 23:55:52.642 INFO running: cargo +5fe695a3844714c70e8f7731a553f7947987a68a-alt check --frozen --all --all-targets
Sep 04 23:55:52.642 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53913/try#5fe695a3844714c70e8f7731a553f7947987a68a:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53913/worker-2/try#5fe695a3844714c70e8f7731a553f7947987a68a:/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 +5fe695a3844714c70e8f7731a553f7947987a68a-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 23:55:52.891 INFO blam! 6bd56ad4b7ff891f27f222a57999e4175dc0ad5956a9872b1bba9aa6f5330eec
Sep 04 23:55:52.892 INFO running `"docker" "start" "-a" "6bd56ad4b7ff891f27f222a57999e4175dc0ad5956a9872b1bba9aa6f5330eec"`
Sep 04 23:55:53.606 INFO kablam!     Checking spin v0.4.8
Sep 04 23:55:53.804 INFO kablam!     Checking concurrent-hashmap v0.2.2 (file:///source)
Sep 04 23:55:55.408 INFO kablam! warning: variable does not need to be mutable
Sep 04 23:55:55.408 INFO kablam!    --> src/map.rs:537:13
Sep 04 23:55:55.408 INFO kablam!     |
Sep 04 23:55:55.408 INFO kablam! 537 |         let mut e = map.find_mut(&1).unwrap().get();
Sep 04 23:55:55.408 INFO kablam!     |             ----^
Sep 04 23:55:55.408 INFO kablam!     |             |
Sep 04 23:55:55.408 INFO kablam!     |             help: remove this `mut`
Sep 04 23:55:55.408 INFO kablam!     |
Sep 04 23:55:55.408 INFO kablam!     = note: #[warn(unused_mut)] on by default
Sep 04 23:55:55.408 INFO kablam! 
Sep 04 23:55:56.008 INFO kablam! error[E0635]: unknown feature `step_by`
Sep 04 23:55:56.008 INFO kablam!  --> examples/wordcount.rs:1:12
Sep 04 23:55:56.008 INFO kablam!   |
Sep 04 23:55:56.008 INFO kablam! 1 | #![feature(step_by)]
Sep 04 23:55:56.008 INFO kablam!   |            ^^^^^^^
Sep 04 23:55:56.024 INFO kablam! 
Sep 04 23:55:56.030 INFO kablam! error: aborting due to previous error
Sep 04 23:55:56.036 INFO kablam! 
Sep 04 23:55:56.037 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 04 23:55:56.065 INFO kablam! error: Could not compile `concurrent-hashmap`.
Sep 04 23:55:56.065 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 04 23:55:56.852 INFO kablam! error: build failed
Sep 04 23:55:56.853 INFO kablam! su: No module specific data is present
Sep 04 23:55:57.474 INFO running `"docker" "rm" "-f" "6bd56ad4b7ff891f27f222a57999e4175dc0ad5956a9872b1bba9aa6f5330eec"`
Sep 04 23:55:57.611 INFO blam! 6bd56ad4b7ff891f27f222a57999e4175dc0ad5956a9872b1bba9aa6f5330eec