Sep 04 00:03:31.430 INFO checking trie-0.2.0 against try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0 for pr-53893
Sep 04 00:03:31.431 INFO running: cargo +6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0-alt check --frozen --all --all-targets
Sep 04 00:03:31.431 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53893/try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53893/worker-0/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 00:03:31.645 INFO blam! 1d9486d4a02d60c61afdb9fbdc6375053e5adddc8f979696ef0adbba36110557
Sep 04 00:03:31.647 INFO running `"docker" "start" "-a" "1d9486d4a02d60c61afdb9fbdc6375053e5adddc8f979696ef0adbba36110557"`
Sep 04 00:03:32.358 INFO kablam!     Checking trie v0.2.0 (file:///source)
Sep 04 00:03:34.414 INFO kablam! error[E0635]: unknown feature `step_by`
Sep 04 00:03:34.415 INFO kablam!   --> src/lib.rs:13:38
Sep 04 00:03:34.415 INFO kablam!    |
Sep 04 00:03:34.415 INFO kablam! 13 | #![cfg_attr(test, feature(fn_traits, step_by, test, unboxed_closures))]
Sep 04 00:03:34.415 INFO kablam!    |                                      ^^^^^^^
Sep 04 00:03:34.415 INFO kablam! 
Sep 04 00:03:34.465 INFO kablam! error: aborting due to previous error
Sep 04 00:03:34.465 INFO kablam! 
Sep 04 00:03:34.465 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 04 00:03:34.476 INFO kablam! error: Could not compile `trie`.
Sep 04 00:03:34.476 INFO kablam! 
Sep 04 00:03:34.476 INFO kablam! To learn more, run the command again with --verbose.
Sep 04 00:03:34.477 INFO kablam! su: No module specific data is present
Sep 04 00:03:34.952 INFO running `"docker" "rm" "-f" "1d9486d4a02d60c61afdb9fbdc6375053e5adddc8f979696ef0adbba36110557"`
Sep 04 00:03:35.055 INFO blam! 1d9486d4a02d60c61afdb9fbdc6375053e5adddc8f979696ef0adbba36110557