Sep 19 18:42:41.592 INFO checking trie-0.2.0 against try#135b4cd023a753409d01e43b0f23d22a899feeeb for pr-54352
Sep 19 18:42:41.593 INFO running: cargo +135b4cd023a753409d01e43b0f23d22a899feeeb-alt check --frozen --all --all-targets
Sep 19 18:42:41.593 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-54352/try#135b4cd023a753409d01e43b0f23d22a899feeeb:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54352/worker-0/try#135b4cd023a753409d01e43b0f23d22a899feeeb:/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 +135b4cd023a753409d01e43b0f23d22a899feeeb-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 19 18:42:41.839 INFO blam! 47c323ac137eea767ed9356438d51fe0a1b666672213760fafe06ce4f64fc2c5
Sep 19 18:42:41.841 INFO running `"docker" "start" "-a" "47c323ac137eea767ed9356438d51fe0a1b666672213760fafe06ce4f64fc2c5"`
Sep 19 18:42:43.349 INFO kablam! usermod: no changes
Sep 19 18:42:43.514 INFO kablam!     Checking trie v0.2.0 (/source)
Sep 19 18:42:45.261 INFO kablam! error[E0635]: unknown feature `step_by`
Sep 19 18:42:45.261 INFO kablam!   --> src/lib.rs:13:38
Sep 19 18:42:45.261 INFO kablam!    |
Sep 19 18:42:45.261 INFO kablam! 13 | #![cfg_attr(test, feature(fn_traits, step_by, test, unboxed_closures))]
Sep 19 18:42:45.261 INFO kablam!    |                                      ^^^^^^^
Sep 19 18:42:45.261 INFO kablam! 
Sep 19 18:42:45.312 INFO kablam! error: aborting due to previous error
Sep 19 18:42:45.312 INFO kablam! 
Sep 19 18:42:45.313 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 19 18:42:45.322 INFO kablam! error: Could not compile `trie`.
Sep 19 18:42:45.322 INFO kablam! 
Sep 19 18:42:45.322 INFO kablam! To learn more, run the command again with --verbose.
Sep 19 18:42:45.324 INFO kablam! su: No module specific data is present
Sep 19 18:42:46.634 INFO running `"docker" "rm" "-f" "47c323ac137eea767ed9356438d51fe0a1b666672213760fafe06ce4f64fc2c5"`
Sep 19 18:42:46.758 INFO blam! 47c323ac137eea767ed9356438d51fe0a1b666672213760fafe06ce4f64fc2c5