Sep 17 18:55:16.220 INFO checking rfcalcs-0.1.1 against master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690 for pr-54033
Sep 17 18:55:16.220 INFO running: cargo +cb6d2dfa8923902b0992a1522dc4a45a9d3ba690-alt check --frozen --all --all-targets
Sep 17 18:55:16.221 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-54033/master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54033/worker-0/master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690:/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 +cb6d2dfa8923902b0992a1522dc4a45a9d3ba690-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 17 18:55:16.517 INFO blam! facb8ba285154756a11c7015aa6389fc92787c5869c787888d11495d83bf570a
Sep 17 18:55:16.519 INFO running `"docker" "start" "-a" "facb8ba285154756a11c7015aa6389fc92787c5869c787888d11495d83bf570a"`
Sep 17 18:55:17.448 INFO kablam! usermod: no changes
Sep 17 18:55:17.475 INFO kablam!     Checking rfcalcs v0.1.1 (/source)
Sep 17 18:55:17.625 INFO kablam! error[E0658]: attributes on expressions are experimental. (see issue #15701)
Sep 17 18:55:17.625 INFO kablam!   --> src/lib.rs:33:9
Sep 17 18:55:17.625 INFO kablam!    |
Sep 17 18:55:17.625 INFO kablam! 33 |         /// Test against precalculated results
Sep 17 18:55:17.625 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 17 18:55:17.626 INFO kablam!    |
Sep 17 18:55:17.626 INFO kablam!    = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
Sep 17 18:55:17.626 INFO kablam!    = help: `///` is for documentation comments. For a plain comment, use `//`.
Sep 17 18:55:17.626 INFO kablam! 
Sep 17 18:55:17.630 INFO kablam! error: aborting due to previous error
Sep 17 18:55:17.630 INFO kablam! 
Sep 17 18:55:17.630 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 17 18:55:17.632 INFO kablam! warning: the feature `use_extern_macros` has been stable since 1.30.0 and no longer requires an attribute to enable
Sep 17 18:55:17.632 INFO kablam!  --> src/lib.rs:1:12
Sep 17 18:55:17.632 INFO kablam!   |
Sep 17 18:55:17.632 INFO kablam! 1 | #![feature(use_extern_macros)]
Sep 17 18:55:17.632 INFO kablam!   |            ^^^^^^^^^^^^^^^^^
Sep 17 18:55:17.632 INFO kablam!   |
Sep 17 18:55:17.632 INFO kablam!   = note: #[warn(stable_features)] on by default
Sep 17 18:55:17.632 INFO kablam! 
Sep 17 18:55:17.634 INFO kablam! error: Could not compile `rfcalcs`.
Sep 17 18:55:17.634 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 17 18:55:17.656 INFO kablam! error: build failed
Sep 17 18:55:17.657 INFO kablam! su: No module specific data is present
Sep 17 18:55:18.143 INFO running `"docker" "rm" "-f" "facb8ba285154756a11c7015aa6389fc92787c5869c787888d11495d83bf570a"`
Sep 17 18:55:18.217 INFO blam! facb8ba285154756a11c7015aa6389fc92787c5869c787888d11495d83bf570a