Sep 06 01:28:14.376 INFO checking rfcalcs-0.1.1 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 06 01:28:14.376 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 06 01:28:14.376 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-4/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/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 +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 06 01:28:14.482 INFO blam! 95e56a1a1e5640d349a0d06f1ad41df871b1469afec81d24b3c8f3c4bb03f060
Sep 06 01:28:14.484 INFO running `"docker" "start" "-a" "95e56a1a1e5640d349a0d06f1ad41df871b1469afec81d24b3c8f3c4bb03f060"`
Sep 06 01:28:15.246 INFO kablam! usermod: no changes
Sep 06 01:28:15.270 INFO kablam!     Checking assert_approx_eq v1.0.0
Sep 06 01:28:15.469 INFO kablam!     Checking rfcalcs v0.1.1 (file:///source)
Sep 06 01:28:15.517 INFO kablam! error[E0658]: attributes on expressions are experimental. (see issue #15701)
Sep 06 01:28:15.517 INFO kablam!   --> src/lib.rs:33:9
Sep 06 01:28:15.517 INFO kablam!    |
Sep 06 01:28:15.517 INFO kablam! 33 |         /// Test against precalculated results
Sep 06 01:28:15.517 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 06 01:28:15.517 INFO kablam!    |
Sep 06 01:28:15.517 INFO kablam!    = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
Sep 06 01:28:15.517 INFO kablam!    = help: `///` is for documentation comments. For a plain comment, use `//`.
Sep 06 01:28:15.517 INFO kablam! 
Sep 06 01:28:15.650 INFO kablam! error: aborting due to previous error
Sep 06 01:28:15.650 INFO kablam! 
Sep 06 01:28:15.650 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 06 01:28:15.662 INFO kablam! error: Could not compile `rfcalcs`.
Sep 06 01:28:15.662 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 06 01:28:15.662 INFO kablam! warning: the feature `use_extern_macros` has been stable since 1.30.0 and no longer requires an attribute to enable
Sep 06 01:28:15.662 INFO kablam!  --> src/lib.rs:1:12
Sep 06 01:28:15.662 INFO kablam!   |
Sep 06 01:28:15.662 INFO kablam! 1 | #![feature(use_extern_macros)]
Sep 06 01:28:15.662 INFO kablam!   |            ^^^^^^^^^^^^^^^^^
Sep 06 01:28:15.662 INFO kablam!   |
Sep 06 01:28:15.662 INFO kablam!   = note: #[warn(stable_features)] on by default
Sep 06 01:28:15.662 INFO kablam! 
Sep 06 01:28:15.685 INFO kablam! error: build failed
Sep 06 01:28:15.688 INFO kablam! su: No module specific data is present
Sep 06 01:28:16.456 INFO running `"docker" "rm" "-f" "95e56a1a1e5640d349a0d06f1ad41df871b1469afec81d24b3c8f3c4bb03f060"`
Sep 06 01:28:16.529 INFO blam! 95e56a1a1e5640d349a0d06f1ad41df871b1469afec81d24b3c8f3c4bb03f060