Sep 21 04:38:46.267 INFO checking rfcalcs-0.1.1 against try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6 for pr-54394
Sep 21 04:38:46.267 INFO running: cargo +f1a3f05968ed2a674e09b6efa4ad9df90816e2b6-alt check --frozen --all --all-targets
Sep 21 04:38:46.267 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-5/pr-54394/try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-5/try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6:/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 +f1a3f05968ed2a674e09b6efa4ad9df90816e2b6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 21 04:38:46.445 INFO blam! 2a0fb5ff4d0ffd2055ea4b896b0d15386fdeabef7a56432aca95c13591bc98eb
Sep 21 04:38:46.447 INFO running `"docker" "start" "-a" "2a0fb5ff4d0ffd2055ea4b896b0d15386fdeabef7a56432aca95c13591bc98eb"`
Sep 21 04:38:47.470 INFO kablam! usermod: no changes
Sep 21 04:38:47.511 INFO kablam!     Checking rfcalcs v0.1.1 (/source)
Sep 21 04:38:47.750 INFO kablam! error[E0658]: attributes on expressions are experimental. (see issue #15701)
Sep 21 04:38:47.750 INFO kablam!   --> src/lib.rs:33:9
Sep 21 04:38:47.750 INFO kablam!    |
Sep 21 04:38:47.750 INFO kablam! 33 |         /// Test against precalculated results
Sep 21 04:38:47.750 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 21 04:38:47.750 INFO kablam!    |
Sep 21 04:38:47.750 INFO kablam!    = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
Sep 21 04:38:47.750 INFO kablam!    = help: `///` is for documentation comments. For a plain comment, use `//`.
Sep 21 04:38:47.750 INFO kablam! 
Sep 21 04:38:47.750 INFO kablam! error: aborting due to previous error
Sep 21 04:38:47.750 INFO kablam! 
Sep 21 04:38:47.750 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 21 04:38:47.754 INFO kablam! warning: the feature `use_extern_macros` has been stable since 1.30.0 and no longer requires an attribute to enable
Sep 21 04:38:47.754 INFO kablam!  --> src/lib.rs:1:12
Sep 21 04:38:47.754 INFO kablam!   |
Sep 21 04:38:47.754 INFO kablam! 1 | #![feature(use_extern_macros)]
Sep 21 04:38:47.754 INFO kablam!   |            ^^^^^^^^^^^^^^^^^
Sep 21 04:38:47.754 INFO kablam!   |
Sep 21 04:38:47.754 INFO kablam!   = note: #[warn(stable_features)] on by default
Sep 21 04:38:47.754 INFO kablam! 
Sep 21 04:38:47.755 INFO kablam! error: Could not compile `rfcalcs`.
Sep 21 04:38:47.755 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 21 04:38:47.802 INFO kablam! error: build failed
Sep 21 04:38:47.804 INFO kablam! su: No module specific data is present
Sep 21 04:38:48.501 INFO running `"docker" "rm" "-f" "2a0fb5ff4d0ffd2055ea4b896b0d15386fdeabef7a56432aca95c13591bc98eb"`
Sep 21 04:38:48.600 INFO blam! 2a0fb5ff4d0ffd2055ea4b896b0d15386fdeabef7a56432aca95c13591bc98eb