Sep 10 11:30:01.445 INFO checking rfcalcs-0.1.1 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 11:30:01.445 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 11:30:01.445 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54090/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-4/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/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 +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 11:30:01.615 INFO blam! acabdbd17ce68cfe9e6ba2c4c408626986d2d777230ce24293636f041630aad5
Sep 10 11:30:01.616 INFO running `"docker" "start" "-a" "acabdbd17ce68cfe9e6ba2c4c408626986d2d777230ce24293636f041630aad5"`
Sep 10 11:30:02.729 INFO kablam! usermod: no changes
Sep 10 11:30:02.766 INFO kablam!     Checking rfcalcs v0.1.1 (file:///source)
Sep 10 11:30:02.940 INFO kablam! warning: the feature `use_extern_macros` has been stable since 1.30.0 and no longer requires an attribute to enable
Sep 10 11:30:02.940 INFO kablam!  --> src/lib.rs:1:12
Sep 10 11:30:02.940 INFO kablam!   |
Sep 10 11:30:02.940 INFO kablam! 1 | #![feature(use_extern_macros)]
Sep 10 11:30:02.940 INFO kablam!   |            ^^^^^^^^^^^^^^^^^
Sep 10 11:30:02.940 INFO kablam!   |
Sep 10 11:30:02.940 INFO kablam!   = note: #[warn(stable_features)] on by default
Sep 10 11:30:02.940 INFO kablam! 
Sep 10 11:30:02.957 INFO kablam! error[E0658]: attributes on expressions are experimental. (see issue #15701)
Sep 10 11:30:02.957 INFO kablam!   --> src/lib.rs:33:9
Sep 10 11:30:02.957 INFO kablam!    |
Sep 10 11:30:02.957 INFO kablam! 33 |         /// Test against precalculated results
Sep 10 11:30:02.957 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 10 11:30:02.957 INFO kablam!    |
Sep 10 11:30:02.957 INFO kablam!    = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
Sep 10 11:30:02.957 INFO kablam!    = help: `///` is for documentation comments. For a plain comment, use `//`.
Sep 10 11:30:02.957 INFO kablam! 
Sep 10 11:30:02.959 INFO kablam! error: aborting due to previous error
Sep 10 11:30:02.959 INFO kablam! 
Sep 10 11:30:02.959 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 10 11:30:02.964 INFO kablam! error: Could not compile `rfcalcs`.
Sep 10 11:30:02.964 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 10 11:30:02.970 INFO kablam! error: build failed
Sep 10 11:30:02.971 INFO kablam! su: No module specific data is present
Sep 10 11:30:03.732 INFO running `"docker" "rm" "-f" "acabdbd17ce68cfe9e6ba2c4c408626986d2d777230ce24293636f041630aad5"`
Sep 10 11:30:03.864 INFO blam! acabdbd17ce68cfe9e6ba2c4c408626986d2d777230ce24293636f041630aad5