Sep 06 01:28:14.553 INFO checking rfcalcs-0.1.1 against master#1c2e17f4e3a2070a7f703f51e29c1c388ef703b6 for pr-53854
Sep 06 01:28:14.553 INFO running: cargo +1c2e17f4e3a2070a7f703f51e29c1c388ef703b6-alt check --frozen --all --all-targets
Sep 06 01:28:14.553 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-5/pr-53854/master#1c2e17f4e3a2070a7f703f51e29c1c388ef703b6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-5/master#1c2e17f4e3a2070a7f703f51e29c1c388ef703b6:/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 +1c2e17f4e3a2070a7f703f51e29c1c388ef703b6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 06 01:28:14.726 INFO blam! 09a613061a74ffd042e94877d2fdb3103b81d6a2f14e934deeb307fa890f865a
Sep 06 01:28:14.729 INFO running `"docker" "start" "-a" "09a613061a74ffd042e94877d2fdb3103b81d6a2f14e934deeb307fa890f865a"`
Sep 06 01:28:15.502 INFO kablam! usermod: no changes
Sep 06 01:28:15.542 INFO kablam!     Checking assert_approx_eq v1.0.0
Sep 06 01:28:15.732 INFO kablam!     Checking rfcalcs v0.1.1 (file:///source)
Sep 06 01:28:15.769 INFO kablam! error[E0658]: attributes on expressions are experimental. (see issue #15701)
Sep 06 01:28:15.769 INFO kablam!   --> src/lib.rs:33:9
Sep 06 01:28:15.769 INFO kablam!    |
Sep 06 01:28:15.769 INFO kablam! 33 |         /// Test against precalculated results
Sep 06 01:28:15.769 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 06 01:28:15.769 INFO kablam!    |
Sep 06 01:28:15.769 INFO kablam!    = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
Sep 06 01:28:15.769 INFO kablam!    = help: `///` is for documentation comments. For a plain comment, use `//`.
Sep 06 01:28:15.769 INFO kablam! 
Sep 06 01:28:15.897 INFO kablam! error: aborting due to previous error
Sep 06 01:28:15.897 INFO kablam! 
Sep 06 01:28:15.897 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 06 01:28:15.902 INFO kablam! error: Could not compile `rfcalcs`.
Sep 06 01:28:15.902 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 06 01:28:15.919 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 01:28:15.919 INFO kablam!  --> src/lib.rs:1:12
Sep 06 01:28:15.919 INFO kablam!   |
Sep 06 01:28:15.919 INFO kablam! 1 | #![feature(use_extern_macros)]
Sep 06 01:28:15.919 INFO kablam!   |            ^^^^^^^^^^^^^^^^^
Sep 06 01:28:15.919 INFO kablam!   |
Sep 06 01:28:15.919 INFO kablam!   = note: #[warn(stable_features)] on by default
Sep 06 01:28:15.919 INFO kablam! 
Sep 06 01:28:15.942 INFO kablam! error: build failed
Sep 06 01:28:15.943 INFO kablam! su: No module specific data is present
Sep 06 01:28:16.736 INFO running `"docker" "rm" "-f" "09a613061a74ffd042e94877d2fdb3103b81d6a2f14e934deeb307fa890f865a"`
Sep 06 01:28:16.831 INFO blam! 09a613061a74ffd042e94877d2fdb3103b81d6a2f14e934deeb307fa890f865a