Aug 30 05:07:07.631 INFO checking rubrail-0.5.0 against try#bc5a74802bb3ffc82f51ef04bca58d64220124c4 for pr-53699
Aug 30 05:07:07.631 INFO running: cargo +bc5a74802bb3ffc82f51ef04bca58d64220124c4-alt check --frozen --all --all-targets
Aug 30 05:07:07.632 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53699/try#bc5a74802bb3ffc82f51ef04bca58d64220124c4:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53699/worker-2/try#bc5a74802bb3ffc82f51ef04bca58d64220124c4:/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=500" "-e" "CMD=cargo +bc5a74802bb3ffc82f51ef04bca58d64220124c4-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 30 05:07:07.841 INFO blam! 321ab89ed791eeda6b227403daa712cccd3a0a01ae90cb1a68954bfa7c9d6525
Aug 30 05:07:07.843 INFO running `"docker" "start" "-a" "321ab89ed791eeda6b227403daa712cccd3a0a01ae90cb1a68954bfa7c9d6525"`
Aug 30 05:07:08.682 INFO kablam!    Compiling rubrail v0.5.0 (file:///source)
Aug 30 05:07:08.686 INFO kablam!     Checking yaml-rust v0.3.5
Aug 30 05:07:08.702 INFO kablam!     Checking ordered-float v0.4.0
Aug 30 05:07:09.880 INFO kablam!     Checking serde-value v0.4.1
Aug 30 05:07:11.088 INFO kablam!     Checking serde_yaml v0.6.2
Aug 30 05:07:13.195 INFO kablam!     Checking log4rs v0.6.3
Aug 30 05:07:14.658 INFO kablam! error[E0658]: The attribute `serde` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Aug 30 05:07:14.658 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/file.rs:25:3
Aug 30 05:07:14.658 INFO kablam!    |
Aug 30 05:07:14.658 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Aug 30 05:07:14.659 INFO kablam!    |   ^^^^^
Aug 30 05:07:14.659 INFO kablam!    |
Aug 30 05:07:14.659 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:07:14.659 INFO kablam! 
Aug 30 05:07:14.659 INFO kablam! error[E0658]: The attribute `serde` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Aug 30 05:07:14.659 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/console.rs:24:3
Aug 30 05:07:14.660 INFO kablam!    |
Aug 30 05:07:14.660 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 30 05:07:14.660 INFO kablam!    |   ^^^^^
Aug 30 05:07:14.660 INFO kablam!    |
Aug 30 05:07:14.660 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:07:14.660 INFO kablam! 
Aug 30 05:07:14.660 INFO kablam! error[E0658]: The attribute `serde` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Aug 30 05:07:14.660 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/rolling_file/policy/compound/roll/delete.rs:16:3
Aug 30 05:07:14.660 INFO kablam!    |
Aug 30 05:07:14.660 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Aug 30 05:07:14.660 INFO kablam!    |   ^^^^^
Aug 30 05:07:14.660 INFO kablam!    |
Aug 30 05:07:14.660 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:07:14.660 INFO kablam! 
Aug 30 05:07:14.660 INFO kablam! error[E0658]: The attribute `serde` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Aug 30 05:07:14.660 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/rolling_file/policy/compound/roll/fixed_window.rs:17:3
Aug 30 05:07:14.660 INFO kablam!    |
Aug 30 05:07:14.661 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Aug 30 05:07:14.661 INFO kablam!    |   ^^^^^
Aug 30 05:07:14.661 INFO kablam!    |
Aug 30 05:07:14.661 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:07:14.661 INFO kablam! 
Aug 30 05:07:14.661 INFO kablam! error[E0658]: The attribute `serde` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Aug 30 05:07:14.661 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/rolling_file/policy/compound/trigger/size.rs:21:3
Aug 30 05:07:14.661 INFO kablam!    |
Aug 30 05:07:14.661 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Aug 30 05:07:14.661 INFO kablam!    |   ^^^^^
Aug 30 05:07:14.661 INFO kablam!    |
Aug 30 05:07:14.661 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:07:14.661 INFO kablam! 
Aug 30 05:07:14.662 INFO kablam! error[E0658]: The attribute `serde` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Aug 30 05:07:14.662 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/rolling_file/policy/compound/mod.rs:24:3
Aug 30 05:07:14.662 INFO kablam!    |
Aug 30 05:07:14.662 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 30 05:07:14.662 INFO kablam!    |   ^^^^^
Aug 30 05:07:14.662 INFO kablam!    |
Aug 30 05:07:14.662 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:07:14.662 INFO kablam! 
Aug 30 05:07:14.662 INFO kablam! error[E0658]: The attribute `serde` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Aug 30 05:07:14.662 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/rolling_file/mod.rs:46:3
Aug 30 05:07:14.662 INFO kablam!    |
Aug 30 05:07:14.662 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Aug 30 05:07:14.662 INFO kablam!    |   ^^^^^
Aug 30 05:07:14.662 INFO kablam!    |
Aug 30 05:07:14.662 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:07:14.662 INFO kablam! 
Aug 30 05:07:14.722 INFO kablam! error: aborting due to 7 previous errors
Aug 30 05:07:14.723 INFO kablam! 
Aug 30 05:07:14.723 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 30 05:07:14.737 INFO kablam! error: Could not compile `log4rs`.
Aug 30 05:07:14.737 INFO kablam! 
Aug 30 05:07:14.737 INFO kablam! To learn more, run the command again with --verbose.
Aug 30 05:07:14.743 INFO kablam! su: No module specific data is present
Aug 30 05:07:15.243 INFO running `"docker" "rm" "-f" "321ab89ed791eeda6b227403daa712cccd3a0a01ae90cb1a68954bfa7c9d6525"`
Aug 30 05:07:15.395 INFO blam! 321ab89ed791eeda6b227403daa712cccd3a0a01ae90cb1a68954bfa7c9d6525