Aug 30 05:43:09.335 INFO checking rubrail-0.5.0 against try#2d477f9981361618ac78253c28051a66b6cea125 for pr-53707
Aug 30 05:43:09.335 INFO running: cargo +2d477f9981361618ac78253c28051a66b6cea125-alt check --frozen --all --all-targets
Aug 30 05:43:09.335 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53707/try#2d477f9981361618ac78253c28051a66b6cea125:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53707/worker-1/try#2d477f9981361618ac78253c28051a66b6cea125:/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 +2d477f9981361618ac78253c28051a66b6cea125-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 30 05:43:09.502 INFO blam! d5151f544eceec09069aba3cb1970560f3bf91c21fa4c5cff123cb1ec44f68d4
Aug 30 05:43:09.504 INFO running `"docker" "start" "-a" "d5151f544eceec09069aba3cb1970560f3bf91c21fa4c5cff123cb1ec44f68d4"`
Aug 30 05:43:10.364 INFO kablam!    Compiling rubrail v0.5.0 (file:///source)
Aug 30 05:43:10.364 INFO kablam!     Checking log4rs v0.6.3
Aug 30 05:43:11.450 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 05:43:11.450 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/file.rs:25:3
Aug 30 05:43:11.450 INFO kablam!    |
Aug 30 05:43:11.450 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Aug 30 05:43:11.451 INFO kablam!    |   ^^^^^
Aug 30 05:43:11.451 INFO kablam!    |
Aug 30 05:43:11.451 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:43:11.451 INFO kablam! 
Aug 30 05:43:11.451 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 05:43:11.451 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/console.rs:24:3
Aug 30 05:43:11.452 INFO kablam!    |
Aug 30 05:43:11.452 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 30 05:43:11.452 INFO kablam!    |   ^^^^^
Aug 30 05:43:11.452 INFO kablam!    |
Aug 30 05:43:11.452 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:43:11.452 INFO kablam! 
Aug 30 05:43:11.452 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 05:43:11.452 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 05:43:11.452 INFO kablam!    |
Aug 30 05:43:11.452 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Aug 30 05:43:11.452 INFO kablam!    |   ^^^^^
Aug 30 05:43:11.452 INFO kablam!    |
Aug 30 05:43:11.452 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:43:11.452 INFO kablam! 
Aug 30 05:43:11.452 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 05:43:11.452 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 05:43:11.452 INFO kablam!    |
Aug 30 05:43:11.452 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Aug 30 05:43:11.452 INFO kablam!    |   ^^^^^
Aug 30 05:43:11.452 INFO kablam!    |
Aug 30 05:43:11.452 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:43:11.452 INFO kablam! 
Aug 30 05:43:11.452 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 05:43:11.452 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 05:43:11.452 INFO kablam!    |
Aug 30 05:43:11.452 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Aug 30 05:43:11.452 INFO kablam!    |   ^^^^^
Aug 30 05:43:11.452 INFO kablam!    |
Aug 30 05:43:11.452 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:43:11.452 INFO kablam! 
Aug 30 05:43:11.453 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 05:43:11.453 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 05:43:11.453 INFO kablam!    |
Aug 30 05:43:11.453 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 30 05:43:11.453 INFO kablam!    |   ^^^^^
Aug 30 05:43:11.453 INFO kablam!    |
Aug 30 05:43:11.453 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:43:11.453 INFO kablam! 
Aug 30 05:43:11.453 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 05:43:11.453 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/rolling_file/mod.rs:46:3
Aug 30 05:43:11.453 INFO kablam!    |
Aug 30 05:43:11.453 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Aug 30 05:43:11.453 INFO kablam!    |   ^^^^^
Aug 30 05:43:11.453 INFO kablam!    |
Aug 30 05:43:11.453 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:43:11.453 INFO kablam! 
Aug 30 05:43:11.492 INFO kablam! error: aborting due to 7 previous errors
Aug 30 05:43:11.492 INFO kablam! 
Aug 30 05:43:11.492 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 30 05:43:11.503 INFO kablam! error: Could not compile `log4rs`.
Aug 30 05:43:11.503 INFO kablam! 
Aug 30 05:43:11.503 INFO kablam! To learn more, run the command again with --verbose.
Aug 30 05:43:11.504 INFO kablam! su: No module specific data is present
Aug 30 05:43:11.978 INFO running `"docker" "rm" "-f" "d5151f544eceec09069aba3cb1970560f3bf91c21fa4c5cff123cb1ec44f68d4"`
Aug 30 05:43:12.089 INFO blam! d5151f544eceec09069aba3cb1970560f3bf91c21fa4c5cff123cb1ec44f68d4