Aug 30 05:43:09.925 INFO checking rubrail-0.5.0 against master#ede55518431154bc761f7b2438cce9078c162700 for pr-53707
Aug 30 05:43:09.925 INFO running: cargo +ede55518431154bc761f7b2438cce9078c162700-alt check --frozen --all --all-targets
Aug 30 05:43:09.925 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53707/master#ede55518431154bc761f7b2438cce9078c162700:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53707/worker-0/master#ede55518431154bc761f7b2438cce9078c162700:/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 +ede55518431154bc761f7b2438cce9078c162700-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 30 05:43:10.082 INFO blam! b227895c1c6d46fe9e9a9b240de764fc236c4c283c8a45ee81a0118dc559bd19
Aug 30 05:43:10.084 INFO running `"docker" "start" "-a" "b227895c1c6d46fe9e9a9b240de764fc236c4c283c8a45ee81a0118dc559bd19"`
Aug 30 05:43:10.751 INFO kablam!    Compiling rubrail v0.5.0 (file:///source)
Aug 30 05:43:10.752 INFO kablam!     Checking serde_yaml v0.6.2
Aug 30 05:43:10.753 INFO kablam!     Checking ordered-float v0.4.0
Aug 30 05:43:11.596 INFO kablam!     Checking serde-value v0.4.1
Aug 30 05:43:12.689 INFO kablam!     Checking log4rs v0.6.3
Aug 30 05:43:13.777 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 05:43:13.777 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/file.rs:25:3
Aug 30 05:43:13.777 INFO kablam!    |
Aug 30 05:43:13.777 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Aug 30 05:43:13.777 INFO kablam!    |   ^^^^^
Aug 30 05:43:13.777 INFO kablam!    |
Aug 30 05:43:13.777 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:43:13.777 INFO kablam! 
Aug 30 05:43:13.778 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 05:43:13.779 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/console.rs:24:3
Aug 30 05:43:13.779 INFO kablam!    |
Aug 30 05:43:13.779 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 30 05:43:13.779 INFO kablam!    |   ^^^^^
Aug 30 05:43:13.779 INFO kablam!    |
Aug 30 05:43:13.779 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:43:13.779 INFO kablam! 
Aug 30 05:43:13.779 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 05:43:13.779 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 05:43:13.779 INFO kablam!    |
Aug 30 05:43:13.779 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Aug 30 05:43:13.779 INFO kablam!    |   ^^^^^
Aug 30 05:43:13.779 INFO kablam!    |
Aug 30 05:43:13.779 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:43:13.779 INFO kablam! 
Aug 30 05:43:13.779 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 05:43:13.779 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 05:43:13.779 INFO kablam!    |
Aug 30 05:43:13.779 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Aug 30 05:43:13.779 INFO kablam!    |   ^^^^^
Aug 30 05:43:13.779 INFO kablam!    |
Aug 30 05:43:13.779 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:43:13.779 INFO kablam! 
Aug 30 05:43:13.779 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 05:43:13.779 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 05:43:13.779 INFO kablam!    |
Aug 30 05:43:13.779 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Aug 30 05:43:13.780 INFO kablam!    |   ^^^^^
Aug 30 05:43:13.780 INFO kablam!    |
Aug 30 05:43:13.780 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:43:13.780 INFO kablam! 
Aug 30 05:43:13.780 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 05:43:13.780 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 05:43:13.780 INFO kablam!    |
Aug 30 05:43:13.780 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 30 05:43:13.780 INFO kablam!    |   ^^^^^
Aug 30 05:43:13.780 INFO kablam!    |
Aug 30 05:43:13.780 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:43:13.780 INFO kablam! 
Aug 30 05:43:13.780 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 05:43:13.780 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/rolling_file/mod.rs:46:3
Aug 30 05:43:13.781 INFO kablam!    |
Aug 30 05:43:13.781 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Aug 30 05:43:13.781 INFO kablam!    |   ^^^^^
Aug 30 05:43:13.781 INFO kablam!    |
Aug 30 05:43:13.781 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 05:43:13.781 INFO kablam! 
Aug 30 05:43:13.819 INFO kablam! error: aborting due to 7 previous errors
Aug 30 05:43:13.819 INFO kablam! 
Aug 30 05:43:13.819 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 30 05:43:13.828 INFO kablam! error: Could not compile `log4rs`.
Aug 30 05:43:13.828 INFO kablam! 
Aug 30 05:43:13.828 INFO kablam! To learn more, run the command again with --verbose.
Aug 30 05:43:13.830 INFO kablam! su: No module specific data is present
Aug 30 05:43:14.414 INFO running `"docker" "rm" "-f" "b227895c1c6d46fe9e9a9b240de764fc236c4c283c8a45ee81a0118dc559bd19"`
Aug 30 05:43:14.541 INFO blam! b227895c1c6d46fe9e9a9b240de764fc236c4c283c8a45ee81a0118dc559bd19