Aug 30 08:47:36.286 INFO checking parsec-0.5.0 against try#2d477f9981361618ac78253c28051a66b6cea125 for pr-53707
Aug 30 08:47:36.286 INFO running: cargo +2d477f9981361618ac78253c28051a66b6cea125-alt check --frozen --all --all-targets
Aug 30 08:47:36.286 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53707/try#2d477f9981361618ac78253c28051a66b6cea125:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53707/worker-2/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 08:47:36.527 INFO blam! f1c83758b69fbaa0702072d8fd07613f1ed4087f5cc126bfd3bb0374562cc296
Aug 30 08:47:36.529 INFO running `"docker" "start" "-a" "f1c83758b69fbaa0702072d8fd07613f1ed4087f5cc126bfd3bb0374562cc296"`
Aug 30 08:47:37.442 INFO kablam!     Checking log4rs v0.7.0
Aug 30 08:47:38.717 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 08:47:38.718 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/file.rs:25:3
Aug 30 08:47:38.718 INFO kablam!    |
Aug 30 08:47:38.718 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Aug 30 08:47:38.718 INFO kablam!    |   ^^^^^
Aug 30 08:47:38.718 INFO kablam!    |
Aug 30 08:47:38.718 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 08:47:38.718 INFO kablam! 
Aug 30 08:47:38.719 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 08:47:38.719 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/console.rs:24:3
Aug 30 08:47:38.719 INFO kablam!    |
Aug 30 08:47:38.719 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 30 08:47:38.719 INFO kablam!    |   ^^^^^
Aug 30 08:47:38.719 INFO kablam!    |
Aug 30 08:47:38.719 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 08:47:38.719 INFO kablam! 
Aug 30 08:47:38.719 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 08:47:38.720 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/roll/delete.rs:16:3
Aug 30 08:47:38.720 INFO kablam!    |
Aug 30 08:47:38.720 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Aug 30 08:47:38.720 INFO kablam!    |   ^^^^^
Aug 30 08:47:38.720 INFO kablam!    |
Aug 30 08:47:38.720 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 08:47:38.720 INFO kablam! 
Aug 30 08:47:38.721 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 08:47:38.721 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/roll/fixed_window.rs:17:3
Aug 30 08:47:38.721 INFO kablam!    |
Aug 30 08:47:38.721 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Aug 30 08:47:38.721 INFO kablam!    |   ^^^^^
Aug 30 08:47:38.721 INFO kablam!    |
Aug 30 08:47:38.721 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 08:47:38.721 INFO kablam! 
Aug 30 08:47:38.721 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 08:47:38.721 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/trigger/size.rs:21:3
Aug 30 08:47:38.721 INFO kablam!    |
Aug 30 08:47:38.721 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Aug 30 08:47:38.721 INFO kablam!    |   ^^^^^
Aug 30 08:47:38.721 INFO kablam!    |
Aug 30 08:47:38.721 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 08:47:38.721 INFO kablam! 
Aug 30 08:47:38.721 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 08:47:38.721 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Aug 30 08:47:38.722 INFO kablam!    |
Aug 30 08:47:38.722 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 30 08:47:38.722 INFO kablam!    |   ^^^^^
Aug 30 08:47:38.722 INFO kablam!    |
Aug 30 08:47:38.722 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 08:47:38.722 INFO kablam! 
Aug 30 08:47:38.722 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 08:47:38.722 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/mod.rs:46:3
Aug 30 08:47:38.722 INFO kablam!    |
Aug 30 08:47:38.722 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Aug 30 08:47:38.722 INFO kablam!    |   ^^^^^
Aug 30 08:47:38.722 INFO kablam!    |
Aug 30 08:47:38.722 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 08:47:38.722 INFO kablam! 
Aug 30 08:47:38.835 INFO kablam! error: aborting due to 7 previous errors
Aug 30 08:47:38.835 INFO kablam! 
Aug 30 08:47:38.835 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 30 08:47:38.850 INFO kablam! error: Could not compile `log4rs`.
Aug 30 08:47:38.851 INFO kablam! 
Aug 30 08:47:38.851 INFO kablam! To learn more, run the command again with --verbose.
Aug 30 08:47:38.853 INFO kablam! su: No module specific data is present
Aug 30 08:47:39.322 INFO running `"docker" "rm" "-f" "f1c83758b69fbaa0702072d8fd07613f1ed4087f5cc126bfd3bb0374562cc296"`
Aug 30 08:47:39.428 INFO blam! f1c83758b69fbaa0702072d8fd07613f1ed4087f5cc126bfd3bb0374562cc296