Aug 31 16:04:20.044 INFO checking rubrail-0.5.0 against try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b for pr-53578
Aug 31 16:04:20.044 INFO running: cargo +a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b-alt check --frozen --all --all-targets
Aug 31 16:04:20.044 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53578/try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578/worker-1/try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b:/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 +a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 31 16:04:20.281 INFO blam! f2f9725a619badcee8a41962e74d27d48aac48bac92982453a84b93bb9e5d540
Aug 31 16:04:20.284 INFO running `"docker" "start" "-a" "f2f9725a619badcee8a41962e74d27d48aac48bac92982453a84b93bb9e5d540"`
Aug 31 16:04:21.335 INFO kablam!    Compiling rubrail v0.5.0 (file:///source)
Aug 31 16:04:21.340 INFO kablam!     Checking serde_yaml v0.6.2
Aug 31 16:04:23.654 INFO kablam!     Checking log4rs v0.6.3
Aug 31 16:04:25.135 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 31 16:04:25.135 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/file.rs:25:3
Aug 31 16:04:25.135 INFO kablam!    |
Aug 31 16:04:25.135 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Aug 31 16:04:25.135 INFO kablam!    |   ^^^^^
Aug 31 16:04:25.135 INFO kablam!    |
Aug 31 16:04:25.136 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 16:04:25.136 INFO kablam! 
Aug 31 16:04:25.137 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 31 16:04:25.137 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/console.rs:24:3
Aug 31 16:04:25.137 INFO kablam!    |
Aug 31 16:04:25.137 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 31 16:04:25.137 INFO kablam!    |   ^^^^^
Aug 31 16:04:25.138 INFO kablam!    |
Aug 31 16:04:25.138 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 16:04:25.138 INFO kablam! 
Aug 31 16:04:25.138 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 31 16:04:25.138 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 31 16:04:25.138 INFO kablam!    |
Aug 31 16:04:25.138 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Aug 31 16:04:25.138 INFO kablam!    |   ^^^^^
Aug 31 16:04:25.138 INFO kablam!    |
Aug 31 16:04:25.138 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 16:04:25.138 INFO kablam! 
Aug 31 16:04:25.138 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 31 16:04:25.138 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 31 16:04:25.138 INFO kablam!    |
Aug 31 16:04:25.138 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Aug 31 16:04:25.138 INFO kablam!    |   ^^^^^
Aug 31 16:04:25.138 INFO kablam!    |
Aug 31 16:04:25.138 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 16:04:25.138 INFO kablam! 
Aug 31 16:04:25.139 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 31 16:04:25.139 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 31 16:04:25.139 INFO kablam!    |
Aug 31 16:04:25.139 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Aug 31 16:04:25.139 INFO kablam!    |   ^^^^^
Aug 31 16:04:25.139 INFO kablam!    |
Aug 31 16:04:25.139 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 16:04:25.139 INFO kablam! 
Aug 31 16:04:25.140 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 31 16:04:25.140 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/rolling_file/policy/compound/mod.rs:24:3
Aug 31 16:04:25.140 INFO kablam!    |
Aug 31 16:04:25.140 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 31 16:04:25.140 INFO kablam!    |   ^^^^^
Aug 31 16:04:25.141 INFO kablam!    |
Aug 31 16:04:25.141 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 16:04:25.141 INFO kablam! 
Aug 31 16:04:25.141 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 31 16:04:25.141 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/rolling_file/mod.rs:46:3
Aug 31 16:04:25.141 INFO kablam!    |
Aug 31 16:04:25.141 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Aug 31 16:04:25.141 INFO kablam!    |   ^^^^^
Aug 31 16:04:25.141 INFO kablam!    |
Aug 31 16:04:25.141 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 16:04:25.141 INFO kablam! 
Aug 31 16:04:25.197 INFO kablam! error: aborting due to 7 previous errors
Aug 31 16:04:25.197 INFO kablam! 
Aug 31 16:04:25.198 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 31 16:04:25.213 INFO kablam! error: Could not compile `log4rs`.
Aug 31 16:04:25.213 INFO kablam! 
Aug 31 16:04:25.213 INFO kablam! To learn more, run the command again with --verbose.
Aug 31 16:04:25.215 INFO kablam! su: No module specific data is present
Aug 31 16:04:25.668 INFO running `"docker" "rm" "-f" "f2f9725a619badcee8a41962e74d27d48aac48bac92982453a84b93bb9e5d540"`
Aug 31 16:04:25.818 INFO blam! f2f9725a619badcee8a41962e74d27d48aac48bac92982453a84b93bb9e5d540