Aug 31 16:04:16.985 INFO checking rubrail-0.7.0 against master#d0d81b7fc1421859ba0218e8a437af29ae3b0967 for pr-53578
Aug 31 16:04:16.985 INFO running: cargo +d0d81b7fc1421859ba0218e8a437af29ae3b0967-alt check --frozen --all --all-targets
Aug 31 16:04:16.985 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53578/master#d0d81b7fc1421859ba0218e8a437af29ae3b0967:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578/worker-1/master#d0d81b7fc1421859ba0218e8a437af29ae3b0967:/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 +d0d81b7fc1421859ba0218e8a437af29ae3b0967-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 31 16:04:17.198 INFO blam! 3f3b6b02d4bb5c0a9cd8df620e693a35ff4d6907bff94c252dcee8d7d8a4499d
Aug 31 16:04:17.201 INFO running `"docker" "start" "-a" "3f3b6b02d4bb5c0a9cd8df620e693a35ff4d6907bff94c252dcee8d7d8a4499d"`
Aug 31 16:04:17.894 INFO kablam!    Compiling rubrail v0.7.0 (file:///source)
Aug 31 16:04:17.898 INFO kablam!     Checking log4rs v0.8.0
Aug 31 16:04:19.226 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 16:04:19.226 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/file.rs:25:3
Aug 31 16:04:19.226 INFO kablam!    |
Aug 31 16:04:19.226 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Aug 31 16:04:19.226 INFO kablam!    |   ^^^^^
Aug 31 16:04:19.226 INFO kablam!    |
Aug 31 16:04:19.226 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 16:04:19.226 INFO kablam! 
Aug 31 16:04:19.227 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 16:04:19.227 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/console.rs:24:3
Aug 31 16:04:19.227 INFO kablam!    |
Aug 31 16:04:19.227 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 31 16:04:19.227 INFO kablam!    |   ^^^^^
Aug 31 16:04:19.227 INFO kablam!    |
Aug 31 16:04:19.227 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 16:04:19.227 INFO kablam! 
Aug 31 16:04:19.228 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 16:04:19.228 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/roll/delete.rs:16:3
Aug 31 16:04:19.228 INFO kablam!    |
Aug 31 16:04:19.228 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Aug 31 16:04:19.228 INFO kablam!    |   ^^^^^
Aug 31 16:04:19.228 INFO kablam!    |
Aug 31 16:04:19.228 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 16:04:19.228 INFO kablam! 
Aug 31 16:04:19.228 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 16:04:19.228 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/roll/fixed_window.rs:17:3
Aug 31 16:04:19.228 INFO kablam!    |
Aug 31 16:04:19.228 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Aug 31 16:04:19.228 INFO kablam!    |   ^^^^^
Aug 31 16:04:19.228 INFO kablam!    |
Aug 31 16:04:19.228 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 16:04:19.228 INFO kablam! 
Aug 31 16:04:19.228 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 16:04:19.228 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/trigger/size.rs:21:3
Aug 31 16:04:19.228 INFO kablam!    |
Aug 31 16:04:19.228 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Aug 31 16:04:19.228 INFO kablam!    |   ^^^^^
Aug 31 16:04:19.228 INFO kablam!    |
Aug 31 16:04:19.228 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 16:04:19.228 INFO kablam! 
Aug 31 16:04:19.228 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 16:04:19.228 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Aug 31 16:04:19.228 INFO kablam!    |
Aug 31 16:04:19.228 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 31 16:04:19.228 INFO kablam!    |   ^^^^^
Aug 31 16:04:19.228 INFO kablam!    |
Aug 31 16:04:19.229 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 16:04:19.229 INFO kablam! 
Aug 31 16:04:19.230 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 16:04:19.231 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/mod.rs:46:3
Aug 31 16:04:19.231 INFO kablam!    |
Aug 31 16:04:19.231 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Aug 31 16:04:19.231 INFO kablam!    |   ^^^^^
Aug 31 16:04:19.231 INFO kablam!    |
Aug 31 16:04:19.231 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 16:04:19.231 INFO kablam! 
Aug 31 16:04:19.358 INFO kablam! error: aborting due to 7 previous errors
Aug 31 16:04:19.358 INFO kablam! 
Aug 31 16:04:19.358 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 31 16:04:19.373 INFO kablam! error: Could not compile `log4rs`.
Aug 31 16:04:19.373 INFO kablam! 
Aug 31 16:04:19.373 INFO kablam! To learn more, run the command again with --verbose.
Aug 31 16:04:19.374 INFO kablam! su: No module specific data is present
Aug 31 16:04:19.848 INFO running `"docker" "rm" "-f" "3f3b6b02d4bb5c0a9cd8df620e693a35ff4d6907bff94c252dcee8d7d8a4499d"`
Aug 31 16:04:19.998 INFO blam! 3f3b6b02d4bb5c0a9cd8df620e693a35ff4d6907bff94c252dcee8d7d8a4499d