Sep 04 11:47:49.872 INFO checking log4rs-fluentd-0.2.0 against master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c for pr-53893
Sep 04 11:47:49.872 INFO running: cargo +28bcffead74d5e17c6cb1f7de432e37f93a6b50c-alt check --frozen --all --all-targets
Sep 04 11:47:49.872 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53893/master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53893/worker-2/master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c:/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 +28bcffead74d5e17c6cb1f7de432e37f93a6b50c-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 11:47:50.032 INFO blam! 2abf8a8ae301efa01ad71941732ddf79b1d7452c6b110370f3d3883dde0c354d
Sep 04 11:47:50.034 INFO running `"docker" "start" "-a" "2abf8a8ae301efa01ad71941732ddf79b1d7452c6b110370f3d3883dde0c354d"`
Sep 04 11:47:50.741 INFO kablam!     Checking poston v0.1.6
Sep 04 11:47:50.742 INFO kablam!     Checking log4rs v0.8.0
Sep 04 11:47:52.491 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)
Sep 04 11:47:52.491 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/file.rs:25:3
Sep 04 11:47:52.491 INFO kablam!    |
Sep 04 11:47:52.491 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 04 11:47:52.491 INFO kablam!    |   ^^^^^
Sep 04 11:47:52.491 INFO kablam!    |
Sep 04 11:47:52.491 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 11:47:52.491 INFO kablam! 
Sep 04 11:47:52.491 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)
Sep 04 11:47:52.491 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/console.rs:24:3
Sep 04 11:47:52.491 INFO kablam!    |
Sep 04 11:47:52.491 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 04 11:47:52.491 INFO kablam!    |   ^^^^^
Sep 04 11:47:52.491 INFO kablam!    |
Sep 04 11:47:52.491 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 11:47:52.491 INFO kablam! 
Sep 04 11:47:52.492 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)
Sep 04 11:47:52.492 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/roll/delete.rs:16:3
Sep 04 11:47:52.492 INFO kablam!    |
Sep 04 11:47:52.492 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 04 11:47:52.492 INFO kablam!    |   ^^^^^
Sep 04 11:47:52.492 INFO kablam!    |
Sep 04 11:47:52.492 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 11:47:52.492 INFO kablam! 
Sep 04 11:47:52.492 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)
Sep 04 11:47:52.492 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
Sep 04 11:47:52.492 INFO kablam!    |
Sep 04 11:47:52.492 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 04 11:47:52.492 INFO kablam!    |   ^^^^^
Sep 04 11:47:52.492 INFO kablam!    |
Sep 04 11:47:52.492 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 11:47:52.492 INFO kablam! 
Sep 04 11:47:52.492 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)
Sep 04 11:47:52.492 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/trigger/size.rs:21:3
Sep 04 11:47:52.492 INFO kablam!    |
Sep 04 11:47:52.492 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 04 11:47:52.492 INFO kablam!    |   ^^^^^
Sep 04 11:47:52.492 INFO kablam!    |
Sep 04 11:47:52.493 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 11:47:52.493 INFO kablam! 
Sep 04 11:47:52.493 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)
Sep 04 11:47:52.493 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 04 11:47:52.493 INFO kablam!    |
Sep 04 11:47:52.493 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 04 11:47:52.493 INFO kablam!    |   ^^^^^
Sep 04 11:47:52.493 INFO kablam!    |
Sep 04 11:47:52.493 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 11:47:52.493 INFO kablam! 
Sep 04 11:47:52.493 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)
Sep 04 11:47:52.493 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/mod.rs:46:3
Sep 04 11:47:52.493 INFO kablam!    |
Sep 04 11:47:52.493 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 04 11:47:52.493 INFO kablam!    |   ^^^^^
Sep 04 11:47:52.493 INFO kablam!    |
Sep 04 11:47:52.493 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 11:47:52.493 INFO kablam! 
Sep 04 11:47:52.592 INFO kablam! error: aborting due to 7 previous errors
Sep 04 11:47:52.592 INFO kablam! 
Sep 04 11:47:52.592 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 04 11:47:52.606 INFO kablam! error: Could not compile `log4rs`.
Sep 04 11:47:52.606 INFO kablam! 
Sep 04 11:47:52.606 INFO kablam! To learn more, run the command again with --verbose.
Sep 04 11:47:52.608 INFO kablam! su: No module specific data is present
Sep 04 11:47:53.099 INFO running `"docker" "rm" "-f" "2abf8a8ae301efa01ad71941732ddf79b1d7452c6b110370f3d3883dde0c354d"`
Sep 04 11:47:53.234 INFO blam! 2abf8a8ae301efa01ad71941732ddf79b1d7452c6b110370f3d3883dde0c354d