Sep 01 14:53:11.893 INFO checking log4rs-fluentd-0.2.0 against try#aa245a5862056b681d2ccdb178f58891108cd3a6 for pr-53831
Sep 01 14:53:11.893 INFO running: cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets
Sep 01 14:53:11.893 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53831/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-2/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/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 +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 14:53:12.034 INFO blam! 59bdbdbb1f370c178dd5ed91b6b59bfa3682fd1c3aa152ad131b9ad1ca8cb5d6
Sep 01 14:53:12.036 INFO running `"docker" "start" "-a" "59bdbdbb1f370c178dd5ed91b6b59bfa3682fd1c3aa152ad131b9ad1ca8cb5d6"`
Sep 01 14:53:12.708 INFO kablam!     Checking poston v0.1.6
Sep 01 14:53:12.708 INFO kablam!     Checking log4rs v0.8.0
Sep 01 14:53:14.443 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 01 14:53:14.443 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/file.rs:25:3
Sep 01 14:53:14.443 INFO kablam!    |
Sep 01 14:53:14.443 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 01 14:53:14.443 INFO kablam!    |   ^^^^^
Sep 01 14:53:14.443 INFO kablam!    |
Sep 01 14:53:14.443 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 14:53:14.443 INFO kablam! 
Sep 01 14:53:14.444 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 01 14:53:14.444 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/console.rs:24:3
Sep 01 14:53:14.444 INFO kablam!    |
Sep 01 14:53:14.444 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 14:53:14.445 INFO kablam!    |   ^^^^^
Sep 01 14:53:14.445 INFO kablam!    |
Sep 01 14:53:14.445 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 14:53:14.445 INFO kablam! 
Sep 01 14:53:14.445 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 01 14:53:14.445 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 01 14:53:14.445 INFO kablam!    |
Sep 01 14:53:14.445 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 01 14:53:14.445 INFO kablam!    |   ^^^^^
Sep 01 14:53:14.445 INFO kablam!    |
Sep 01 14:53:14.445 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 14:53:14.445 INFO kablam! 
Sep 01 14:53:14.445 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 01 14:53:14.445 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 01 14:53:14.445 INFO kablam!    |
Sep 01 14:53:14.445 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 01 14:53:14.445 INFO kablam!    |   ^^^^^
Sep 01 14:53:14.445 INFO kablam!    |
Sep 01 14:53:14.445 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 14:53:14.445 INFO kablam! 
Sep 01 14:53:14.445 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 01 14:53:14.445 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 01 14:53:14.445 INFO kablam!    |
Sep 01 14:53:14.445 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 01 14:53:14.445 INFO kablam!    |   ^^^^^
Sep 01 14:53:14.445 INFO kablam!    |
Sep 01 14:53:14.445 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 14:53:14.445 INFO kablam! 
Sep 01 14:53:14.446 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 01 14:53:14.446 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 01 14:53:14.446 INFO kablam!    |
Sep 01 14:53:14.446 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 14:53:14.446 INFO kablam!    |   ^^^^^
Sep 01 14:53:14.446 INFO kablam!    |
Sep 01 14:53:14.446 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 14:53:14.446 INFO kablam! 
Sep 01 14:53:14.447 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 01 14:53:14.447 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/mod.rs:46:3
Sep 01 14:53:14.447 INFO kablam!    |
Sep 01 14:53:14.447 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 01 14:53:14.447 INFO kablam!    |   ^^^^^
Sep 01 14:53:14.448 INFO kablam!    |
Sep 01 14:53:14.448 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 14:53:14.448 INFO kablam! 
Sep 01 14:53:14.528 INFO kablam! error: aborting due to 7 previous errors
Sep 01 14:53:14.528 INFO kablam! 
Sep 01 14:53:14.528 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 01 14:53:14.538 INFO kablam! error: Could not compile `log4rs`.
Sep 01 14:53:14.538 INFO kablam! 
Sep 01 14:53:14.538 INFO kablam! To learn more, run the command again with --verbose.
Sep 01 14:53:14.539 INFO kablam! su: No module specific data is present
Sep 01 14:53:15.034 INFO running `"docker" "rm" "-f" "59bdbdbb1f370c178dd5ed91b6b59bfa3682fd1c3aa152ad131b9ad1ca8cb5d6"`
Sep 01 14:53:15.162 INFO blam! 59bdbdbb1f370c178dd5ed91b6b59bfa3682fd1c3aa152ad131b9ad1ca8cb5d6