Aug 31 00:40:35.935 INFO checking amqpr-api-0.4.1 against try#2d477f9981361618ac78253c28051a66b6cea125 for pr-53707
Aug 31 00:40:35.935 INFO running: cargo +2d477f9981361618ac78253c28051a66b6cea125-alt check --frozen --all --all-targets
Aug 31 00:40:35.935 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53707/try#2d477f9981361618ac78253c28051a66b6cea125:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53707/worker-3/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 31 00:40:36.178 INFO blam! 7a200dcf96c413ce3bf32fb8cade0dc3e25d190a014f953e362062c003039230
Aug 31 00:40:36.180 INFO running `"docker" "start" "-a" "7a200dcf96c413ce3bf32fb8cade0dc3e25d190a014f953e362062c003039230"`
Aug 31 00:40:37.183 INFO kablam!     Checking amqpr-codec v0.3.2
Aug 31 00:40:37.183 INFO kablam!     Checking log4rs v0.7.0
Aug 31 00:40:39.593 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 00:40:39.593 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/file.rs:25:3
Aug 31 00:40:39.593 INFO kablam!    |
Aug 31 00:40:39.593 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Aug 31 00:40:39.593 INFO kablam!    |   ^^^^^
Aug 31 00:40:39.594 INFO kablam!    |
Aug 31 00:40:39.594 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 00:40:39.594 INFO kablam! 
Aug 31 00:40:39.595 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 00:40:39.595 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/console.rs:24:3
Aug 31 00:40:39.595 INFO kablam!    |
Aug 31 00:40:39.595 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 31 00:40:39.595 INFO kablam!    |   ^^^^^
Aug 31 00:40:39.596 INFO kablam!    |
Aug 31 00:40:39.596 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 00:40:39.596 INFO kablam! 
Aug 31 00:40:39.597 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 00:40:39.597 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 31 00:40:39.597 INFO kablam!    |
Aug 31 00:40:39.597 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Aug 31 00:40:39.597 INFO kablam!    |   ^^^^^
Aug 31 00:40:39.597 INFO kablam!    |
Aug 31 00:40:39.598 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 00:40:39.598 INFO kablam! 
Aug 31 00:40:39.598 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 00:40:39.598 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 31 00:40:39.599 INFO kablam!    |
Aug 31 00:40:39.599 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Aug 31 00:40:39.599 INFO kablam!    |   ^^^^^
Aug 31 00:40:39.599 INFO kablam!    |
Aug 31 00:40:39.599 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 00:40:39.600 INFO kablam! 
Aug 31 00:40:39.600 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 00:40:39.600 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 31 00:40:39.600 INFO kablam!    |
Aug 31 00:40:39.600 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Aug 31 00:40:39.600 INFO kablam!    |   ^^^^^
Aug 31 00:40:39.601 INFO kablam!    |
Aug 31 00:40:39.601 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 00:40:39.601 INFO kablam! 
Aug 31 00:40:39.602 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 00:40:39.602 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Aug 31 00:40:39.602 INFO kablam!    |
Aug 31 00:40:39.602 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 31 00:40:39.602 INFO kablam!    |   ^^^^^
Aug 31 00:40:39.602 INFO kablam!    |
Aug 31 00:40:39.603 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 00:40:39.603 INFO kablam! 
Aug 31 00:40:39.604 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 00:40:39.604 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/mod.rs:46:3
Aug 31 00:40:39.604 INFO kablam!    |
Aug 31 00:40:39.604 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Aug 31 00:40:39.604 INFO kablam!    |   ^^^^^
Aug 31 00:40:39.604 INFO kablam!    |
Aug 31 00:40:39.604 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 31 00:40:39.605 INFO kablam! 
Aug 31 00:40:39.710 INFO kablam! error: aborting due to 7 previous errors
Aug 31 00:40:39.710 INFO kablam! 
Aug 31 00:40:39.711 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 31 00:40:39.719 INFO kablam! error: Could not compile `log4rs`.
Aug 31 00:40:39.719 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 31 00:40:40.064 INFO kablam! error: build failed
Aug 31 00:40:40.065 INFO kablam! su: No module specific data is present
Aug 31 00:40:40.555 INFO running `"docker" "rm" "-f" "7a200dcf96c413ce3bf32fb8cade0dc3e25d190a014f953e362062c003039230"`
Aug 31 00:40:40.660 INFO blam! 7a200dcf96c413ce3bf32fb8cade0dc3e25d190a014f953e362062c003039230