Sep 02 03:22:53.817 INFO checking amqpr-0.2.2 against try#aa245a5862056b681d2ccdb178f58891108cd3a6 for pr-53831
Sep 02 03:22:53.817 INFO running: cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets
Sep 02 03:22:53.817 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53831/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-3/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 02 03:22:54.062 INFO blam! c1f7a8e8e8778b950a1d29aaed64f2de0e7ed1dad47daa2c6547c705a7c9e4f9
Sep 02 03:22:54.064 INFO running `"docker" "start" "-a" "c1f7a8e8e8778b950a1d29aaed64f2de0e7ed1dad47daa2c6547c705a7c9e4f9"`
Sep 02 03:22:54.943 INFO kablam!     Checking ex-futures v0.4.9
Sep 02 03:22:54.946 INFO kablam!     Checking amqpr-codec v0.2.4
Sep 02 03:22:54.947 INFO kablam!     Checking log4rs v0.7.0
Sep 02 03:22:57.059 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 02 03:22:57.059 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/file.rs:25:3
Sep 02 03:22:57.060 INFO kablam!    |
Sep 02 03:22:57.060 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 02 03:22:57.060 INFO kablam!    |   ^^^^^
Sep 02 03:22:57.060 INFO kablam!    |
Sep 02 03:22:57.060 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 03:22:57.060 INFO kablam! 
Sep 02 03:22:57.060 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 02 03:22:57.060 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/console.rs:24:3
Sep 02 03:22:57.060 INFO kablam!    |
Sep 02 03:22:57.060 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 02 03:22:57.060 INFO kablam!    |   ^^^^^
Sep 02 03:22:57.060 INFO kablam!    |
Sep 02 03:22:57.060 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 03:22:57.060 INFO kablam! 
Sep 02 03:22:57.061 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 02 03:22:57.061 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/roll/delete.rs:16:3
Sep 02 03:22:57.061 INFO kablam!    |
Sep 02 03:22:57.061 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 02 03:22:57.061 INFO kablam!    |   ^^^^^
Sep 02 03:22:57.061 INFO kablam!    |
Sep 02 03:22:57.062 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 03:22:57.062 INFO kablam! 
Sep 02 03:22:57.062 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 02 03:22:57.062 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
Sep 02 03:22:57.062 INFO kablam!    |
Sep 02 03:22:57.062 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 02 03:22:57.062 INFO kablam!    |   ^^^^^
Sep 02 03:22:57.062 INFO kablam!    |
Sep 02 03:22:57.062 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 03:22:57.062 INFO kablam! 
Sep 02 03:22:57.062 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 02 03:22:57.062 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/trigger/size.rs:21:3
Sep 02 03:22:57.062 INFO kablam!    |
Sep 02 03:22:57.062 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 02 03:22:57.062 INFO kablam!    |   ^^^^^
Sep 02 03:22:57.062 INFO kablam!    |
Sep 02 03:22:57.062 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 03:22:57.062 INFO kablam! 
Sep 02 03:22:57.062 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 02 03:22:57.062 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 02 03:22:57.062 INFO kablam!    |
Sep 02 03:22:57.062 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 02 03:22:57.062 INFO kablam!    |   ^^^^^
Sep 02 03:22:57.062 INFO kablam!    |
Sep 02 03:22:57.062 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 03:22:57.062 INFO kablam! 
Sep 02 03:22:57.062 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 02 03:22:57.062 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/mod.rs:46:3
Sep 02 03:22:57.062 INFO kablam!    |
Sep 02 03:22:57.062 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 02 03:22:57.062 INFO kablam!    |   ^^^^^
Sep 02 03:22:57.062 INFO kablam!    |
Sep 02 03:22:57.063 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 03:22:57.063 INFO kablam! 
Sep 02 03:22:57.168 INFO kablam! error: aborting due to 7 previous errors
Sep 02 03:22:57.168 INFO kablam! 
Sep 02 03:22:57.168 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 02 03:22:57.176 INFO kablam! error: Could not compile `log4rs`.
Sep 02 03:22:57.177 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 02 03:22:57.590 INFO kablam! error: build failed
Sep 02 03:22:57.590 INFO kablam! su: No module specific data is present
Sep 02 03:22:58.174 INFO running `"docker" "rm" "-f" "c1f7a8e8e8778b950a1d29aaed64f2de0e7ed1dad47daa2c6547c705a7c9e4f9"`
Sep 02 03:22:58.258 INFO blam! c1f7a8e8e8778b950a1d29aaed64f2de0e7ed1dad47daa2c6547c705a7c9e4f9