Sep 02 00:06:23.251 INFO checking connect-0.1.1 against try#aa245a5862056b681d2ccdb178f58891108cd3a6 for pr-53831
Sep 02 00:06:23.251 INFO running: cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets
Sep 02 00:06:23.251 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 00:06:23.482 INFO blam! d55928f4674c6a29aa52a920c0b5a6bfb77748e029cecbf18311b1c13b24a72d
Sep 02 00:06:23.485 INFO running `"docker" "start" "-a" "d55928f4674c6a29aa52a920c0b5a6bfb77748e029cecbf18311b1c13b24a72d"`
Sep 02 00:06:24.487 INFO kablam!     Checking bytes v0.4.9
Sep 02 00:06:24.488 INFO kablam!     Checking mio-extras v2.0.5
Sep 02 00:06:24.488 INFO kablam!     Checking log4rs v0.8.0
Sep 02 00:06:26.340 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 00:06:26.340 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/file.rs:25:3
Sep 02 00:06:26.340 INFO kablam!    |
Sep 02 00:06:26.340 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 02 00:06:26.340 INFO kablam!    |   ^^^^^
Sep 02 00:06:26.340 INFO kablam!    |
Sep 02 00:06:26.340 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 00:06:26.340 INFO kablam! 
Sep 02 00:06:26.341 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 00:06:26.341 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/console.rs:24:3
Sep 02 00:06:26.341 INFO kablam!    |
Sep 02 00:06:26.341 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 02 00:06:26.341 INFO kablam!    |   ^^^^^
Sep 02 00:06:26.342 INFO kablam!    |
Sep 02 00:06:26.342 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 00:06:26.342 INFO kablam! 
Sep 02 00:06:26.342 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 00:06:26.342 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 02 00:06:26.342 INFO kablam!    |
Sep 02 00:06:26.342 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 02 00:06:26.342 INFO kablam!    |   ^^^^^
Sep 02 00:06:26.342 INFO kablam!    |
Sep 02 00:06:26.342 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 00:06:26.342 INFO kablam! 
Sep 02 00:06:26.342 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 00:06:26.342 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 02 00:06:26.342 INFO kablam!    |
Sep 02 00:06:26.342 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 02 00:06:26.342 INFO kablam!    |   ^^^^^
Sep 02 00:06:26.342 INFO kablam!    |
Sep 02 00:06:26.342 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 00:06:26.342 INFO kablam! 
Sep 02 00:06:26.342 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 00:06:26.342 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 02 00:06:26.342 INFO kablam!    |
Sep 02 00:06:26.342 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 02 00:06:26.342 INFO kablam!    |   ^^^^^
Sep 02 00:06:26.342 INFO kablam!    |
Sep 02 00:06:26.342 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 00:06:26.342 INFO kablam! 
Sep 02 00:06:26.342 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 00:06:26.342 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 02 00:06:26.342 INFO kablam!    |
Sep 02 00:06:26.342 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 02 00:06:26.342 INFO kablam!    |   ^^^^^
Sep 02 00:06:26.343 INFO kablam!    |
Sep 02 00:06:26.343 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 00:06:26.343 INFO kablam! 
Sep 02 00:06:26.343 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 00:06:26.343 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/mod.rs:46:3
Sep 02 00:06:26.343 INFO kablam!    |
Sep 02 00:06:26.343 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 02 00:06:26.343 INFO kablam!    |   ^^^^^
Sep 02 00:06:26.343 INFO kablam!    |
Sep 02 00:06:26.343 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 00:06:26.343 INFO kablam! 
Sep 02 00:06:26.440 INFO kablam! error: aborting due to 7 previous errors
Sep 02 00:06:26.440 INFO kablam! 
Sep 02 00:06:26.440 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 02 00:06:26.448 INFO kablam! error: Could not compile `log4rs`.
Sep 02 00:06:26.448 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 02 00:06:26.624 INFO kablam! error: build failed
Sep 02 00:06:26.625 INFO kablam! su: No module specific data is present
Sep 02 00:06:27.393 INFO running `"docker" "rm" "-f" "d55928f4674c6a29aa52a920c0b5a6bfb77748e029cecbf18311b1c13b24a72d"`
Sep 02 00:06:27.528 INFO blam! d55928f4674c6a29aa52a920c0b5a6bfb77748e029cecbf18311b1c13b24a72d