Sep 02 17:40:57.308 INFO checking connect-0.1.1 against try#952c7dbfa2628309f557b367929ffc17af20b332 for pr-53851
Sep 02 17:40:57.308 INFO running: cargo +952c7dbfa2628309f557b367929ffc17af20b332-alt check --frozen --all --all-targets
Sep 02 17:40:57.308 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53851/try#952c7dbfa2628309f557b367929ffc17af20b332:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53851/worker-2/try#952c7dbfa2628309f557b367929ffc17af20b332:/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 +952c7dbfa2628309f557b367929ffc17af20b332-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 02 17:40:57.543 INFO blam! bdea7fd5eed05285e6b09c6627eb8b0a9b2a6128a714445b5080b7457d8b436f
Sep 02 17:40:57.545 INFO running `"docker" "start" "-a" "bdea7fd5eed05285e6b09c6627eb8b0a9b2a6128a714445b5080b7457d8b436f"`
Sep 02 17:40:58.642 INFO kablam!     Checking bytes v0.4.9
Sep 02 17:40:58.644 INFO kablam!     Checking mio-extras v2.0.5
Sep 02 17:40:58.645 INFO kablam!     Checking log4rs v0.8.0
Sep 02 17:41:01.659 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 17:41:01.660 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/file.rs:25:3
Sep 02 17:41:01.660 INFO kablam!    |
Sep 02 17:41:01.660 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 02 17:41:01.660 INFO kablam!    |   ^^^^^
Sep 02 17:41:01.660 INFO kablam!    |
Sep 02 17:41:01.660 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 17:41:01.660 INFO kablam! 
Sep 02 17:41:01.661 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 17:41:01.661 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/console.rs:24:3
Sep 02 17:41:01.661 INFO kablam!    |
Sep 02 17:41:01.661 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 02 17:41:01.661 INFO kablam!    |   ^^^^^
Sep 02 17:41:01.661 INFO kablam!    |
Sep 02 17:41:01.661 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 17:41:01.661 INFO kablam! 
Sep 02 17:41:01.661 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 17:41:01.661 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 17:41:01.661 INFO kablam!    |
Sep 02 17:41:01.661 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 02 17:41:01.661 INFO kablam!    |   ^^^^^
Sep 02 17:41:01.661 INFO kablam!    |
Sep 02 17:41:01.661 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 17:41:01.662 INFO kablam! 
Sep 02 17:41:01.662 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 17:41:01.662 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 17:41:01.662 INFO kablam!    |
Sep 02 17:41:01.662 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 02 17:41:01.662 INFO kablam!    |   ^^^^^
Sep 02 17:41:01.662 INFO kablam!    |
Sep 02 17:41:01.662 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 17:41:01.662 INFO kablam! 
Sep 02 17:41:01.662 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 17:41:01.662 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 17:41:01.662 INFO kablam!    |
Sep 02 17:41:01.662 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 02 17:41:01.662 INFO kablam!    |   ^^^^^
Sep 02 17:41:01.662 INFO kablam!    |
Sep 02 17:41:01.662 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 17:41:01.662 INFO kablam! 
Sep 02 17:41:01.662 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 17:41:01.662 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 17:41:01.662 INFO kablam!    |
Sep 02 17:41:01.662 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 02 17:41:01.662 INFO kablam!    |   ^^^^^
Sep 02 17:41:01.662 INFO kablam!    |
Sep 02 17:41:01.662 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 17:41:01.662 INFO kablam! 
Sep 02 17:41:01.662 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 17:41:01.662 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/mod.rs:46:3
Sep 02 17:41:01.663 INFO kablam!    |
Sep 02 17:41:01.663 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 02 17:41:01.663 INFO kablam!    |   ^^^^^
Sep 02 17:41:01.663 INFO kablam!    |
Sep 02 17:41:01.665 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 17:41:01.665 INFO kablam! 
Sep 02 17:41:01.767 INFO kablam! error: aborting due to 7 previous errors
Sep 02 17:41:01.767 INFO kablam! 
Sep 02 17:41:01.767 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 02 17:41:01.776 INFO kablam! error: Could not compile `log4rs`.
Sep 02 17:41:01.777 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 02 17:41:01.831 INFO kablam! error: build failed
Sep 02 17:41:01.833 INFO kablam! su: No module specific data is present
Sep 02 17:41:02.348 INFO running `"docker" "rm" "-f" "bdea7fd5eed05285e6b09c6627eb8b0a9b2a6128a714445b5080b7457d8b436f"`
Sep 02 17:41:02.500 INFO blam! bdea7fd5eed05285e6b09c6627eb8b0a9b2a6128a714445b5080b7457d8b436f