Aug 30 20:51:20.954 INFO checking crust-0.28.1 against master#ede55518431154bc761f7b2438cce9078c162700 for pr-53707
Aug 30 20:51:20.954 INFO running: cargo +ede55518431154bc761f7b2438cce9078c162700-alt check --frozen --all --all-targets
Aug 30 20:51:20.954 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53707/master#ede55518431154bc761f7b2438cce9078c162700:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53707/worker-2/master#ede55518431154bc761f7b2438cce9078c162700:/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 +ede55518431154bc761f7b2438cce9078c162700-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 30 20:51:21.212 INFO blam! 7b76d0833969ae825ae4f2c8c2031b6d0615e9b052450322faa21fff4ec8404f
Aug 30 20:51:21.214 INFO running `"docker" "start" "-a" "7b76d0833969ae825ae4f2c8c2031b6d0615e9b052450322faa21fff4ec8404f"`
Aug 30 20:51:22.417 INFO kablam!     Checking tiny-keccak v1.3.1
Aug 30 20:51:22.420 INFO kablam!     Checking bytes v0.4.9
Aug 30 20:51:22.426 INFO kablam!     Checking bincode v0.8.0
Aug 30 20:51:22.426 INFO kablam!     Checking hyper v0.10.13
Aug 30 20:51:22.427 INFO kablam!    Compiling rust_sodium-sys v0.5.0
Aug 30 20:51:22.427 INFO kablam!     Checking log4rs v0.7.0
Aug 30 20:51:27.678 INFO kablam!     Checking ws v0.7.3
Aug 30 20:51:27.996 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 30 20:51:27.997 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/file.rs:25:3
Aug 30 20:51:27.997 INFO kablam!    |
Aug 30 20:51:27.997 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Aug 30 20:51:27.997 INFO kablam!    |   ^^^^^
Aug 30 20:51:28.000 INFO kablam!    |
Aug 30 20:51:28.000 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 20:51:28.001 INFO kablam! 
Aug 30 20:51:28.001 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 30 20:51:28.001 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/console.rs:24:3
Aug 30 20:51:28.001 INFO kablam!    |
Aug 30 20:51:28.001 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 30 20:51:28.001 INFO kablam!    |   ^^^^^
Aug 30 20:51:28.001 INFO kablam!    |
Aug 30 20:51:28.001 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 20:51:28.001 INFO kablam! 
Aug 30 20:51:28.002 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 30 20:51:28.002 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 30 20:51:28.002 INFO kablam!    |
Aug 30 20:51:28.002 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Aug 30 20:51:28.002 INFO kablam!    |   ^^^^^
Aug 30 20:51:28.002 INFO kablam!    |
Aug 30 20:51:28.002 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 20:51:28.002 INFO kablam! 
Aug 30 20:51:28.002 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 30 20:51:28.002 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 30 20:51:28.002 INFO kablam!    |
Aug 30 20:51:28.002 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Aug 30 20:51:28.002 INFO kablam!    |   ^^^^^
Aug 30 20:51:28.002 INFO kablam!    |
Aug 30 20:51:28.002 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 20:51:28.003 INFO kablam! 
Aug 30 20:51:28.003 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 30 20:51:28.003 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 30 20:51:28.003 INFO kablam!    |
Aug 30 20:51:28.003 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Aug 30 20:51:28.003 INFO kablam!    |   ^^^^^
Aug 30 20:51:28.003 INFO kablam!    |
Aug 30 20:51:28.003 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 20:51:28.003 INFO kablam! 
Aug 30 20:51:28.003 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 30 20:51:28.003 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Aug 30 20:51:28.003 INFO kablam!    |
Aug 30 20:51:28.003 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Aug 30 20:51:28.003 INFO kablam!    |   ^^^^^
Aug 30 20:51:28.003 INFO kablam!    |
Aug 30 20:51:28.003 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 20:51:28.004 INFO kablam! 
Aug 30 20:51:28.004 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 30 20:51:28.004 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/mod.rs:46:3
Aug 30 20:51:28.004 INFO kablam!    |
Aug 30 20:51:28.004 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Aug 30 20:51:28.004 INFO kablam!    |   ^^^^^
Aug 30 20:51:28.004 INFO kablam!    |
Aug 30 20:51:28.004 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Aug 30 20:51:28.004 INFO kablam! 
Aug 30 20:51:28.170 INFO kablam! error: aborting due to 7 previous errors
Aug 30 20:51:28.170 INFO kablam! 
Aug 30 20:51:28.170 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 30 20:51:28.180 INFO kablam! error: Could not compile `log4rs`.
Aug 30 20:51:28.181 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 30 20:52:19.987 INFO kablam! error: build failed
Aug 30 20:52:19.989 INFO kablam! su: No module specific data is present
Aug 30 20:52:20.568 INFO running `"docker" "rm" "-f" "7b76d0833969ae825ae4f2c8c2031b6d0615e9b052450322faa21fff4ec8404f"`
Aug 30 20:52:20.670 INFO blam! 7b76d0833969ae825ae4f2c8c2031b6d0615e9b052450322faa21fff4ec8404f