Sep 01 07:07:25.690 INFO checking crust-0.31.0 against try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b for pr-53578
Sep 01 07:07:25.690 INFO running: cargo +a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b-alt check --frozen --all --all-targets
Sep 01 07:07:25.690 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53578/try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578/worker-2/try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b:/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 +a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 07:07:25.866 INFO blam! 79f20bde1f4320e3807062ac43639e6622c7a37fd3fa9fccc728a473a80e96bb
Sep 01 07:07:25.868 INFO running `"docker" "start" "-a" "79f20bde1f4320e3807062ac43639e6622c7a37fd3fa9fccc728a473a80e96bb"`
Sep 01 07:07:27.005 INFO kablam!    Compiling want v0.0.4
Sep 01 07:07:27.008 INFO kablam!    Compiling tokio-io v0.1.8
Sep 01 07:07:27.008 INFO kablam!    Compiling mio-uds v0.6.6
Sep 01 07:07:27.017 INFO kablam!    Compiling tokio-threadpool v0.1.6
Sep 01 07:07:27.017 INFO kablam!    Compiling libflate v0.1.16
Sep 01 07:07:27.017 INFO kablam!    Compiling serde_urlencoded v0.5.3
Sep 01 07:07:27.033 INFO kablam!     Checking log4rs v0.7.0
Sep 01 07:07:31.381 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 01 07:07:31.381 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/file.rs:25:3
Sep 01 07:07:31.381 INFO kablam!    |
Sep 01 07:07:31.381 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 01 07:07:31.381 INFO kablam!    |   ^^^^^
Sep 01 07:07:31.381 INFO kablam!    |
Sep 01 07:07:31.381 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:07:31.381 INFO kablam! 
Sep 01 07:07:31.381 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 01 07:07:31.381 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/console.rs:24:3
Sep 01 07:07:31.381 INFO kablam!    |
Sep 01 07:07:31.381 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 07:07:31.381 INFO kablam!    |   ^^^^^
Sep 01 07:07:31.391 INFO kablam!    |
Sep 01 07:07:31.391 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:07:31.391 INFO kablam! 
Sep 01 07:07:31.391 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 01 07:07:31.391 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 01 07:07:31.391 INFO kablam!    |
Sep 01 07:07:31.391 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 01 07:07:31.391 INFO kablam!    |   ^^^^^
Sep 01 07:07:31.391 INFO kablam!    |
Sep 01 07:07:31.391 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:07:31.391 INFO kablam! 
Sep 01 07:07:31.391 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 01 07:07:31.391 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 01 07:07:31.391 INFO kablam!    |
Sep 01 07:07:31.392 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 01 07:07:31.392 INFO kablam!    |   ^^^^^
Sep 01 07:07:31.392 INFO kablam!    |
Sep 01 07:07:31.392 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:07:31.392 INFO kablam! 
Sep 01 07:07:31.392 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 01 07:07:31.392 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 01 07:07:31.392 INFO kablam!    |
Sep 01 07:07:31.392 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 01 07:07:31.392 INFO kablam!    |   ^^^^^
Sep 01 07:07:31.392 INFO kablam!    |
Sep 01 07:07:31.392 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:07:31.392 INFO kablam! 
Sep 01 07:07:31.392 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 01 07:07:31.392 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 01 07:07:31.392 INFO kablam!    |
Sep 01 07:07:31.392 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 07:07:31.392 INFO kablam!    |   ^^^^^
Sep 01 07:07:31.392 INFO kablam!    |
Sep 01 07:07:31.392 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:07:31.392 INFO kablam! 
Sep 01 07:07:31.392 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 01 07:07:31.392 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/mod.rs:46:3
Sep 01 07:07:31.392 INFO kablam!    |
Sep 01 07:07:31.392 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 01 07:07:31.393 INFO kablam!    |   ^^^^^
Sep 01 07:07:31.393 INFO kablam!    |
Sep 01 07:07:31.393 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:07:31.393 INFO kablam! 
Sep 01 07:07:31.684 INFO kablam! error: aborting due to 7 previous errors
Sep 01 07:07:31.684 INFO kablam! 
Sep 01 07:07:31.684 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 01 07:07:31.699 INFO kablam! error: Could not compile `log4rs`.
Sep 01 07:07:31.700 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 01 07:07:37.724 INFO kablam! error: build failed
Sep 01 07:07:37.726 INFO kablam! su: No module specific data is present
Sep 01 07:07:38.235 INFO running `"docker" "rm" "-f" "79f20bde1f4320e3807062ac43639e6622c7a37fd3fa9fccc728a473a80e96bb"`
Sep 01 07:07:38.392 INFO blam! 79f20bde1f4320e3807062ac43639e6622c7a37fd3fa9fccc728a473a80e96bb