Sep 01 07:35:55.645 INFO checking connect-0.1.1 against master#d0d81b7fc1421859ba0218e8a437af29ae3b0967 for pr-53578
Sep 01 07:35:55.645 INFO running: cargo +d0d81b7fc1421859ba0218e8a437af29ae3b0967-alt check --frozen --all --all-targets
Sep 01 07:35:55.646 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53578/master#d0d81b7fc1421859ba0218e8a437af29ae3b0967:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578/worker-3/master#d0d81b7fc1421859ba0218e8a437af29ae3b0967:/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 +d0d81b7fc1421859ba0218e8a437af29ae3b0967-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 07:35:55.799 INFO blam! 2fc66349fd306b05679559a6ad56a4e1f59f6922c5a955fe1ab0e88c8305ff4d
Sep 01 07:35:55.801 INFO running `"docker" "start" "-a" "2fc66349fd306b05679559a6ad56a4e1f59f6922c5a955fe1ab0e88c8305ff4d"`
Sep 01 07:35:56.920 INFO kablam!     Checking bytes v0.4.9
Sep 01 07:35:56.922 INFO kablam!     Checking mio-extras v2.0.5
Sep 01 07:35:56.922 INFO kablam!     Checking log4rs v0.8.0
Sep 01 07:35:59.220 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 07:35:59.220 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/file.rs:25:3
Sep 01 07:35:59.220 INFO kablam!    |
Sep 01 07:35:59.220 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 01 07:35:59.220 INFO kablam!    |   ^^^^^
Sep 01 07:35:59.220 INFO kablam!    |
Sep 01 07:35:59.220 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:35:59.220 INFO kablam! 
Sep 01 07:35:59.220 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 07:35:59.220 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/console.rs:24:3
Sep 01 07:35:59.220 INFO kablam!    |
Sep 01 07:35:59.220 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 07:35:59.220 INFO kablam!    |   ^^^^^
Sep 01 07:35:59.220 INFO kablam!    |
Sep 01 07:35:59.221 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:35:59.221 INFO kablam! 
Sep 01 07:35:59.221 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 07:35:59.221 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 01 07:35:59.221 INFO kablam!    |
Sep 01 07:35:59.221 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 01 07:35:59.221 INFO kablam!    |   ^^^^^
Sep 01 07:35:59.221 INFO kablam!    |
Sep 01 07:35:59.221 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:35:59.221 INFO kablam! 
Sep 01 07:35:59.221 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 07:35:59.221 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 01 07:35:59.221 INFO kablam!    |
Sep 01 07:35:59.221 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 01 07:35:59.221 INFO kablam!    |   ^^^^^
Sep 01 07:35:59.221 INFO kablam!    |
Sep 01 07:35:59.221 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:35:59.221 INFO kablam! 
Sep 01 07:35:59.221 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 07:35:59.221 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 01 07:35:59.221 INFO kablam!    |
Sep 01 07:35:59.221 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 01 07:35:59.221 INFO kablam!    |   ^^^^^
Sep 01 07:35:59.222 INFO kablam!    |
Sep 01 07:35:59.222 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:35:59.222 INFO kablam! 
Sep 01 07:35:59.222 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 07:35:59.222 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 01 07:35:59.222 INFO kablam!    |
Sep 01 07:35:59.222 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 07:35:59.222 INFO kablam!    |   ^^^^^
Sep 01 07:35:59.222 INFO kablam!    |
Sep 01 07:35:59.222 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:35:59.222 INFO kablam! 
Sep 01 07:35:59.222 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 07:35:59.222 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/mod.rs:46:3
Sep 01 07:35:59.222 INFO kablam!    |
Sep 01 07:35:59.222 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 01 07:35:59.222 INFO kablam!    |   ^^^^^
Sep 01 07:35:59.222 INFO kablam!    |
Sep 01 07:35:59.222 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:35:59.222 INFO kablam! 
Sep 01 07:35:59.344 INFO kablam! error: aborting due to 7 previous errors
Sep 01 07:35:59.345 INFO kablam! 
Sep 01 07:35:59.345 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 01 07:35:59.354 INFO kablam! error: Could not compile `log4rs`.
Sep 01 07:35:59.354 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 01 07:35:59.560 INFO kablam! error: build failed
Sep 01 07:35:59.562 INFO kablam! su: No module specific data is present
Sep 01 07:36:00.083 INFO running `"docker" "rm" "-f" "2fc66349fd306b05679559a6ad56a4e1f59f6922c5a955fe1ab0e88c8305ff4d"`
Sep 01 07:36:00.214 INFO blam! 2fc66349fd306b05679559a6ad56a4e1f59f6922c5a955fe1ab0e88c8305ff4d