Sep 01 07:35:54.846 INFO checking connect-0.1.1 against try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b for pr-53578
Sep 01 07:35:54.846 INFO running: cargo +a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b-alt check --frozen --all --all-targets
Sep 01 07:35:54.846 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 07:35:54.989 INFO blam! a9116984620c2cabc874530d32171acaea63d6e9e92d46386e87e1cd250a9e9b
Sep 01 07:35:54.991 INFO running `"docker" "start" "-a" "a9116984620c2cabc874530d32171acaea63d6e9e92d46386e87e1cd250a9e9b"`
Sep 01 07:35:55.837 INFO kablam!     Checking bytes v0.4.9
Sep 01 07:35:55.839 INFO kablam!     Checking mio-extras v2.0.5
Sep 01 07:35:55.840 INFO kablam!     Checking log4rs v0.8.0
Sep 01 07:35:57.566 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 07:35:57.566 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/file.rs:25:3
Sep 01 07:35:57.566 INFO kablam!    |
Sep 01 07:35:57.566 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 01 07:35:57.566 INFO kablam!    |   ^^^^^
Sep 01 07:35:57.566 INFO kablam!    |
Sep 01 07:35:57.566 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:35:57.566 INFO kablam! 
Sep 01 07:35:57.567 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 07:35:57.567 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/console.rs:24:3
Sep 01 07:35:57.567 INFO kablam!    |
Sep 01 07:35:57.567 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 07:35:57.567 INFO kablam!    |   ^^^^^
Sep 01 07:35:57.567 INFO kablam!    |
Sep 01 07:35:57.567 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:35:57.567 INFO kablam! 
Sep 01 07:35:57.568 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 07:35:57.568 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 07:35:57.568 INFO kablam!    |
Sep 01 07:35:57.568 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 01 07:35:57.568 INFO kablam!    |   ^^^^^
Sep 01 07:35:57.568 INFO kablam!    |
Sep 01 07:35:57.568 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:35:57.568 INFO kablam! 
Sep 01 07:35:57.568 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 07:35:57.568 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 07:35:57.568 INFO kablam!    |
Sep 01 07:35:57.568 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 01 07:35:57.568 INFO kablam!    |   ^^^^^
Sep 01 07:35:57.568 INFO kablam!    |
Sep 01 07:35:57.568 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:35:57.568 INFO kablam! 
Sep 01 07:35:57.568 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 07:35:57.568 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 07:35:57.568 INFO kablam!    |
Sep 01 07:35:57.568 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 01 07:35:57.568 INFO kablam!    |   ^^^^^
Sep 01 07:35:57.568 INFO kablam!    |
Sep 01 07:35:57.568 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:35:57.569 INFO kablam! 
Sep 01 07:35:57.569 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 07:35:57.569 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 07:35:57.569 INFO kablam!    |
Sep 01 07:35:57.569 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 07:35:57.569 INFO kablam!    |   ^^^^^
Sep 01 07:35:57.569 INFO kablam!    |
Sep 01 07:35:57.569 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:35:57.569 INFO kablam! 
Sep 01 07:35:57.569 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 07:35:57.569 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/mod.rs:46:3
Sep 01 07:35:57.569 INFO kablam!    |
Sep 01 07:35:57.569 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 01 07:35:57.569 INFO kablam!    |   ^^^^^
Sep 01 07:35:57.569 INFO kablam!    |
Sep 01 07:35:57.569 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:35:57.569 INFO kablam! 
Sep 01 07:35:57.678 INFO kablam! error: aborting due to 7 previous errors
Sep 01 07:35:57.678 INFO kablam! 
Sep 01 07:35:57.678 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 01 07:35:57.687 INFO kablam! error: Could not compile `log4rs`.
Sep 01 07:35:57.687 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 01 07:35:57.974 INFO kablam! error: build failed
Sep 01 07:35:57.976 INFO kablam! su: No module specific data is present
Sep 01 07:35:58.434 INFO running `"docker" "rm" "-f" "a9116984620c2cabc874530d32171acaea63d6e9e92d46386e87e1cd250a9e9b"`
Sep 01 07:35:58.591 INFO blam! a9116984620c2cabc874530d32171acaea63d6e9e92d46386e87e1cd250a9e9b