Sep 04 05:31:23.836 INFO checking rubrail-0.5.0 against master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c for pr-53893
Sep 04 05:31:23.836 INFO running: cargo +28bcffead74d5e17c6cb1f7de432e37f93a6b50c-alt check --frozen --all --all-targets
Sep 04 05:31:23.836 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53893/master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53893/worker-1/master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c:/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 +28bcffead74d5e17c6cb1f7de432e37f93a6b50c-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 05:31:24.050 INFO blam! f3247310826f5815ba7661815f5e5e8ca69736ff30e5fe66f39ace37d9102aa1
Sep 04 05:31:24.053 INFO running `"docker" "start" "-a" "f3247310826f5815ba7661815f5e5e8ca69736ff30e5fe66f39ace37d9102aa1"`
Sep 04 05:31:24.931 INFO kablam!    Compiling rubrail v0.5.0 (file:///source)
Sep 04 05:31:24.933 INFO kablam!     Checking serde_yaml v0.6.2
Sep 04 05:31:27.062 INFO kablam!     Checking log4rs v0.6.3
Sep 04 05:31:28.333 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 04 05:31:28.333 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/file.rs:25:3
Sep 04 05:31:28.333 INFO kablam!    |
Sep 04 05:31:28.334 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 04 05:31:28.334 INFO kablam!    |   ^^^^^
Sep 04 05:31:28.334 INFO kablam!    |
Sep 04 05:31:28.334 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 05:31:28.334 INFO kablam! 
Sep 04 05:31:28.334 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 04 05:31:28.335 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/console.rs:24:3
Sep 04 05:31:28.335 INFO kablam!    |
Sep 04 05:31:28.335 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 04 05:31:28.335 INFO kablam!    |   ^^^^^
Sep 04 05:31:28.335 INFO kablam!    |
Sep 04 05:31:28.335 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 05:31:28.335 INFO kablam! 
Sep 04 05:31:28.335 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 04 05:31:28.335 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/rolling_file/policy/compound/roll/delete.rs:16:3
Sep 04 05:31:28.335 INFO kablam!    |
Sep 04 05:31:28.335 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 04 05:31:28.335 INFO kablam!    |   ^^^^^
Sep 04 05:31:28.335 INFO kablam!    |
Sep 04 05:31:28.335 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 05:31:28.335 INFO kablam! 
Sep 04 05:31:28.335 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 04 05:31:28.335 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/rolling_file/policy/compound/roll/fixed_window.rs:17:3
Sep 04 05:31:28.335 INFO kablam!    |
Sep 04 05:31:28.335 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 04 05:31:28.335 INFO kablam!    |   ^^^^^
Sep 04 05:31:28.335 INFO kablam!    |
Sep 04 05:31:28.335 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 05:31:28.335 INFO kablam! 
Sep 04 05:31:28.335 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 04 05:31:28.335 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/rolling_file/policy/compound/trigger/size.rs:21:3
Sep 04 05:31:28.336 INFO kablam!    |
Sep 04 05:31:28.336 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 04 05:31:28.336 INFO kablam!    |   ^^^^^
Sep 04 05:31:28.336 INFO kablam!    |
Sep 04 05:31:28.336 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 05:31:28.336 INFO kablam! 
Sep 04 05:31:28.336 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 04 05:31:28.336 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 04 05:31:28.336 INFO kablam!    |
Sep 04 05:31:28.336 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 04 05:31:28.336 INFO kablam!    |   ^^^^^
Sep 04 05:31:28.336 INFO kablam!    |
Sep 04 05:31:28.336 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 05:31:28.337 INFO kablam! 
Sep 04 05:31:28.337 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 04 05:31:28.337 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/rolling_file/mod.rs:46:3
Sep 04 05:31:28.337 INFO kablam!    |
Sep 04 05:31:28.337 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 04 05:31:28.337 INFO kablam!    |   ^^^^^
Sep 04 05:31:28.337 INFO kablam!    |
Sep 04 05:31:28.337 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 05:31:28.337 INFO kablam! 
Sep 04 05:31:28.380 INFO kablam! error: aborting due to 7 previous errors
Sep 04 05:31:28.380 INFO kablam! 
Sep 04 05:31:28.380 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 04 05:31:28.396 INFO kablam! error: Could not compile `log4rs`.
Sep 04 05:31:28.396 INFO kablam! 
Sep 04 05:31:28.396 INFO kablam! To learn more, run the command again with --verbose.
Sep 04 05:31:28.403 INFO kablam! su: No module specific data is present
Sep 04 05:31:28.859 INFO running `"docker" "rm" "-f" "f3247310826f5815ba7661815f5e5e8ca69736ff30e5fe66f39ace37d9102aa1"`
Sep 04 05:31:28.989 INFO blam! f3247310826f5815ba7661815f5e5e8ca69736ff30e5fe66f39ace37d9102aa1