Sep 04 08:38:19.453 INFO checking rubrail-0.5.0 against master#2687112ea6a8701cbf36e6dd4d77d64694cf93d8 for pr-53913
Sep 04 08:38:19.453 INFO running: cargo +2687112ea6a8701cbf36e6dd4d77d64694cf93d8-alt check --frozen --all --all-targets
Sep 04 08:38:19.453 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53913/master#2687112ea6a8701cbf36e6dd4d77d64694cf93d8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53913/worker-3/master#2687112ea6a8701cbf36e6dd4d77d64694cf93d8:/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 +2687112ea6a8701cbf36e6dd4d77d64694cf93d8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 08:38:19.603 INFO blam! df9009dc726a3e488db74a80a315810f2fc9341442cf8cd55789e7d6742b358b
Sep 04 08:38:19.605 INFO running `"docker" "start" "-a" "df9009dc726a3e488db74a80a315810f2fc9341442cf8cd55789e7d6742b358b"`
Sep 04 08:38:20.349 INFO kablam!    Compiling rubrail v0.5.0 (file:///source)
Sep 04 08:38:20.352 INFO kablam!     Checking serde_yaml v0.6.2
Sep 04 08:38:21.763 INFO kablam!     Checking log4rs v0.6.3
Sep 04 08:38:22.701 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 08:38:22.701 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/file.rs:25:3
Sep 04 08:38:22.701 INFO kablam!    |
Sep 04 08:38:22.701 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 04 08:38:22.701 INFO kablam!    |   ^^^^^
Sep 04 08:38:22.701 INFO kablam!    |
Sep 04 08:38:22.701 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 08:38:22.701 INFO kablam! 
Sep 04 08:38:22.701 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 08:38:22.701 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/console.rs:24:3
Sep 04 08:38:22.701 INFO kablam!    |
Sep 04 08:38:22.701 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 04 08:38:22.701 INFO kablam!    |   ^^^^^
Sep 04 08:38:22.702 INFO kablam!    |
Sep 04 08:38:22.702 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 08:38:22.702 INFO kablam! 
Sep 04 08:38:22.702 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 08:38:22.702 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 08:38:22.702 INFO kablam!    |
Sep 04 08:38:22.702 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 04 08:38:22.702 INFO kablam!    |   ^^^^^
Sep 04 08:38:22.702 INFO kablam!    |
Sep 04 08:38:22.702 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 08:38:22.702 INFO kablam! 
Sep 04 08:38:22.702 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 08:38:22.702 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 08:38:22.702 INFO kablam!    |
Sep 04 08:38:22.702 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 04 08:38:22.702 INFO kablam!    |   ^^^^^
Sep 04 08:38:22.702 INFO kablam!    |
Sep 04 08:38:22.702 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 08:38:22.702 INFO kablam! 
Sep 04 08:38:22.702 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 08:38:22.702 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 08:38:22.702 INFO kablam!    |
Sep 04 08:38:22.702 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 04 08:38:22.702 INFO kablam!    |   ^^^^^
Sep 04 08:38:22.702 INFO kablam!    |
Sep 04 08:38:22.702 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 08:38:22.702 INFO kablam! 
Sep 04 08:38:22.702 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 08:38:22.702 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 08:38:22.702 INFO kablam!    |
Sep 04 08:38:22.703 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 04 08:38:22.703 INFO kablam!    |   ^^^^^
Sep 04 08:38:22.703 INFO kablam!    |
Sep 04 08:38:22.703 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 08:38:22.703 INFO kablam! 
Sep 04 08:38:22.703 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 08:38:22.703 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.6.3/src/append/rolling_file/mod.rs:46:3
Sep 04 08:38:22.703 INFO kablam!    |
Sep 04 08:38:22.703 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 04 08:38:22.703 INFO kablam!    |   ^^^^^
Sep 04 08:38:22.703 INFO kablam!    |
Sep 04 08:38:22.703 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 08:38:22.703 INFO kablam! 
Sep 04 08:38:22.744 INFO kablam! error: aborting due to 7 previous errors
Sep 04 08:38:22.744 INFO kablam! 
Sep 04 08:38:22.744 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 04 08:38:22.754 INFO kablam! error: Could not compile `log4rs`.
Sep 04 08:38:22.754 INFO kablam! 
Sep 04 08:38:22.754 INFO kablam! To learn more, run the command again with --verbose.
Sep 04 08:38:22.755 INFO kablam! su: No module specific data is present
Sep 04 08:38:23.166 INFO running `"docker" "rm" "-f" "df9009dc726a3e488db74a80a315810f2fc9341442cf8cd55789e7d6742b358b"`
Sep 04 08:38:23.261 INFO blam! df9009dc726a3e488db74a80a315810f2fc9341442cf8cd55789e7d6742b358b