Sep 04 08:38:16.203 INFO checking rubrail-0.7.0 against master#2687112ea6a8701cbf36e6dd4d77d64694cf93d8 for pr-53913
Sep 04 08:38:16.203 INFO running: cargo +2687112ea6a8701cbf36e6dd4d77d64694cf93d8-alt check --frozen --all --all-targets
Sep 04 08:38:16.203 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53913/master#2687112ea6a8701cbf36e6dd4d77d64694cf93d8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53913/worker-2/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 08:38:16.360 INFO blam! 5bc36336b88a57c6b328c54335dc459926b8cf8dce3f051e9cf443f4acd7ae40
Sep 04 08:38:16.361 INFO running `"docker" "start" "-a" "5bc36336b88a57c6b328c54335dc459926b8cf8dce3f051e9cf443f4acd7ae40"`
Sep 04 08:38:16.983 INFO kablam!    Compiling rubrail v0.7.0 (file:///source)
Sep 04 08:38:16.986 INFO kablam!     Checking log v0.4.5
Sep 04 08:38:17.856 INFO kablam!     Checking log4rs v0.8.0
Sep 04 08:38:18.809 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 08:38:18.809 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/file.rs:25:3
Sep 04 08:38:18.809 INFO kablam!    |
Sep 04 08:38:18.809 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 04 08:38:18.809 INFO kablam!    |   ^^^^^
Sep 04 08:38:18.809 INFO kablam!    |
Sep 04 08:38:18.810 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 08:38:18.810 INFO kablam! 
Sep 04 08:38:18.810 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 08:38:18.810 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/console.rs:24:3
Sep 04 08:38:18.810 INFO kablam!    |
Sep 04 08:38:18.810 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 04 08:38:18.810 INFO kablam!    |   ^^^^^
Sep 04 08:38:18.810 INFO kablam!    |
Sep 04 08:38:18.810 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 08:38:18.810 INFO kablam! 
Sep 04 08:38:18.810 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 08:38:18.810 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 04 08:38:18.810 INFO kablam!    |
Sep 04 08:38:18.810 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 04 08:38:18.810 INFO kablam!    |   ^^^^^
Sep 04 08:38:18.810 INFO kablam!    |
Sep 04 08:38:18.810 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 08:38:18.810 INFO kablam! 
Sep 04 08:38:18.810 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 08:38:18.810 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 04 08:38:18.810 INFO kablam!    |
Sep 04 08:38:18.810 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 04 08:38:18.810 INFO kablam!    |   ^^^^^
Sep 04 08:38:18.810 INFO kablam!    |
Sep 04 08:38:18.810 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 08:38:18.810 INFO kablam! 
Sep 04 08:38:18.810 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 08:38:18.810 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 04 08:38:18.810 INFO kablam!    |
Sep 04 08:38:18.810 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 04 08:38:18.810 INFO kablam!    |   ^^^^^
Sep 04 08:38:18.810 INFO kablam!    |
Sep 04 08:38:18.811 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 08:38:18.811 INFO kablam! 
Sep 04 08:38:18.811 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 08:38:18.811 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 04 08:38:18.811 INFO kablam!    |
Sep 04 08:38:18.811 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 04 08:38:18.811 INFO kablam!    |   ^^^^^
Sep 04 08:38:18.811 INFO kablam!    |
Sep 04 08:38:18.811 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 08:38:18.811 INFO kablam! 
Sep 04 08:38:18.811 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 08:38:18.811 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/mod.rs:46:3
Sep 04 08:38:18.811 INFO kablam!    |
Sep 04 08:38:18.811 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 04 08:38:18.811 INFO kablam!    |   ^^^^^
Sep 04 08:38:18.811 INFO kablam!    |
Sep 04 08:38:18.811 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 08:38:18.811 INFO kablam! 
Sep 04 08:38:18.891 INFO kablam! error: aborting due to 7 previous errors
Sep 04 08:38:18.891 INFO kablam! 
Sep 04 08:38:18.891 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 04 08:38:18.904 INFO kablam! error: Could not compile `log4rs`.
Sep 04 08:38:18.904 INFO kablam! 
Sep 04 08:38:18.904 INFO kablam! To learn more, run the command again with --verbose.
Sep 04 08:38:18.906 INFO kablam! su: No module specific data is present
Sep 04 08:38:19.447 INFO running `"docker" "rm" "-f" "5bc36336b88a57c6b328c54335dc459926b8cf8dce3f051e9cf443f4acd7ae40"`
Sep 04 08:38:19.527 INFO blam! 5bc36336b88a57c6b328c54335dc459926b8cf8dce3f051e9cf443f4acd7ae40