Sep 06 08:34:08.027 INFO checking connectr-1.0.0 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 06 08:34:08.027 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 06 08:34:08.027 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-4/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/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=1000" "-e" "CMD=cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 06 08:34:08.248 INFO blam! 641fc00d6541a71ab83a32ab9c3d4afb6ed0669eba027478f9c4356d61c578f8
Sep 06 08:34:08.250 INFO running `"docker" "start" "-a" "641fc00d6541a71ab83a32ab9c3d4afb6ed0669eba027478f9c4356d61c578f8"`
Sep 06 08:34:09.282 INFO kablam! usermod: no changes
Sep 06 08:34:09.633 INFO kablam!    Compiling rubrail v0.7.0
Sep 06 08:34:09.642 INFO kablam!    Compiling wrapped-vec v0.2.1
Sep 06 08:34:09.642 INFO kablam!     Checking mio v0.6.15
Sep 06 08:34:09.642 INFO kablam!     Checking tokio-io v0.1.8
Sep 06 08:34:09.652 INFO kablam!     Checking log v0.3.9
Sep 06 08:34:09.652 INFO kablam!     Checking want v0.0.4
Sep 06 08:34:09.652 INFO kablam!     Checking serde-value v0.5.2
Sep 06 08:34:09.652 INFO kablam!     Checking timer v0.2.0
Sep 06 08:34:10.766 INFO kablam!     Checking tokio-threadpool v0.1.6
Sep 06 08:34:12.802 INFO kablam!     Checking log4rs v0.8.0
Sep 06 08:34:14.700 INFO kablam!     Checking tokio-codec v0.1.0
Sep 06 08:34:15.130 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 06 08:34:15.130 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/file.rs:25:3
Sep 06 08:34:15.130 INFO kablam!    |
Sep 06 08:34:15.130 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 06 08:34:15.130 INFO kablam!    |   ^^^^^
Sep 06 08:34:15.130 INFO kablam!    |
Sep 06 08:34:15.130 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 08:34:15.130 INFO kablam! 
Sep 06 08:34:15.130 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 06 08:34:15.130 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/console.rs:24:3
Sep 06 08:34:15.130 INFO kablam!    |
Sep 06 08:34:15.130 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 06 08:34:15.130 INFO kablam!    |   ^^^^^
Sep 06 08:34:15.130 INFO kablam!    |
Sep 06 08:34:15.130 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 08:34:15.130 INFO kablam! 
Sep 06 08:34:15.130 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 06 08:34:15.130 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 06 08:34:15.130 INFO kablam!    |
Sep 06 08:34:15.130 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 06 08:34:15.130 INFO kablam!    |   ^^^^^
Sep 06 08:34:15.130 INFO kablam!    |
Sep 06 08:34:15.130 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 08:34:15.130 INFO kablam! 
Sep 06 08:34:15.130 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 06 08:34:15.130 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 06 08:34:15.130 INFO kablam!    |
Sep 06 08:34:15.130 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 06 08:34:15.131 INFO kablam!    |   ^^^^^
Sep 06 08:34:15.131 INFO kablam!    |
Sep 06 08:34:15.131 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 08:34:15.131 INFO kablam! 
Sep 06 08:34:15.131 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 06 08:34:15.131 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 06 08:34:15.131 INFO kablam!    |
Sep 06 08:34:15.131 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 06 08:34:15.131 INFO kablam!    |   ^^^^^
Sep 06 08:34:15.131 INFO kablam!    |
Sep 06 08:34:15.131 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 08:34:15.131 INFO kablam! 
Sep 06 08:34:15.146 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 06 08:34:15.146 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 06 08:34:15.146 INFO kablam!    |
Sep 06 08:34:15.146 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 06 08:34:15.146 INFO kablam!    |   ^^^^^
Sep 06 08:34:15.146 INFO kablam!    |
Sep 06 08:34:15.146 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 08:34:15.146 INFO kablam! 
Sep 06 08:34:15.146 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 06 08:34:15.146 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/mod.rs:46:3
Sep 06 08:34:15.146 INFO kablam!    |
Sep 06 08:34:15.146 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 06 08:34:15.146 INFO kablam!    |   ^^^^^
Sep 06 08:34:15.146 INFO kablam!    |
Sep 06 08:34:15.146 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 08:34:15.146 INFO kablam! 
Sep 06 08:34:15.260 INFO kablam! error: aborting due to 7 previous errors
Sep 06 08:34:15.260 INFO kablam! 
Sep 06 08:34:15.260 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 06 08:34:15.290 INFO kablam! error: Could not compile `log4rs`.
Sep 06 08:34:15.290 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 06 08:34:16.820 INFO kablam! error: build failed
Sep 06 08:34:16.820 INFO kablam! su: No module specific data is present
Sep 06 08:34:17.366 INFO running `"docker" "rm" "-f" "641fc00d6541a71ab83a32ab9c3d4afb6ed0669eba027478f9c4356d61c578f8"`
Sep 06 08:34:17.432 INFO blam! 641fc00d6541a71ab83a32ab9c3d4afb6ed0669eba027478f9c4356d61c578f8