Sep 06 10:01:46.987 INFO checking amqpr-0.2.2 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 06 10:01:46.987 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 06 10:01:46.987 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 10:01:47.178 INFO blam! aac139610fd225e7ddb8192d6e06d6339333afee24cdb0b098beda07877d7762
Sep 06 10:01:47.180 INFO running `"docker" "start" "-a" "aac139610fd225e7ddb8192d6e06d6339333afee24cdb0b098beda07877d7762"`
Sep 06 10:01:48.278 INFO kablam! usermod: no changes
Sep 06 10:01:48.550 INFO kablam!     Checking ex-futures v0.4.9
Sep 06 10:01:48.565 INFO kablam!     Checking amqpr-codec v0.2.4
Sep 06 10:01:48.565 INFO kablam!     Checking log4rs v0.7.0
Sep 06 10:01:50.273 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 10:01:50.274 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/file.rs:25:3
Sep 06 10:01:50.274 INFO kablam!    |
Sep 06 10:01:50.274 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 06 10:01:50.274 INFO kablam!    |   ^^^^^
Sep 06 10:01:50.274 INFO kablam!    |
Sep 06 10:01:50.274 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 10:01:50.274 INFO kablam! 
Sep 06 10:01:50.274 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 10:01:50.274 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/console.rs:24:3
Sep 06 10:01:50.274 INFO kablam!    |
Sep 06 10:01:50.274 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 06 10:01:50.274 INFO kablam!    |   ^^^^^
Sep 06 10:01:50.274 INFO kablam!    |
Sep 06 10:01:50.274 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 10:01:50.274 INFO kablam! 
Sep 06 10:01:50.275 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 10:01:50.275 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/roll/delete.rs:16:3
Sep 06 10:01:50.275 INFO kablam!    |
Sep 06 10:01:50.275 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 06 10:01:50.275 INFO kablam!    |   ^^^^^
Sep 06 10:01:50.275 INFO kablam!    |
Sep 06 10:01:50.275 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 10:01:50.275 INFO kablam! 
Sep 06 10:01:50.275 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 10:01:50.275 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/roll/fixed_window.rs:17:3
Sep 06 10:01:50.275 INFO kablam!    |
Sep 06 10:01:50.275 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 06 10:01:50.275 INFO kablam!    |   ^^^^^
Sep 06 10:01:50.275 INFO kablam!    |
Sep 06 10:01:50.275 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 10:01:50.275 INFO kablam! 
Sep 06 10:01:50.276 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 10:01:50.276 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/trigger/size.rs:21:3
Sep 06 10:01:50.276 INFO kablam!    |
Sep 06 10:01:50.276 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 06 10:01:50.276 INFO kablam!    |   ^^^^^
Sep 06 10:01:50.276 INFO kablam!    |
Sep 06 10:01:50.277 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 10:01:50.277 INFO kablam! 
Sep 06 10:01:50.282 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 10:01:50.282 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 06 10:01:50.282 INFO kablam!    |
Sep 06 10:01:50.282 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 06 10:01:50.282 INFO kablam!    |   ^^^^^
Sep 06 10:01:50.286 INFO kablam!    |
Sep 06 10:01:50.286 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 10:01:50.286 INFO kablam! 
Sep 06 10:01:50.286 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 10:01:50.286 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/mod.rs:46:3
Sep 06 10:01:50.286 INFO kablam!    |
Sep 06 10:01:50.286 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 06 10:01:50.286 INFO kablam!    |   ^^^^^
Sep 06 10:01:50.286 INFO kablam!    |
Sep 06 10:01:50.286 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 10:01:50.286 INFO kablam! 
Sep 06 10:01:50.338 INFO kablam! error: aborting due to 7 previous errors
Sep 06 10:01:50.338 INFO kablam! 
Sep 06 10:01:50.338 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 06 10:01:50.358 INFO kablam! error: Could not compile `log4rs`.
Sep 06 10:01:50.358 INFO kablam! 
Sep 06 10:01:50.358 INFO kablam! To learn more, run the command again with --verbose.
Sep 06 10:01:50.359 INFO kablam! su: No module specific data is present
Sep 06 10:01:51.031 INFO running `"docker" "rm" "-f" "aac139610fd225e7ddb8192d6e06d6339333afee24cdb0b098beda07877d7762"`
Sep 06 10:01:51.147 INFO blam! aac139610fd225e7ddb8192d6e06d6339333afee24cdb0b098beda07877d7762