Sep 01 00:14:36.667 INFO checking iot_center-0.0.1 against try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b for pr-53578
Sep 01 00:14:36.667 INFO running: cargo +a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b-alt check --frozen --all --all-targets
Sep 01 00:14:36.667 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53578/try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578/worker-0/try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b:/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 +a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 00:14:36.899 INFO blam! 202ffc768d4fa8f6dcdb10c00d6473dac928ca9f048a3f26f1591c7286798af1
Sep 01 00:14:36.901 INFO running `"docker" "start" "-a" "202ffc768d4fa8f6dcdb10c00d6473dac928ca9f048a3f26f1591c7286798af1"`
Sep 01 00:14:37.798 INFO kablam!     Checking log4rs v0.8.0
Sep 01 00:14:37.798 INFO kablam!     Checking mqtt-protocol v0.3.1
Sep 01 00:14:39.679 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 01 00:14:39.679 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/file.rs:25:3
Sep 01 00:14:39.679 INFO kablam!    |
Sep 01 00:14:39.679 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 01 00:14:39.679 INFO kablam!    |   ^^^^^
Sep 01 00:14:39.679 INFO kablam!    |
Sep 01 00:14:39.679 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 00:14:39.679 INFO kablam! 
Sep 01 00:14:39.680 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 01 00:14:39.680 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/console.rs:24:3
Sep 01 00:14:39.680 INFO kablam!    |
Sep 01 00:14:39.681 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 00:14:39.681 INFO kablam!    |   ^^^^^
Sep 01 00:14:39.681 INFO kablam!    |
Sep 01 00:14:39.681 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 00:14:39.681 INFO kablam! 
Sep 01 00:14:39.681 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 01 00:14:39.681 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 01 00:14:39.681 INFO kablam!    |
Sep 01 00:14:39.681 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 01 00:14:39.681 INFO kablam!    |   ^^^^^
Sep 01 00:14:39.681 INFO kablam!    |
Sep 01 00:14:39.681 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 00:14:39.681 INFO kablam! 
Sep 01 00:14:39.681 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 01 00:14:39.681 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 01 00:14:39.681 INFO kablam!    |
Sep 01 00:14:39.681 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 01 00:14:39.681 INFO kablam!    |   ^^^^^
Sep 01 00:14:39.681 INFO kablam!    |
Sep 01 00:14:39.681 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 00:14:39.681 INFO kablam! 
Sep 01 00:14:39.681 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 01 00:14:39.682 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 01 00:14:39.682 INFO kablam!    |
Sep 01 00:14:39.682 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 01 00:14:39.682 INFO kablam!    |   ^^^^^
Sep 01 00:14:39.682 INFO kablam!    |
Sep 01 00:14:39.682 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 00:14:39.682 INFO kablam! 
Sep 01 00:14:39.682 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 01 00:14:39.682 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 01 00:14:39.682 INFO kablam!    |
Sep 01 00:14:39.682 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 00:14:39.682 INFO kablam!    |   ^^^^^
Sep 01 00:14:39.682 INFO kablam!    |
Sep 01 00:14:39.682 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 00:14:39.682 INFO kablam! 
Sep 01 00:14:39.682 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 01 00:14:39.682 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/mod.rs:46:3
Sep 01 00:14:39.682 INFO kablam!    |
Sep 01 00:14:39.682 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 01 00:14:39.682 INFO kablam!    |   ^^^^^
Sep 01 00:14:39.683 INFO kablam!    |
Sep 01 00:14:39.683 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 00:14:39.683 INFO kablam! 
Sep 01 00:14:39.813 INFO kablam! error: aborting due to 7 previous errors
Sep 01 00:14:39.813 INFO kablam! 
Sep 01 00:14:39.813 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 01 00:14:39.821 INFO kablam! error: Could not compile `log4rs`.
Sep 01 00:14:39.821 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 01 00:14:41.127 INFO kablam! error: build failed
Sep 01 00:14:41.129 INFO kablam! su: No module specific data is present
Sep 01 00:14:41.610 INFO running `"docker" "rm" "-f" "202ffc768d4fa8f6dcdb10c00d6473dac928ca9f048a3f26f1591c7286798af1"`
Sep 01 00:14:41.717 INFO blam! 202ffc768d4fa8f6dcdb10c00d6473dac928ca9f048a3f26f1591c7286798af1