Sep 01 07:26:41.455 INFO checking scavenger-1.0.0 against try#aa245a5862056b681d2ccdb178f58891108cd3a6 for pr-53831
Sep 01 07:26:41.455 INFO running: cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets
Sep 01 07:26:41.455 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53831/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-2/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/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 +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 07:26:41.782 INFO blam! d0dd7146f7c132036ac0a4eafc617466d6d2169a5bb49d85f563cf341c39b508
Sep 01 07:26:41.784 INFO running `"docker" "start" "-a" "d0dd7146f7c132036ac0a4eafc617466d6d2169a5bb49d85f563cf341c39b508"`
Sep 01 07:26:42.994 INFO kablam!    Compiling sys-info v0.5.6
Sep 01 07:26:42.995 INFO kablam!    Compiling scavenger v1.0.0 (file:///source)
Sep 01 07:26:42.995 INFO kablam!     Checking core_affinity v0.5.9
Sep 01 07:26:43.029 INFO kablam!     Checking clap v2.30.0
Sep 01 07:26:43.029 INFO kablam!     Checking log v0.4.4
Sep 01 07:26:43.038 INFO kablam!     Checking ct-logs v0.4.0
Sep 01 07:26:43.038 INFO kablam!     Checking stopwatch v0.0.7
Sep 01 07:26:46.428 INFO kablam!     Checking mio v0.6.15
Sep 01 07:26:46.432 INFO kablam!     Checking tokio-io v0.1.8
Sep 01 07:26:46.434 INFO kablam!     Checking tokio-threadpool v0.1.6
Sep 01 07:26:46.436 INFO kablam!     Checking rustls v0.13.1
Sep 01 07:26:46.438 INFO kablam!     Checking want v0.0.6
Sep 01 07:26:46.438 INFO kablam!     Checking log4rs v0.8.0
Sep 01 07:26:51.429 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 07:26:51.429 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/file.rs:25:3
Sep 01 07:26:51.429 INFO kablam!    |
Sep 01 07:26:51.429 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 01 07:26:51.429 INFO kablam!    |   ^^^^^
Sep 01 07:26:51.429 INFO kablam!    |
Sep 01 07:26:51.429 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:26:51.430 INFO kablam! 
Sep 01 07:26:51.430 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 07:26:51.430 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/console.rs:24:3
Sep 01 07:26:51.430 INFO kablam!    |
Sep 01 07:26:51.430 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 07:26:51.430 INFO kablam!    |   ^^^^^
Sep 01 07:26:51.430 INFO kablam!    |
Sep 01 07:26:51.430 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:26:51.430 INFO kablam! 
Sep 01 07:26:51.430 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 07:26:51.430 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 07:26:51.430 INFO kablam!    |
Sep 01 07:26:51.430 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 01 07:26:51.430 INFO kablam!    |   ^^^^^
Sep 01 07:26:51.430 INFO kablam!    |
Sep 01 07:26:51.430 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:26:51.430 INFO kablam! 
Sep 01 07:26:51.431 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 07:26:51.431 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 07:26:51.431 INFO kablam!    |
Sep 01 07:26:51.431 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 01 07:26:51.431 INFO kablam!    |   ^^^^^
Sep 01 07:26:51.431 INFO kablam!    |
Sep 01 07:26:51.431 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:26:51.431 INFO kablam! 
Sep 01 07:26:51.431 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 07:26:51.431 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 07:26:51.431 INFO kablam!    |
Sep 01 07:26:51.431 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 01 07:26:51.431 INFO kablam!    |   ^^^^^
Sep 01 07:26:51.431 INFO kablam!    |
Sep 01 07:26:51.431 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:26:51.431 INFO kablam! 
Sep 01 07:26:51.431 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 07:26:51.431 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 07:26:51.431 INFO kablam!    |
Sep 01 07:26:51.432 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 07:26:51.432 INFO kablam!    |   ^^^^^
Sep 01 07:26:51.432 INFO kablam!    |
Sep 01 07:26:51.432 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:26:51.432 INFO kablam! 
Sep 01 07:26:51.432 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 07:26:51.432 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/mod.rs:46:3
Sep 01 07:26:51.432 INFO kablam!    |
Sep 01 07:26:51.432 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 01 07:26:51.432 INFO kablam!    |   ^^^^^
Sep 01 07:26:51.444 INFO kablam!    |
Sep 01 07:26:51.445 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:26:51.445 INFO kablam! 
Sep 01 07:26:51.861 INFO kablam! error: aborting due to 7 previous errors
Sep 01 07:26:51.868 INFO kablam! 
Sep 01 07:26:51.868 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 01 07:26:51.885 INFO kablam! error: Could not compile `log4rs`.
Sep 01 07:26:51.885 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 01 07:27:01.631 INFO kablam! error: build failed
Sep 01 07:27:01.642 INFO kablam! su: No module specific data is present
Sep 01 07:27:02.195 INFO running `"docker" "rm" "-f" "d0dd7146f7c132036ac0a4eafc617466d6d2169a5bb49d85f563cf341c39b508"`
Sep 01 07:27:02.326 INFO blam! d0dd7146f7c132036ac0a4eafc617466d6d2169a5bb49d85f563cf341c39b508