Sep 02 00:56:01.414 INFO checking safe_core-0.31.0 against try#952c7dbfa2628309f557b367929ffc17af20b332 for pr-53851
Sep 02 00:56:01.414 INFO running: cargo +952c7dbfa2628309f557b367929ffc17af20b332-alt check --frozen --all --all-targets
Sep 02 00:56:01.414 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53851/try#952c7dbfa2628309f557b367929ffc17af20b332:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53851/worker-2/try#952c7dbfa2628309f557b367929ffc17af20b332:/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 +952c7dbfa2628309f557b367929ffc17af20b332-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 02 00:56:01.626 INFO blam! a4edc936857e0eba5f98b3fb7623d712b45098f37a0b4f6b473e6be3ce7a31ba
Sep 02 00:56:01.628 INFO running `"docker" "start" "-a" "a4edc936857e0eba5f98b3fb7623d712b45098f37a0b4f6b473e6be3ce7a31ba"`
Sep 02 00:56:03.435 INFO kablam!     Checking jni-sys v0.3.0
Sep 02 00:56:03.445 INFO kablam!    Compiling brotli-sys v0.3.0
Sep 02 00:56:03.476 INFO kablam!    Compiling walkdir v2.0.1
Sep 02 00:56:03.476 INFO kablam!     Checking base64 v0.9.2
Sep 02 00:56:03.479 INFO kablam!     Checking combine v2.5.2
Sep 02 00:56:03.506 INFO kablam!     Checking crossbeam-epoch v0.5.2
Sep 02 00:56:03.508 INFO kablam!     Checking tokio-io v0.1.8
Sep 02 00:56:05.475 INFO kablam!     Checking regex v0.2.11
Sep 02 00:56:07.127 INFO kablam!    Compiling miniz_oxide_c_api v0.1.3
Sep 02 00:56:08.203 INFO kablam!     Checking resource_proof v0.5.0
Sep 02 00:56:08.511 INFO kablam!     Checking ws v0.7.3
Sep 02 00:56:09.157 INFO kablam!     Checking hyper v0.10.13
Sep 02 00:56:14.862 INFO kablam!     Checking crossbeam-deque v0.6.1
Sep 02 00:56:14.862 INFO kablam!     Checking tokio-reactor v0.1.5
Sep 02 00:56:15.047 INFO kablam!     Checking tokio-codec v0.1.0
Sep 02 00:56:18.952 INFO kablam!    Compiling jni v0.10.1
Sep 02 00:56:19.645 INFO kablam!    Compiling flate2 v1.0.2
Sep 02 00:56:22.837 INFO kablam!     Checking log4rs v0.7.0
Sep 02 00:56:24.503 INFO kablam!     Checking tokio-threadpool v0.1.6
Sep 02 00:56:26.277 INFO kablam!     Checking tokio-udp v0.1.2
Sep 02 00:56:26.360 INFO kablam!     Checking tokio-uds v0.2.1
Sep 02 00:56:28.419 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 02 00:56:28.419 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/file.rs:25:3
Sep 02 00:56:28.419 INFO kablam!    |
Sep 02 00:56:28.419 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 02 00:56:28.419 INFO kablam!    |   ^^^^^
Sep 02 00:56:28.419 INFO kablam!    |
Sep 02 00:56:28.419 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 00:56:28.419 INFO kablam! 
Sep 02 00:56:28.419 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 02 00:56:28.419 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/console.rs:24:3
Sep 02 00:56:28.419 INFO kablam!    |
Sep 02 00:56:28.419 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 02 00:56:28.419 INFO kablam!    |   ^^^^^
Sep 02 00:56:28.419 INFO kablam!    |
Sep 02 00:56:28.419 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 00:56:28.419 INFO kablam! 
Sep 02 00:56:28.420 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 02 00:56:28.420 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 02 00:56:28.420 INFO kablam!    |
Sep 02 00:56:28.420 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 02 00:56:28.420 INFO kablam!    |   ^^^^^
Sep 02 00:56:28.420 INFO kablam!    |
Sep 02 00:56:28.420 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 00:56:28.420 INFO kablam! 
Sep 02 00:56:28.420 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 02 00:56:28.420 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 02 00:56:28.420 INFO kablam!    |
Sep 02 00:56:28.420 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 02 00:56:28.420 INFO kablam!    |   ^^^^^
Sep 02 00:56:28.420 INFO kablam!    |
Sep 02 00:56:28.420 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 00:56:28.420 INFO kablam! 
Sep 02 00:56:28.420 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 02 00:56:28.420 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 02 00:56:28.421 INFO kablam!    |
Sep 02 00:56:28.421 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 02 00:56:28.421 INFO kablam!    |   ^^^^^
Sep 02 00:56:28.421 INFO kablam!    |
Sep 02 00:56:28.421 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 00:56:28.421 INFO kablam! 
Sep 02 00:56:28.421 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 02 00:56:28.421 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 02 00:56:28.421 INFO kablam!    |
Sep 02 00:56:28.421 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 02 00:56:28.421 INFO kablam!    |   ^^^^^
Sep 02 00:56:28.421 INFO kablam!    |
Sep 02 00:56:28.421 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 00:56:28.421 INFO kablam! 
Sep 02 00:56:28.422 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 02 00:56:28.422 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/mod.rs:46:3
Sep 02 00:56:28.422 INFO kablam!    |
Sep 02 00:56:28.422 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 02 00:56:28.422 INFO kablam!    |   ^^^^^
Sep 02 00:56:28.422 INFO kablam!    |
Sep 02 00:56:28.422 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 00:56:28.422 INFO kablam! 
Sep 02 00:56:28.998 INFO kablam! error: aborting due to 7 previous errors
Sep 02 00:56:29.026 INFO kablam! 
Sep 02 00:56:29.027 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 02 00:56:29.061 INFO kablam! error: Could not compile `log4rs`.
Sep 02 00:56:29.061 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 02 00:56:36.520 INFO kablam! error: build failed
Sep 02 00:56:36.523 INFO kablam! su: No module specific data is present
Sep 02 00:56:37.039 INFO running `"docker" "rm" "-f" "a4edc936857e0eba5f98b3fb7623d712b45098f37a0b4f6b473e6be3ce7a31ba"`
Sep 02 00:56:37.206 INFO blam! a4edc936857e0eba5f98b3fb7623d712b45098f37a0b4f6b473e6be3ce7a31ba