Sep 01 07:36:17.172 INFO checking safe_core-0.31.0 against try#aa245a5862056b681d2ccdb178f58891108cd3a6 for pr-53831
Sep 01 07:36:17.172 INFO running: cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets
Sep 01 07:36:17.172 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53831/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-3/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 07:36:17.338 INFO blam! 4bd9522e70b36d0e9e9a374398ec594c62e61dda3ad647a7f1b4892ea3354229
Sep 01 07:36:17.340 INFO running `"docker" "start" "-a" "4bd9522e70b36d0e9e9a374398ec594c62e61dda3ad647a7f1b4892ea3354229"`
Sep 01 07:36:18.307 INFO kablam!    Compiling podio v0.1.6
Sep 01 07:36:18.313 INFO kablam!    Compiling unwrap v1.1.0
Sep 01 07:36:18.315 INFO kablam!     Checking jni-sys v0.3.0
Sep 01 07:36:18.316 INFO kablam!     Checking cesu8 v1.1.0
Sep 01 07:36:18.316 INFO kablam!     Checking tiny-keccak v1.3.1
Sep 01 07:36:18.316 INFO kablam!     Checking lru_time_cache v0.7.0
Sep 01 07:36:18.316 INFO kablam!     Checking fake_clock v0.2.0
Sep 01 07:36:18.317 INFO kablam!    Compiling miniz_oxide v0.1.3
Sep 01 07:36:19.994 INFO kablam!     Checking atty v0.2.2
Sep 01 07:36:20.142 INFO kablam!     Checking termion v1.4.0
Sep 01 07:36:20.267 INFO kablam!     Checking thread_local v0.3.6
Sep 01 07:36:20.342 INFO kablam!    Compiling brotli-sys v0.3.0
Sep 01 07:36:20.679 INFO kablam!    Compiling walkdir v2.0.1
Sep 01 07:36:20.974 INFO kablam!     Checking base64 v0.9.2
Sep 01 07:36:21.268 INFO kablam!     Checking combine v2.5.2
Sep 01 07:36:23.237 INFO kablam!    Compiling msdos_time v0.1.6
Sep 01 07:36:24.583 INFO kablam!     Checking crossbeam-epoch v0.5.2
Sep 01 07:36:24.645 INFO kablam!     Checking bytes v0.4.9
Sep 01 07:36:24.700 INFO kablam!     Checking textwrap v0.6.0
Sep 01 07:36:27.769 INFO kablam!    Compiling bzip2-sys v0.1.6
Sep 01 07:36:27.906 INFO kablam!     Checking regex v0.2.11
Sep 01 07:36:30.905 INFO kablam!     Checking clap v2.25.1
Sep 01 07:36:30.937 INFO kablam!     Checking url v1.5.1
Sep 01 07:36:31.004 INFO kablam!    Compiling jni v0.10.1
Sep 01 07:36:31.106 INFO kablam!     Checking bincode v0.8.0
Sep 01 07:36:33.942 INFO kablam!    Compiling bzip2 v0.3.3
Sep 01 07:36:34.506 INFO kablam!     Checking crossbeam-deque v0.6.1
Sep 01 07:36:37.412 INFO kablam!     Checking config_file_handler v0.9.0
Sep 01 07:36:38.542 INFO kablam!    Compiling miniz_oxide_c_api v0.1.3
Sep 01 07:36:38.839 INFO kablam!     Checking tokio-io v0.1.8
Sep 01 07:36:41.732 INFO kablam!     Checking tokio-threadpool v0.1.6
Sep 01 07:36:43.150 INFO kablam!     Checking hyper v0.10.13
Sep 01 07:36:46.672 INFO kablam!     Checking ws v0.7.3
Sep 01 07:36:47.045 INFO kablam!     Checking log4rs v0.7.0
Sep 01 07:36:48.130 INFO kablam!    Compiling flate2 v1.0.2
Sep 01 07:36:48.619 INFO kablam!     Checking tokio-reactor v0.1.5
Sep 01 07:36:52.308 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 07:36:52.308 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/file.rs:25:3
Sep 01 07:36:52.308 INFO kablam!    |
Sep 01 07:36:52.308 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 01 07:36:52.308 INFO kablam!    |   ^^^^^
Sep 01 07:36:52.308 INFO kablam!    |
Sep 01 07:36:52.308 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:36:52.308 INFO kablam! 
Sep 01 07:36:52.309 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 07:36:52.309 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/console.rs:24:3
Sep 01 07:36:52.309 INFO kablam!    |
Sep 01 07:36:52.309 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 07:36:52.309 INFO kablam!    |   ^^^^^
Sep 01 07:36:52.309 INFO kablam!    |
Sep 01 07:36:52.309 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:36:52.309 INFO kablam! 
Sep 01 07:36:52.309 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 07:36:52.309 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 01 07:36:52.309 INFO kablam!    |
Sep 01 07:36:52.309 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 01 07:36:52.309 INFO kablam!    |   ^^^^^
Sep 01 07:36:52.309 INFO kablam!    |
Sep 01 07:36:52.309 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:36:52.309 INFO kablam! 
Sep 01 07:36:52.309 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 07:36:52.309 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 01 07:36:52.309 INFO kablam!    |
Sep 01 07:36:52.309 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 01 07:36:52.309 INFO kablam!    |   ^^^^^
Sep 01 07:36:52.309 INFO kablam!    |
Sep 01 07:36:52.309 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:36:52.309 INFO kablam! 
Sep 01 07:36:52.309 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 07:36:52.310 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 01 07:36:52.310 INFO kablam!    |
Sep 01 07:36:52.310 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 01 07:36:52.310 INFO kablam!    |   ^^^^^
Sep 01 07:36:52.320 INFO kablam!    |
Sep 01 07:36:52.321 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:36:52.321 INFO kablam! 
Sep 01 07:36:52.321 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 07:36:52.321 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 01 07:36:52.321 INFO kablam!    |
Sep 01 07:36:52.321 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 07:36:52.321 INFO kablam!    |   ^^^^^
Sep 01 07:36:52.321 INFO kablam!    |
Sep 01 07:36:52.321 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:36:52.321 INFO kablam! 
Sep 01 07:36:52.322 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 07:36:52.322 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/mod.rs:46:3
Sep 01 07:36:52.322 INFO kablam!    |
Sep 01 07:36:52.322 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 01 07:36:52.322 INFO kablam!    |   ^^^^^
Sep 01 07:36:52.322 INFO kablam!    |
Sep 01 07:36:52.322 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 07:36:52.322 INFO kablam! 
Sep 01 07:36:52.867 INFO kablam! error: aborting due to 7 previous errors
Sep 01 07:36:52.867 INFO kablam! 
Sep 01 07:36:52.867 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 01 07:36:52.901 INFO kablam! error: Could not compile `log4rs`.
Sep 01 07:36:52.901 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 01 07:37:03.698 INFO kablam! error: build failed
Sep 01 07:37:03.702 INFO kablam! su: No module specific data is present
Sep 01 07:37:04.250 INFO running `"docker" "rm" "-f" "4bd9522e70b36d0e9e9a374398ec594c62e61dda3ad647a7f1b4892ea3354229"`
Sep 01 07:37:04.412 INFO blam! 4bd9522e70b36d0e9e9a374398ec594c62e61dda3ad647a7f1b4892ea3354229