Sep 10 10:23:10.592 INFO checking safe_core-0.31.0 against try#3a2610c2a16575649896925631bf8cec4f4b1961 for pr-54090
Sep 10 10:23:10.592 INFO running: cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets
Sep 10 10:23:10.592 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54090/try#3a2610c2a16575649896925631bf8cec4f4b1961:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-4/try#3a2610c2a16575649896925631bf8cec4f4b1961:/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 +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 10:23:10.807 INFO blam! fcdcc16106b624c4f97bcf2d74f81a18e15cdb55b81043a6467ff214a786cc19
Sep 10 10:23:10.809 INFO running `"docker" "start" "-a" "fcdcc16106b624c4f97bcf2d74f81a18e15cdb55b81043a6467ff214a786cc19"`
Sep 10 10:23:12.274 INFO kablam! usermod: no changes
Sep 10 10:23:12.751 INFO kablam!     Checking cesu8 v1.1.0
Sep 10 10:23:12.751 INFO kablam!     Checking jni-sys v0.3.0
Sep 10 10:23:12.773 INFO kablam!    Compiling brotli-sys v0.3.0
Sep 10 10:23:12.773 INFO kablam!     Checking base64 v0.9.2
Sep 10 10:23:12.773 INFO kablam!    Compiling walkdir v2.0.1
Sep 10 10:23:12.773 INFO kablam!     Checking combine v2.5.2
Sep 10 10:23:12.773 INFO kablam!     Checking crossbeam-epoch v0.5.2
Sep 10 10:23:14.854 INFO kablam!     Checking tokio-io v0.1.8
Sep 10 10:23:14.858 INFO kablam!     Checking regex v0.2.11
Sep 10 10:23:15.400 INFO kablam!     Checking chrono v0.4.6
Sep 10 10:23:18.262 INFO kablam!     Checking resource_proof v0.5.0
Sep 10 10:23:18.302 INFO kablam!     Checking error-chain v0.11.0
Sep 10 10:23:18.338 INFO kablam!     Checking crossbeam-deque v0.6.1
Sep 10 10:23:19.486 INFO kablam!    Compiling jni v0.10.1
Sep 10 10:23:20.018 INFO kablam!    Compiling rust_sodium-sys v0.7.2
Sep 10 10:23:20.711 INFO kablam!     Checking log4rs v0.7.0
Sep 10 10:23:21.842 INFO kablam!     Checking tokio-threadpool v0.1.6
Sep 10 10:23:23.150 INFO kablam!     Checking tokio-reactor v0.1.5
Sep 10 10:23:25.370 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 10 10:23:25.370 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/file.rs:25:3
Sep 10 10:23:25.370 INFO kablam!    |
Sep 10 10:23:25.370 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 10 10:23:25.370 INFO kablam!    |   ^^^^^
Sep 10 10:23:25.370 INFO kablam!    |
Sep 10 10:23:25.370 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 10 10:23:25.370 INFO kablam! 
Sep 10 10:23:25.370 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 10 10:23:25.370 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/console.rs:24:3
Sep 10 10:23:25.370 INFO kablam!    |
Sep 10 10:23:25.370 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 10 10:23:25.370 INFO kablam!    |   ^^^^^
Sep 10 10:23:25.370 INFO kablam!    |
Sep 10 10:23:25.370 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 10 10:23:25.370 INFO kablam! 
Sep 10 10:23:25.370 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 10 10:23:25.370 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 10 10:23:25.370 INFO kablam!    |
Sep 10 10:23:25.370 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 10 10:23:25.370 INFO kablam!    |   ^^^^^
Sep 10 10:23:25.370 INFO kablam!    |
Sep 10 10:23:25.370 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 10 10:23:25.370 INFO kablam! 
Sep 10 10:23:25.370 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 10 10:23:25.370 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 10 10:23:25.370 INFO kablam!    |
Sep 10 10:23:25.370 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 10 10:23:25.370 INFO kablam!    |   ^^^^^
Sep 10 10:23:25.370 INFO kablam!    |
Sep 10 10:23:25.371 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 10 10:23:25.371 INFO kablam! 
Sep 10 10:23:25.371 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 10 10:23:25.371 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 10 10:23:25.371 INFO kablam!    |
Sep 10 10:23:25.371 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 10 10:23:25.371 INFO kablam!    |   ^^^^^
Sep 10 10:23:25.371 INFO kablam!    |
Sep 10 10:23:25.371 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 10 10:23:25.371 INFO kablam! 
Sep 10 10:23:25.371 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 10 10:23:25.371 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 10 10:23:25.371 INFO kablam!    |
Sep 10 10:23:25.371 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 10 10:23:25.371 INFO kablam!    |   ^^^^^
Sep 10 10:23:25.371 INFO kablam!    |
Sep 10 10:23:25.371 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 10 10:23:25.371 INFO kablam! 
Sep 10 10:23:25.371 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 10 10:23:25.371 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/mod.rs:46:3
Sep 10 10:23:25.371 INFO kablam!    |
Sep 10 10:23:25.371 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 10 10:23:25.371 INFO kablam!    |   ^^^^^
Sep 10 10:23:25.371 INFO kablam!    |
Sep 10 10:23:25.371 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 10 10:23:25.371 INFO kablam! 
Sep 10 10:23:25.886 INFO kablam! error: aborting due to 7 previous errors
Sep 10 10:23:25.890 INFO kablam! 
Sep 10 10:23:25.890 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 10 10:23:25.929 INFO kablam! error: Could not compile `log4rs`.
Sep 10 10:23:25.929 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 10 10:23:35.084 INFO kablam! error: build failed
Sep 10 10:23:35.085 INFO kablam! su: No module specific data is present
Sep 10 10:23:36.070 INFO running `"docker" "rm" "-f" "fcdcc16106b624c4f97bcf2d74f81a18e15cdb55b81043a6467ff214a786cc19"`
Sep 10 10:23:36.198 INFO blam! fcdcc16106b624c4f97bcf2d74f81a18e15cdb55b81043a6467ff214a786cc19