capnp 0.0.21

# rustc version
rustc 1.12.0-nightly (54c0dcfd6 2016-07-28)
# docs.rs version
cratesfyi 0.2.0 (5dbd676 2016-07-30)

# build log
thread 'rustc' panicked at 'phase_2_configure_and_expand aborted in rustdoc!: 4', ../src/libcore/result.rs:788
note: Run with `RUST_BACKTRACE=1` for a backtrace.

Updating registry `https://github.com/rust-lang/crates.io-index`
Downloading capnp v0.0.21
Documenting capnp v0.0.21
Running `rustdoc .cargo/registry/src/github.com-1ecc6299db9ec823/capnp-0.0.21/src/capnp/lib.rs --crate-name capnp -o /home/cratesfyi/capnp-0.0.21/doc -L dependency=/home/cratesfyi/capnp-0.0.21/debug -L dependency=/home/cratesfyi/capnp-0.0.21/debug/deps`
.cargo/registry/src/github.com-1ecc6299db9ec823/capnp-0.0.21/src/capnp/list.rs:216:5: 216:22 error: The attribute `old_impl_check` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642) 
.cargo/registry/src/github.com-1ecc6299db9ec823/capnp-0.0.21/src/capnp/list.rs:216     #[old_impl_check]
^~~~~~~~~~~~~~~~~
.cargo/registry/src/github.com-1ecc6299db9ec823/capnp-0.0.21/src/capnp/list.rs:216:5: 216:22 help: add #![feature(custom_attribute)] to the crate attributes to enable 
.cargo/registry/src/github.com-1ecc6299db9ec823/capnp-0.0.21/src/capnp/list.rs:260:5: 260:22 error: The attribute `old_impl_check` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642) 
.cargo/registry/src/github.com-1ecc6299db9ec823/capnp-0.0.21/src/capnp/list.rs:260     #[old_impl_check]
^~~~~~~~~~~~~~~~~
.cargo/registry/src/github.com-1ecc6299db9ec823/capnp-0.0.21/src/capnp/list.rs:260:5: 260:22 help: add #![feature(custom_attribute)] to the crate attributes to enable 
.cargo/registry/src/github.com-1ecc6299db9ec823/capnp-0.0.21/src/capnp/list.rs:351:5: 351:22 error: The attribute `old_impl_check` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642) 
.cargo/registry/src/github.com-1ecc6299db9ec823/capnp-0.0.21/src/capnp/list.rs:351     #[old_impl_check]
^~~~~~~~~~~~~~~~~
.cargo/registry/src/github.com-1ecc6299db9ec823/capnp-0.0.21/src/capnp/list.rs:351:5: 351:22 help: add #![feature(custom_attribute)] to the crate attributes to enable 
.cargo/registry/src/github.com-1ecc6299db9ec823/capnp-0.0.21/src/capnp/message.rs:245:1: 245:21 error: The attribute `unsafe_destructor` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642) 
.cargo/registry/src/github.com-1ecc6299db9ec823/capnp-0.0.21/src/capnp/message.rs:245 #[unsafe_destructor]
^~~~~~~~~~~~~~~~~~~~
.cargo/registry/src/github.com-1ecc6299db9ec823/capnp-0.0.21/src/capnp/message.rs:245:1: 245:21 help: add #![feature(custom_attribute)] to the crate attributes to enable 
error: internal compiler error: unexpected panic 
note: the compiler unexpectedly panicked. this is a bug. 
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports 
thread 'main' panicked at 'ChainedError {
error: failed to compile `capnp v0.0.21`, intermediate artifacts can be found at `/home/cratesfyi/capnp-0.0.21`,
cause: ChainedError {
error: Could not document `capnp`.,
cause: Process didn't exit successfully: `rustdoc .cargo/registry/src/github.com-1ecc6299db9ec823/capnp-0.0.21/src/capnp/lib.rs --crate-name capnp -o /home/cratesfyi/capnp-0.0.21/doc -L dependency=/home/cratesfyi/capnp-0.0.21/debug -L dependency=/home/cratesfyi/capnp-0.0.21/debug/deps` (exit code: 101)
}
}', src/bin/cratesfyi.rs:119
note: Run with `RUST_BACKTRACE=1` for a backtrace.