Note about rust-lang/rust#43789

Author: jonhoo

README.md

@@ -4,6 +4,9 @@
 [![Documentation](https://docs.rs/fantoccini/badge.svg)](https://docs.rs/fantoccini/)
 [![Build Status](https://travis-ci.org/jonhoo/fantoccini.svg?branch=master)](https://travis-ci.org/jonhoo/fantoccini)
 
+**Note: this crate doesn't build with the current nightly due to
+rust-lang/rust#43789.**
+
 A high-level API for programmatically interacting with web pages through WebDriver.
 
 This crate uses the [WebDriver protocol] to drive a conforming (potentially headless) browser

README.tpl

@@ -4,4 +4,7 @@
 [![Documentation](https://docs.rs/fantoccini/badge.svg)](https://docs.rs/fantoccini/)
 [![Build Status](https://travis-ci.org/jonhoo/fantoccini.svg?branch=master)](https://travis-ci.org/jonhoo/fantoccini)
 
+**Note: this crate doesn't build with the current nightly due to
+rust-lang/rust#43789.**
+
 {{readme}}