Created attachment 229230 [details]
Backtrace for the Webkit Process crash
In WebKit Nightly 528+, if any text entered into a text input, or textarea, is corrected by OSX's autocorrect, the WebKit process crashes.
This can be reproduced every time for me. Enter some text into a text field that you expect to be corrected, and as soon as the correction occurs, the WebKit process will crash. For example, typing "youre" followed by the spacebar will replace the entered text with "you're", and at this moment, WebKit crashes, with the "An error occurred with this webpage so it was reloaded" banner.
I have attached a simple reduction, a backtrace for one of the crashes, and a gif animation demonstrating the bug.
Created attachment 229231 [details]
Simple reduction containing a Text input, and a textarea.
Created attachment 229232 [details]
GIF demonstrating the crash
I had filed bug 131296 for exactly the same crash.
This was fixed a few days ago. Unfortunately, we didn't have new nightly builds available since then.
*** This bug has been marked as a duplicate of bug 131475 ***