Subject: Re: bug#13434: 24.3.50; Replying to an HTML email yields "Text is read-only"

From: Stefan Monnier <[email-masked]>
Date: Mon, 21 Jan 2013 10:42:01 -0500

> Sorry, setting debug-on-error doesn't change Emacs' behaviour.  I
> see no debugger and no backtrace.  At least, there was no buffer
> with such a name or something similar.

It's probably caught by debug-ignored-errors.
Try to additionally do M-: (setq debug-ignored-errors nil) RET before
reproducing the bug.

        Stefan