On Wed, Sep 2, 2015 at 3:16 PM, Eli Zaretskii <eliz@gnu.org> wrote:

> > This patch appears, so far, to run without a segfault
>

No segfault overnight.


> Can you please verify that when the (unmodified) code does segfault,
> the offending face ID is indeed stored in
> last_escape_glyph_merged_face_id?  I'd like to be sure we have really
> found the source of that face ID.
>

It is, indeed, and last_escape_glyph_frame also equals it->f.

Revised patch attached.