bug#19660: Acknowledgement (24.4.51; Crash in draw_row_fringe_bitmaps)

[Jan D.]

Eli Zaretskii skrev den 2015-01-26 10:31:
> > Date: Mon, 26 Jan 2015 10:12:35 +0100
> > From: "Jan D." <jan.h.d@swipnet.se>
> > CC: 19660@debbugs.gnu.org, "Kim F. Storm" <storm@cua.dk>
> >
> > > If no other information emerges, my suggestion would be to remove the
> > > assertion on master, and see if we get any bug reports.
> >
> > No need for that, the NS version crashes later on if I remove that
> > assert.
>
> Where does it crash, and why?  Another similar assertion or something
> else?

Entering the GUI event loop, while in the event loop already.  There is 
an assertion for that on NS.

> > Better block input too much than to seldom I guess.
>
> Right.  But understanding why this happens is better yet ;-)
>
> Seriously: I thought we aren't supposed to be hit by this stuff, since
> we now never run code out of an interrupt handler.  I guess I missed
> something important.

I suspect doing unblock_input can enter the GUI event loop 
unconditionally if there is input pending.  This might be wrong in some 
situations.  Do we actually need block/unblock_input anymore?

> > Unfortunately I managed to loose my .desktop that consistently triggered
> > the error, so I can't investigate further.
>
> Don't you have a backup of that somewhere?

Yes, but it does not crash anymore.  It was probably timing related also 
as GUI events seems to be involved.

        Jan D.