On Wed, Oct 12, 2011 at 07:59:58PM +0200, Adam Sjøgren wrote: > Hi. > > I just reported Emacs crashing on the emacs-devel mailinglist. The gist > of it is that when I iconify Emacs and move the mouse over the icon, > Emacs crashes - but only if I compile Emacs with gtk3. With gtk2 it > doesn't crash. > > * http://article.gmane.org/gmane.emacs.devel/144994 > > The output includes "X protocol error: BadMatch (invalid parameter > attributes) on protocol request 42" which - by searching - seems to be a > problem with calling X_SetInputFocus()¹.
Right -- and that's client-specific which means if they try and call that when the window is iconfied, it won't work unless all other children have been mapped -- essentially the window it's expecting to set focus for is in the iconic state, not the normal state. The window wasn't found, and in such cases, a BadMatch is always generated. > Now, looking in Emacs' sources, it seems that Emacs don't call that > itself, rather the window manager does. No. > Which prompted me to write this email: Do you see any way that it might > be a buglet in fvwm causing this? > > My first suspects are Emacs and gtk3 of course, but I thought I'd run it > by this mailinglist as well. > > Any ideas of how to get to the bottom of this will be much appreciated. FVWM is not the cause of this from what you're telling me here. Emacs *has* to handle the case of a BadMatch in its own code, is the only thing I can think of. If it's not doing that (and do not expect me to go anywhere near the source of Emacs to look), it's already a bug. That's not to say there's something inherent in GTK3 which is also triggering this, but don't expect me to check that either. :P Oh -- ISTR your mentioning running 2.5.30 -- if this is due to Debian being out of date, you've no excuse to not upgrade to 2.6.3, and try this all again. Note that I am only-ever interested in corefiles from FVWM. Applications in the way you've described them, simply do not fall under FVWM's remit for bug-fixing. FVWM is not here to circumvent such bugs. -- Thomas Adam
