Gunnar> Adrian Aichner <aichner(a)ecf.teradyne.com&gt; writes: Gunnar> interesting. You got lucky. The GC collected function in Gunnar> function_argcount but the pointer still pointed to a valid Gunnar> LispObject (the list in the backtrace). I assume this is Gunnar> _not_ a debug build? In debug builds we try to make sure Yes, it's not. Gunnar> that collected objects are really invalid, to get a crash Gunnar> early on. Gunnar> I had fixed this by adding a GCPRO (see xemacs-patches) Gunnar> yesterday but didn't get around to mailing the patch. Gunnar> thanks for testing. Gunnar> Gunnar.