XEmacs from CVS is randomly crashing and locking up

In XEmacs 21.5 (beta1) "anise" [Lucid] (i686-pc-cygwin) of Thu May 31 2001 on MILHOUSE milhouse$ uname -a CYGWIN_NT-5.0 MILHOUSE 1.3.2(0.39/3/2) 2001-05-20 23:28 i686 unknown milhouse$ Since Ben's change to set BROKEN_SIGIO and then the changes that he checked in yesterday to fix C-g under Windows, I have been seeing random crashes and lock ups. The crashes do not produce backtraces. Below is the console output from two crashes. There is no useful output from the lockups. What more can I do to gather information about this? I updated my sources from the CVS server yesterday, if that matters. =========================================================================== milhouse$ xemacs-21.5 & [1] 1464 milhouse$ Window procedure called during GC??????? Window procedure called during GC??????? Window procedure called during GC??????? Window procedure called during GC??????? Window procedure called during GC??????? Window procedure called during GC??????? Window procedure called during GC??????? Fatal error: assertion failed, file events.h, line 496, RECORD_TYPEP (obj, lreco rd_type_event) =========================================================================== milhouse$ xemacs-21.5 & [1] 300 milhouse$ milhouse$ 0 [win] xemacs-21.5 300 sig_send: wait for sig_complete event fa iled, signal 14, rc 258, Win32 error 0 ===========================================================================