Antoine Pitrou <pit...@free.fr> added the comment: The "UpdateStringProc should not be invoked for type cmdName" message (as quoted above in the traceback) apparently can mean that there's a mismanagement of Tcl reference counts.
>From >http://sourceforge.net/tracker/?func=detail&atid=110894&aid=1326087&group_id=10894: “This crash (actually, a panic) hints at defective Tcl_Obj handling - possibly in the core, more likely in an extension if you're using one. It indicates that Tcl_GetString() or Tcl_GetStringFromObj() has been called on a cmdNameType Tcl_Obj that has no string representation, a state that should never occur.” Intuitively, cmdNameType seems to refer to createcommand() / deletecommand(). Also, the following code in Tkinter.py looks a bit suspicious: def after(self, ms, func=None, *args): """Call function once after given time. MS specifies the time in milliseconds. FUNC gives the function which shall be called. Additional parameters are given as parameters to the function call. Return identifier to cancel scheduling with after_cancel.""" if not func: # I'd rather use time.sleep(ms*0.001) self.tk.call('after', ms) else: def callit(): try: func(*args) finally: try: self.deletecommand(name) except TclError: pass name = self._register(callit) return self.tk.call('after', ms, name) That is, we call deletecommand() while the command is still being executed. Perhaps that, together with concurrent memory allocation from another thread (Tcl_Alloc() doesn't use Python's "Tcl lock"), might explain why the cmdName or other things sometimes become corrupted ("Tcl_DeleteCommand deletes a command from a command interpreter. Once the call completes, attempts to invoke cmdName in interp will result in errors"). ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue11077> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
