This should fix the error  with glib.  An error message will still be
printed, but a default backtrace will occur in this case.

--

Index: gdb-7.12.50.20170226/gdb/python/py-framefilter.c
===================================================================
--- gdb-7.12.50.20170226.orig/gdb/python/py-framefilter.c	2017-02-26 21:33:23.150618708 +0100
+++ gdb-7.12.50.20170226/gdb/python/py-framefilter.c	2017-02-26 21:33:29.993667179 +0100
@@ -1388,6 +1388,7 @@
 				       htab_eq_pointer,
 				       NULL));
 
+  int count_printed = 0;
   while (true)
     {
       gdbpy_ref<> item (PyIter_Next (iterable.get ()));
@@ -1397,7 +1398,7 @@
 	  if (PyErr_Occurred ())
 	    {
 	      gdbpy_print_stack ();
-	      return EXT_LANG_BT_ERROR;
+	      return count_printed > 0 ? EXT_LANG_BT_ERROR : EXT_LANG_BT_NO_FILTERS;
 	    }
 	  break;
 	}
@@ -1409,6 +1410,7 @@
 	 error and continue with other frames.  */
       if (success == EXT_LANG_BT_ERROR)
 	gdbpy_print_stack ();
+      count_printed++;
     }
 
   return success;