Index: frame.c
===================================================================
RCS file: /cvs/src/src/gdb/frame.c,v
retrieving revision 1.191
diff -u -p -r1.191 frame.c
--- frame.c	1 Sep 2004 14:13:33 -0000	1.191
+++ frame.c	26 Oct 2004 21:13:18 -0000
@@ -1036,14 +1036,20 @@ get_prev_frame_1 (struct frame_info *thi
   if (this_frame->next->level >= 0
       && this_frame->next->unwind->type != SIGTRAMP_FRAME
       && frame_id_inner (this_id, get_frame_id (this_frame->next)))
-    error ("Previous frame inner to this frame (corrupt stack?)");
+    {
+      warning ("Previous frame inner to this frame (corrupt stack?)");
+      return NULL;
+    }
 
   /* Check that this and the next frame are not identical.  If they
      are, there is most likely a stack cycle.  As with the inner-than
      test above, avoid comparing the inner-most and sentinel frames.  */
   if (this_frame->level > 0
       && frame_id_eq (this_id, get_frame_id (this_frame->next)))
-    error ("Previous frame identical to this frame (corrupt stack?)");
+    {
+      warning ("Previous frame identical to this frame (corrupt stack?)");
+      return NULL;
+    }
 
   /* Allocate the new frame but do not wire it in to the frame chain.
      Some (bad) code in INIT_FRAME_EXTRA_INFO tries to look along
@@ -1199,7 +1205,8 @@ get_prev_frame (struct frame_info *this_
 
   if (this_frame->level > backtrace_limit)
     {
-      error ("Backtrace limit of %d exceeded", backtrace_limit);
+      warning ("Backtrace limit of %d exceeded", backtrace_limit);
+      return NULL;
     }
 
   /* If we're already inside the entry function for the main objfile,