# HG changeset patch
# User Rik <rik@octave.org>
# Date 1400167013 25200
# Node ID fc43c8017e9ba4e4b166ed9f0338af5d2f1db487
# Parent  5f37573a6868ea2136a244720b6474d4c1c91bb3
Fix infinite loop when using builtin ("keyboard") (bug #33296).

* toplev.cc (octave_call_stack::do_goto_frame_relative): If call stack
increment is 0 (not dbup, nor dbdown, but keyboard function), choose an
increment of -1 to eventially break out of while (1) loop.

diff -r 5f37573a6868 -r fc43c8017e9b libinterp/corefcn/toplev.cc
--- a/libinterp/corefcn/toplev.cc	Wed May 14 20:29:06 2014 -0700
+++ b/libinterp/corefcn/toplev.cc	Thu May 15 08:16:53 2014 -0700
@@ -446,6 +446,8 @@
               break;
             }
         }
+      else if (incr == 0)  // Break out of infinite loop by choosing an incr. 
+        incr = -1;
 
       // There is no need to set scope and context here.  That will
       // happen when the dbup/dbdown/keyboard frame is popped and we