# HG changeset patch
# User Stefan Mahr <dac922@gmx.de>
# Date 1395700870 -3600
# Node ID e3fca7930c1e846acb2c5bbefde4a2cb9596b92b
# Parent  d565a5f5e06edec08a5ad8a4b43854707ddd5893
Fix segfault if subsasgn in @class returns no output (bug #41945)

* libinterp/octave-value/ov-usr-fcn.cc (octave_user_function::subsasgn_optimization_ok):
  Check if param_list or ret_list is valid.

diff -r d565a5f5e06e -r e3fca7930c1e libinterp/octave-value/ov-usr-fcn.cc
--- a/libinterp/octave-value/ov-usr-fcn.cc	Fri Feb 28 19:18:11 2014 +0100
+++ b/libinterp/octave-value/ov-usr-fcn.cc	Mon Mar 24 23:41:10 2014 +0100
@@ -654,6 +654,7 @@
 {
   bool retval = false;
   if (Voptimize_subsasgn_calls
+      && param_list && ret_list
       && param_list->length () > 0 && ! param_list->varargs_only ()
       && ret_list->length () == 1 && ! ret_list->takes_varargs ())
     {