# HG changeset patch
# User John W. Eaton <jwe@octave.org>
# Date 1607681167 18000
# Node ID 32fdcf67a683f0710367da3a95ca9a8fc9a9c1aa
# Parent  3d6a6faa9225d723d0d32578bc3d263a17331ed5
don't propagate prevailing isargout info through mexCallMATLAB (bug #59597)

* mex.cc (mexCallMATLAB): Invalidate lvalue_list before calling feval.

diff -r 3d6a6faa9225 -r 32fdcf67a683 libinterp/corefcn/mex.cc
--- a/libinterp/corefcn/mex.cc	Thu Dec 10 23:23:09 2020 +0100
+++ b/libinterp/corefcn/mex.cc	Fri Dec 11 05:06:07 2020 -0500
@@ -3254,6 +3254,16 @@
 
   try
     {
+      octave::tree_evaluator& tw = interp.get_evaluator ();
+
+      octave::unwind_action act
+        ([&tw] (const std::list<octave::octave_lvalue> *lvl)
+         {
+           tw.set_lvalue_list (lvl);
+         }, tw.lvalue_list ());
+
+      tw.set_lvalue_list (nullptr);
+
       retval = octave::feval (fname, args, nargout);
     }
   catch (const octave::execution_exception&)