# HG changeset patch
# User John W. Eaton <jwe@octave.org>
# Date 1594587592 14400
# Node ID af1a9c1db88e02b51459970078db3ded32a6223d
# Parent  c9f7d1d7a6e7f5b448bb9c7c9987ceab4676ecd7
reset pointer to lvalue list before executing commands (bug #58748, bug #58751)

* pt-eval.cc (tree_evaluator::visit_statement): Set m_lvalue_list to
nullptr when executing commands.  From Fernando Alvarruiz.

diff -r c9f7d1d7a6e7 -r af1a9c1db88e libinterp/parse-tree/pt-eval.cc
--- a/libinterp/parse-tree/pt-eval.cc	Sat Jul 11 14:52:10 2020 +0200
+++ b/libinterp/parse-tree/pt-eval.cc	Sun Jul 12 16:59:52 2020 -0400
@@ -3078,7 +3078,12 @@
         try
           {
             if (cmd)
-              cmd->accept (*this);
+              {
+                unwind_protect_var<const std::list<octave_lvalue> *>
+                  upv (m_lvalue_list, nullptr);
+
+                cmd->accept (*this);
+              }
             else
               {
                 if (m_echo_state)