# HG changeset patch
# User John W. Eaton <jwe@octave.org>
# Date 1420655006 18000
# Node ID 146f1daa805be207b7db49001d447c26be4c00f6
# Parent  3b0a9a83236071066c7a39023230ccb92c1a0096
avoid valgrind warnings about using freed memory

* sysdep.cc (Funsetenv): Explicitly create temporary std::string object.

diff -r 3b0a9a832360 -r 146f1daa805b libinterp/corefcn/sysdep.cc
--- a/libinterp/corefcn/sysdep.cc	Mon Jan 05 17:44:00 2015 -0500
+++ b/libinterp/corefcn/sysdep.cc	Wed Jan 07 13:23:26 2015 -0500
@@ -683,11 +683,11 @@
 
   if (nargin == 1)
     {
-      const char *var = args(0).string_value ().c_str ();
+      std::string tmp = args(0).string_value ();
 
       if (! error_state)
         {
-          int status = gnulib::unsetenv (var);
+          int status = gnulib::unsetenv (tmp.c_str ());
           retval = status;
         }
     }