Fix GCC 11 false free-nonheap-obj warning.

Author: wsnyder

Changes

@@ -8,6 +8,8 @@ indicates the contributor was also the author of the fix; Thanks!
 
 ****  Fix t/03_spaces.t test for Debian (#1675). [Gregor Herrmann]
 
+****  Fix GCC 11 false free-nonheap-obj warning.
+
 
 * Verilog-Perl 3.480 2022-09-01
 

Parser/VParseBison.y

@@ -325,6 +325,11 @@ static void NEED_S09(VFileLine*, const string&) {
     //fileline->error((string)"Advanced feature: \""+tokname+"\" is a 1800-2009 construct, but used under --language 1800-2005 or earlier.");
 }
 
+// gcc-11 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98753
+#if defined(__GNUC__) && __GNUC__ == 11
+#pragma GCC diagnostic ignored "-Wfree-nonheap-object"
+#endif
+
 %}
 
 BISONPRE_VERSION(0.0, 2.999, %pure_parser)