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diff --git a/tests/test-bison-yylval/parser.y b/tests/test-bison-yylval/parser.y
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+++ b/tests/test-bison-yylval/parser.y
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+/*
+ * This file is part of flex.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 
+ * Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+
+/* Accepts html-like input.
+   How to compile:
+   bison --defines --output-file="parser.c" --name-prefix="test" parser.y
+ */
+%{
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "config.h"
+
+#define YYERROR_VERBOSE 1
+#define YYPARSE_PARAM scanner
+#define YYLEX_PARAM   scanner
+
+int yyerror(char* msg);
+
+
+/* A dummy function. A check against seg-faults in yylval->str. */
+int process_text(char* s) {
+    int total =0;
+    while(*s) {
+        total += (int) *s;
+        ++s;
+    }
+    return total;
+}
+
+
+%}
+
+%pure_parser
+
+%union  {
+    long unused;
+    char * str;
+}
+
+%token <str> TAGNAME TEXT
+%token  LT 
+%token  GT
+%token  LTSLASH "</"
+
+%%
+
+html:
+    TEXT { process_text($1); free($1);}
+  | starttag html endtag
+  | html TEXT { process_text($2); free($2);}
+  | html starttag html endtag  
+  ;
+
+starttag:  LT      TAGNAME GT { process_text($2); free($2);} ;
+endtag:    LTSLASH TAGNAME GT { process_text($2);free($2);} ;
+%%
+
+int yyerror(char* msg) {
+    fprintf(stderr,"%s\n",msg);
+    return 0;
+}