Fix Regextests

- One of the bug316338 test cases is expected to succeed.
- Memory leak in testRegexp.c.
- Refcount handling in xmlExpHashGetEntry.

result/regexp/bug316338

@@ -1,6 +1,6 @@
 Regexp: (((C|c)(([\s]*\-?[0-9]+(\.[0-9]+)?((e|E)\-?[0-9]+)?){3})+[\s]*))+
 C 433: Ok
-C 433 12: Fail
+C 433 12: Ok
 C 433 123: Ok
 C 433 123 456: Ok
 C 724.64,433.12 718.08,433.12 711.52,433.12 724.64,433.12 718.08,433.12 711.52,433.12 724.64,433.12 718.08,433.12 711.52,433.12 724.64,433.12 718.08,433.12 711.52,433.12 724.64,433.12 718.08,433.12 711.52,433.12 724.64,433.12 718.08,433.12 711.52,433.12 724.64,433.12 718.08,433.12 711.52,433.12 724.64,433.12 718.08,433.12 711.52,433.12 724.64,433.12 718.08,433.12 711.52,433.12 724.64,433.12 718.08,433.12 711.52,433.12: Fail

testRegexp.c

@@ -185,20 +185,19 @@ static void
 testReduce(xmlExpCtxtPtr ctxt, xmlExpNodePtr expr, const char *tst) {
     xmlBufferPtr xmlExpBuf;
     xmlExpNodePtr sub, deriv;
-    xmlExpBuf = xmlBufferCreate();
 
     sub = xmlExpParse(ctxt, tst);
     if (sub == NULL) {
         printf("Subset %s failed to parse\n", tst);
 	return;
     }
+    xmlExpBuf = xmlBufferCreate();
     xmlExpDump(xmlExpBuf, sub);
     printf("Subset parsed as: %s\n",
            (const char *) xmlBufferContent(xmlExpBuf));
     deriv = xmlExpExpDerive(ctxt, expr, sub);
     if (deriv == NULL) {
         printf("Derivation led to an internal error, report this !\n");
-	return;
     } else {
         xmlBufferEmpty(xmlExpBuf);
 	xmlExpDump(xmlExpBuf, deriv);
@@ -210,6 +209,7 @@ testReduce(xmlExpCtxtPtr ctxt, xmlExpNodePtr expr, const char *tst) {
 	           (const char *) xmlBufferContent(xmlExpBuf));
 	xmlExpFree(ctxt, deriv);
     }
+    xmlBufferFree(xmlExpBuf);
     xmlExpFree(ctxt, sub);
 }
 

xmlregexp.c

@@ -6629,7 +6629,7 @@ xmlExpHashGetEntry(xmlExpCtxtPtr ctxt, xmlExpNodeType type,
         /* OR reduction rule 1 */
 	/* a | a reduced to a */
         if (left == right) {
-	    left->ref--;
+	    xmlExpFree(ctxt, right);
 	    return(left);
 	}
         /* OR canonicalization rule 1 */