Don't throw warning if exception thrown during dom validation

Author: nikic

ext/dom/document.c

@@ -1681,7 +1681,9 @@ static void _dom_document_schema_validate(INTERNAL_FUNCTION_PARAMETERS, int type
 	sptr = xmlSchemaParse(parser);
 	xmlSchemaFreeParserCtxt(parser);
 	if (!sptr) {
-		php_error_docref(NULL, E_WARNING, "Invalid Schema");
+		if (!EG(exception)) {
+			php_error_docref(NULL, E_WARNING, "Invalid Schema");
+		}
 		RETURN_FALSE;
 	}
 

ext/libxml/libxml.c

@@ -485,7 +485,6 @@ static void php_libxml_internal_error_handler(int error_type, void *ctx, const c
 	char *buf;
 	int len, len_iter, output = 0;
 
-
 	len = vspprintf(&buf, 0, *msg, ap);
 	len_iter = len;
 
@@ -502,7 +501,8 @@ static void php_libxml_internal_error_handler(int error_type, void *ctx, const c
 	if (output == 1) {
 		if (LIBXML(error_list)) {
 			_php_list_set_error_structure(NULL, ZSTR_VAL(LIBXML(error_buffer).s));
-		} else {
+		} else if (!EG(exception)) {
+			/* Don't throw additional notices/warnings if an exception has already been thrown. */
 			switch (error_type) {
 				case PHP_LIBXML_CTX_ERROR:
 					php_libxml_ctx_error_level(E_WARNING, ctx, ZSTR_VAL(LIBXML(error_buffer).s));

ext/libxml/tests/libxml_set_external_entity_loader_error1.phpt

@@ -20,9 +20,7 @@ try {
 }
 
 echo "Done.\n";
---EXPECTF--
+--EXPECT--
 bool(true)
-
-Warning: DOMDocument::validate(): Could not load the external subset "http://example.com/foobar" in %s on line %d
 Exception: Too few arguments to function {closure}(), 3 passed and exactly 4 expected
 Done.