Avoid creating a zend_string twice in soap do_request

Author: ndossche

ext/soap/soap.c

@@ -2221,12 +2221,6 @@ static bool do_request(zval *this_ptr, xmlDoc *request, const char *location, co
 	}
 
 	zend_try {
-		zval *trace = Z_CLIENT_TRACE_P(this_ptr);
-		if (Z_TYPE_P(trace) == IS_TRUE) {
-			zval_ptr_dtor(Z_CLIENT_LAST_REQUEST_P(this_ptr));
-			ZVAL_STRINGL(Z_CLIENT_LAST_REQUEST_P(this_ptr), buf, buf_size);
-		}
-
 		ZVAL_STRINGL(&params[0], buf, buf_size);
 		ZVAL_STRING(&params[1], location);
 		if (action == NULL) {
@@ -2237,6 +2231,12 @@ static bool do_request(zval *this_ptr, xmlDoc *request, const char *location, co
 		ZVAL_LONG(&params[3], version);
 		ZVAL_BOOL(&params[4], one_way);
 
+		zval *trace = Z_CLIENT_TRACE_P(this_ptr);
+		if (Z_TYPE_P(trace) == IS_TRUE) {
+			zval_ptr_dtor(Z_CLIENT_LAST_REQUEST_P(this_ptr));
+			ZVAL_COPY(Z_CLIENT_LAST_REQUEST_P(this_ptr), &params[0]);
+		}
+
 		zend_function *func = zend_hash_str_find_ptr(&Z_OBJCE_P(this_ptr)->function_table, ZEND_STRL("__dorequest"));
 		ZEND_ASSERT(func != NULL);