Fix frameless argument completion for vararg functions

Author: iluuu1994

Zend/zend_compile.c

@@ -4552,7 +4552,9 @@ static const zend_frameless_function_info *find_frameless_function_info(zend_ast
 
 	while (frameless_function_info->handler) {
 		if (frameless_function_info->num_args >= args->children
-		 && fbc->common.required_num_args <= args->children) {
+		 && fbc->common.required_num_args <= args->children
+		 && (!(fbc->common.fn_flags & ZEND_ACC_VARIADIC)
+		  || frameless_function_info->num_args == args->children)) {
 			uint32_t num_args = frameless_function_info->num_args;
 			uint32_t offset = find_frameless_function_offset(num_args, frameless_function_info->handler);
 			if (offset == (uint32_t)-1) {