if this works...

Author: Girgias

ext/pdo/pdo_stmt.c

@@ -2029,7 +2029,14 @@ static HashTable *dbstmt_get_gc(zend_object *object, zval **gc_data, int *gc_cou
 	pdo_stmt_t *stmt = php_pdo_stmt_fetch_object(object);
 
 	zend_get_gc_buffer *gc_buffer = zend_get_gc_buffer_create();
-	zend_get_gc_buffer_add_zval(gc_buffer, &stmt->fetch.into);
+	/* Inline zend_get_gc_buffer_add_zval(gc_buffer, &stmt->fetch.into);
+	 * Without the Z_REFCOUNTED_P(zv) check */
+	if (UNEXPECTED(gc_buffer->cur == gc_buffer->end)) {
+		zend_get_gc_buffer_grow(gc_buffer);
+	}
+	ZVAL_COPY_VALUE(gc_buffer->cur, &stmt->fetch.into);
+	gc_buffer->cur++;
+	/* End of zend_get_gc_buffer_add_zval() inlining */
 	zend_get_gc_buffer_add_zval(gc_buffer, &stmt->database_object_handle);
 	zend_get_gc_buffer_use(gc_buffer, gc_data, gc_count);