From 2b1c1e657a9e231a3fdb4f21578e7b2d520fc64f Mon Sep 17 00:00:00 2001
From: Lennart Regebro <regebro@gmail.com>
Date: Thu, 12 Oct 2017 10:41:55 -0400
Subject: [PATCH] Initialize _fieldlist_row_index just like _table_row_index

visit_field can be called before visit_field_list if the field list is at the beginning of the document.
By initializing _fieldlist_row_index in __init__ this is supported.

Closes #4145
---
 sphinx/writers/html.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sphinx/writers/html.py b/sphinx/writers/html.py
index 6dd8bafe5..8d02793e3 100644
--- a/sphinx/writers/html.py
+++ b/sphinx/writers/html.py
@@ -89,6 +89,7 @@ class HTMLTranslator(BaseTranslator):
         self.param_separator = ''
         self.optional_param_level = 0
         self._table_row_index = 0
+        self._fieldlist_row_index = 0
         self.required_params_left = 0
 
     def visit_start_of_file(self, node):