From 34b6bea6a87a0b3072365cc042152943dddce0a3 Mon Sep 17 00:00:00 2001
From: Takeshi KOMIYA <i.tkomiya@gmail.com>
Date: Sat, 28 Apr 2018 17:03:56 +0900
Subject: [PATCH] Fix longest_label should be escaped

---
 sphinx/writers/latex.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sphinx/writers/latex.py b/sphinx/writers/latex.py
index 64a7376c5..bb7dc83ac 100644
--- a/sphinx/writers/latex.py
+++ b/sphinx/writers/latex.py
@@ -2139,7 +2139,8 @@ class LaTeXTranslator(nodes.NodeVisitor):
             # adjust max width of citation labels not to break the layout
             longest_label = longest_label[:MAX_CITATION_LABEL_LENGTH]
 
-        self.body.append(u'\n\\begin{sphinxthebibliography}{%s}\n' % longest_label)
+        self.body.append(u'\n\\begin{sphinxthebibliography}{%s}\n' %
+                         self.encode(longest_label))
 
     def depart_thebibliography(self, node):
         # type: (nodes.Node) -> None