From 40b4ccffa88144ecf3244f0612c447a364cc913d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mart=C3=ADn=20Fern=C3=A1ndez?= <paziusss@gmail.com>
Date: Mon, 26 Oct 2020 12:26:18 +0100
Subject: [PATCH] KoptInterface:getWordFromBoxes: guard against nil boxes
 (#6827)

Fixes #6825
---
 frontend/document/koptinterface.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/frontend/document/koptinterface.lua b/frontend/document/koptinterface.lua
index 7049af3f4..863a18c8e 100644
--- a/frontend/document/koptinterface.lua
+++ b/frontend/document/koptinterface.lua
@@ -799,7 +799,7 @@ end
 Get word and word box around `pos`.
 --]]
 function KoptInterface:getWordFromBoxes(boxes, pos)
-    if not pos or #boxes == 0 then return {} end
+    if not pos or not boxes or #boxes == 0 then return {} end
     local i, j = getWordBoxIndices(boxes, pos)
     local lb = boxes[i]
     local wb = boxes[i][j]