From 2ff12af50cd9713aa39de9ca410778eb2fad88bb Mon Sep 17 00:00:00 2001
From: chrox <chrox.huang@gmail.com>
Date: Thu, 23 Oct 2014 09:01:10 +0800
Subject: [PATCH] protected call of mupdf.renderImage

---
 frontend/document/credocument.lua | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/frontend/document/credocument.lua b/frontend/document/credocument.lua
index 5d77ff10f..bae09b6ad 100644
--- a/frontend/document/credocument.lua
+++ b/frontend/document/credocument.lua
@@ -148,9 +148,11 @@ function CreDocument:getCoverPageImage()
     local data, size = self._document:getCoverPageImageData()
     if data and size then
         local Mupdf = require("ffi/mupdf")
-        local image = Mupdf.renderImage(data, size)
-        ffi.C.free(data)
-        return image
+        local ok, image = pcall(Mupdf.renderImage, data, size)
+        if ok then
+            ffi.C.free(data)
+            return image
+        end
     end
 end