From ac20f766356b12ce3bbd82dda0b2a5da182f663f Mon Sep 17 00:00:00 2001
From: greg-roper <greg.roper@socionext.com>
Date: Wed, 5 Oct 2016 17:08:33 +0100
Subject: [PATCH] Catch IO errors when building font cache

Problem seen on Windows machines where permission was denied when trying to load specific fonts (DINpro Light).
---
 lib/matplotlib/font_manager.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/matplotlib/font_manager.py b/lib/matplotlib/font_manager.py
index 1d0ba8377148..f9cfb1600cb6 100644
--- a/lib/matplotlib/font_manager.py
+++ b/lib/matplotlib/font_manager.py
@@ -591,6 +591,9 @@ def createFontList(fontfiles, fontext='ttf'):
                 verbose.report("Cannot handle unicode filenames")
                 # print >> sys.stderr, 'Bad file is', fpath
                 continue
+            except IOError:
+                verbose.report("IO error - cannot open font file %s" % fpath)
+                continue
             try:
                 prop = ttfFontProperty(font)
             except (KeyError, RuntimeError, ValueError):