From cab46f1ecf10ab248b059330e2bd9064786ce454 Mon Sep 17 00:00:00 2001
From: Eliot Jones <elioty@hotmail.co.uk>
Date: Mon, 25 Dec 2017 22:30:34 +0000
Subject: [PATCH] handle error case where the descendant font for a type 0
 composite font is not a dictionary

---
 src/UglyToad.Pdf/Fonts/Parser/Handlers/Type0FontHandler.cs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/UglyToad.Pdf/Fonts/Parser/Handlers/Type0FontHandler.cs b/src/UglyToad.Pdf/Fonts/Parser/Handlers/Type0FontHandler.cs
index 54892164..13bb0cb1 100644
--- a/src/UglyToad.Pdf/Fonts/Parser/Handlers/Type0FontHandler.cs
+++ b/src/UglyToad.Pdf/Fonts/Parser/Handlers/Type0FontHandler.cs
@@ -41,6 +41,10 @@
                 {
                     ParseDescendant(descendantFontDictionary, reader, isLenientParsing);
                 }
+                else
+                {
+                    throw new InvalidFontFormatException("Expected to find a Descendant Font dictionary, instead it was: " + parsed);
+                }
             }
             else
             {
@@ -68,7 +72,7 @@
 
             return font;
         }
-        
+
         private static bool TryGetFirstDescendant(PdfDictionary dictionary, out CosObject descendant)
         {
             descendant = null;