diff --git a/src/UglyToad.PdfPig/Fonts/CompactFontFormat/CompactFontFormatData.cs b/src/UglyToad.PdfPig/Fonts/CompactFontFormat/CompactFontFormatData.cs
index 7a7e80e7..46bd064a 100644
--- a/src/UglyToad.PdfPig/Fonts/CompactFontFormat/CompactFontFormatData.cs
+++ b/src/UglyToad.PdfPig/Fonts/CompactFontFormat/CompactFontFormatData.cs
@@ -4,6 +4,7 @@
     using System.Collections.Generic;
     using System.Diagnostics;
     using System.Text;
+    using Util;
 
     /// <summary>
     /// Provides access to the raw bytes of this Compact Font Format file with utility methods for reading data types from it.
@@ -112,6 +113,11 @@
 
         public CompactFontFormatData SnapshotPortion(int startLocation, int length)
         {
+            if (length == 0)
+            {
+                return new CompactFontFormatData(EmptyArray<byte>.Instance);
+            }
+
             if (startLocation > dataBytes.Count - 1 || startLocation + length > dataBytes.Count)
             {
                 throw new ArgumentException($"Attempted to create a snapshot of an invalid portion of the data. Length was {dataBytes.Count}, requested start: {startLocation} and requested length: {length}.");
diff --git a/src/UglyToad.PdfPig/Fonts/Composite/ToUnicodeCMap.cs b/src/UglyToad.PdfPig/Fonts/Composite/ToUnicodeCMap.cs
index 426540f3..31bcfeea 100644
--- a/src/UglyToad.PdfPig/Fonts/Composite/ToUnicodeCMap.cs
+++ b/src/UglyToad.PdfPig/Fonts/Composite/ToUnicodeCMap.cs
@@ -31,7 +31,7 @@
             if (CanMapToUnicode)
             {
                 IsUsingIdentityAsUnicodeMap =
-                    cMap.Name.StartsWith("Identity-", StringComparison.InvariantCultureIgnoreCase);
+                    cMap.Name?.StartsWith("Identity-", StringComparison.InvariantCultureIgnoreCase) == true;
             }
         }
 
diff --git a/src/UglyToad.PdfPig/Fonts/Parser/Parts/CidFontFactory.cs b/src/UglyToad.PdfPig/Fonts/Parser/Parts/CidFontFactory.cs
index e05fda32..ed377446 100644
--- a/src/UglyToad.PdfPig/Fonts/Parser/Parts/CidFontFactory.cs
+++ b/src/UglyToad.PdfPig/Fonts/Parser/Parts/CidFontFactory.cs
@@ -151,7 +151,7 @@
             }
         }
 
-        private static IReadOnlyDictionary<int, decimal> ReadWidths(DictionaryToken dict)
+        private IReadOnlyDictionary<int, decimal> ReadWidths(DictionaryToken dict)
         {
             var widths = new Dictionary<int, decimal>();
 
@@ -166,7 +166,7 @@
             {
                 var firstCode = (NumericToken)widthArray.Data[counter++];
                 var next = widthArray.Data[counter++];
-                if (next is ArrayToken array)
+                if (DirectObjectFinder.TryGet(next, pdfScanner, out ArrayToken array))
                 {
                     int startRange = firstCode.Int;
                     int arraySize = array.Data.Count;