renderer.rb in combine_pdf-0.2.32

- old
+ new

@@ -78,10 +78,12 @@
       # An array shall be written as a sequence of objects enclosed in SQUARE BRACKETS (using LEFT SQUARE BRACKET (5Bh) and RIGHT SQUARE BRACKET (5Dh)).
       # EXAMPLE [549 3.14 false (Ralph) /SomeName]
       ('[' + (object.collect { |item| object_to_pdf(item) }).join(' ') + ']').force_encoding(Encoding::ASCII_8BIT)
     end
 
+    EMPTY_PAGE_CONTENT_STREAM = {is_reference_only: true, referenced_object: { indirect_reference_id: 0, raw_stream_content: '' }}
+
     def format_hash_to_pdf(object)
       # if the object is only a reference:
       # special conditions apply, and there is only the setting of the reference (if needed) and output
       if object[:is_reference_only]
         #
@@ -105,10 +107,10 @@
           out << "\nendobj\n"
           return out.join.force_encoding(Encoding::ASCII_8BIT)
         end
       end
       # remove extra page references.
-      object[:Contents].delete(is_reference_only: true, referenced_object: { indirect_reference_id: 0, raw_stream_content: '' }) if object[:Type] == :Page
+      object[:Contents].delete(EMPTY_PAGE_CONTENT_STREAM) if object[:Type] == :Page && object[:Contents].is_a?(Array)
       # correct stream length, if the object is a stream.
       object[:Length] = object[:raw_stream_content].bytesize if object[:raw_stream_content]
 
       # if the object is not a simple object, it is a dictionary
       # A dictionary shall be written as a sequence of key-value pairs enclosed in double angle brackets (<<...>>)