solves https://github.com/pdfminer/pdfminer.six/issues/50

pdfminer/pdftypes.py

@@ -175,7 +175,7 @@ def stream_value(x):
     if not isinstance(x, PDFStream):
         if settings.STRICT:
             raise PDFTypeError('PDFStream required: %r' % x)
-        return PDFStream({}, '')
+        return PDFStream({}, b'')
     return x
 
 

tests/test_tools_pdf2txt.py

@@ -18,7 +18,6 @@ def run(datapath,filename,options=None):
     pdf2txt.main(s.split(' ')[1:])
 
 class TestDumpPDF():
-    
 
     def test_1(self):
         run('../samples/','jo')
@@ -41,5 +40,8 @@ class TestDumpPDF():
     def test_6(self):
         run('../samples/nonfree/','naacl06-shinyama')
 
+    def test_7(self):
+        run('../samples/contrib/','stamp-no')
+
 if __name__ == '__main__':
     nose.runmodule()