Correct input_version bound in incremental writer

MatthiasValvekens · Sep 17, 2022 · 8f9c1cd · 8f9c1cd
1 parent b1f0963
commit 8f9c1cd
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/pyhanko/pdf_utils/incremental_writer.py b/pyhanko/pdf_utils/incremental_writer.py
@@ -59,6 +59,9 @@ def __init__(self, input_stream, prev: PdfFileReader = None, strict=True):
         if self._info is not None:
             self.trailer['/Info'] = self._info
         self._resolves_objs_from = (self, prev)
+        input_ver = self.prev.input_version
+        if input_ver > self.output_version:
+            self.output_version = input_ver
         self.ensure_output_version(self.__class__.output_version)
 
         self.security_handler = prev.security_handler