Fix piecemap downlad error when invalid piecemap got downloaded

Author: shortcutme

plugins/Bigfile/BigfilePlugin.py

@@ -391,8 +391,8 @@ def getPiecemap(self, inner_path):
     def verifyPiece(self, inner_path, pos, piece):
         try:
             piecemap = self.getPiecemap(inner_path)
-        except OSError as err:
-            raise VerifyError("Unable to download piecemap: %s" % err)
+        except Exception as err:
+            raise VerifyError("Unable to download piecemap: %s" % Debug.formatException(err))
 
         piece_i = int(pos / piecemap["piece_size"])
         if CryptHash.sha512sum(piece, format="digest") != piecemap["sha512_pieces"][piece_i]: