Plucker pdb files fail to load

[Nick]

I have attached a sample file - the error is consistent across many. The files can be opened with other Plucker compatible readers.

Error message:
calibre, version 2.39.0
ERROR: Could not open ebook: unpack requires a string argument of length 2

Traceback (most recent call last):
  File "site-packages/calibre/gui2/viewer/main.py", line 37, in run
  File "lib/python2.7/threading.py", line 763, in run
  File "site-packages/calibre/ebooks/oeb/iterator/book.py", line 100, in __enter__
  File "site-packages/calibre/customize/conversion.py", line 241, in __call__
  File "site-packages/calibre/ebooks/conversion/plugins/pdb_input.py", line 23, in convert
  File "site-packages/calibre/ebooks/pdb/header.py", line 19, in __init__
  File "site-packages/calibre/ebooks/pdb/header.py", line 29, in section_count
error: unpack requires a string argument of length 2

[Kovid Goyal (kovid)]

Changing the component for this bug.

 assignee user-none
 tag pdb-input
 status triaged

[Kovid Goyal (kovid)]

Fixed in branch master. The fix will be in the next release. calibre is usually released every Friday.

 status fixreleased