Some PDFs use a /Name dictionary key in /DocumentInfo whose bytes are not
valid UTF-8/PDFDocEncoding, e.g. a Latin-1 /Saks#e5r. Older pikepdf raised
UnicodeDecodeError while iterating such a block, crashing the pipeline
during PDF/A conversion. repair_docinfo_nuls is documented to log and
continue on a malformed DocumentInfo block, so catch UnicodeDecodeError
alongside TypeError.
Add a mock-based unit test that drives the decode-error branch (current
pikepdf surrogate-escapes instead of raising) and an end-to-end test over
the reporter's file, committed as docinfo_latin1_key.pdf.
James R. Barlow
ea7ad7d683