SystemError: <built-in function Page_get_texttrace> returned a result with an error set

[shiu886]

Running this script

import fitz
print(fitz.__doc__)
doc = fitz.open('2-p1.pdf')
for page in doc:
        allSpans = page.get_texttrace()
        print(f"{page.number}, # of spans={len(allSpans)}")

on some pdf file, for example, 2-p1.pdf
will cause

UnicodeDecodeError: 'utf-8' codec can't decode byte 0xcb in position 0: invalid continuation byte

The above exception was the direct cause of the following exception:

SystemError: <class 'UnicodeDecodeError'> returned a result with an error set

<same messages repeats many times>

  File "D:\Program Files\Python\Python37\lib\site-packages\fitz\fitz.py", line 6278, in get_texttrace
    val = _fitz.Page_get_texttrace(self)
SystemError: <built-in function Page_get_texttrace> returned a result with an error set

My system

PyMuPDF 1.21.0: Python bindings for the MuPDF 1.21.0 library.
Version date: 2022-11-08 00:00:01.
Built for Python 3.7 on win32 (64-bit).

I tried also 1.19.6 and 1.20.2. All give this same error.

[julian-smith-artifex-com]

Thanks for reporting this. I've reproduced it, will investigate some more later today.

[JorjMcKie]

This is being caused by a font name in the file, that cannot be interpretated as UTF-8. So a fallback to escape decoding must be used - which happens for (hopefully) all other places where font names are extracted.
This occasion was previously undetected, but it is an easy change.

pprint(doc.get_page_fonts(0))
[(6578, 'ttf', 'TrueType', 'ABCDEE+ËÎÌå', 'F1', 'WinAnsiEncoding'),  # this one!
 (6580, 'ttf', 'Type0', 'ABCDEE+ËÎÌå', 'F2', 'Identity-H'),  # this one!
 (4, 'ttf', 'TrueType', 'ABCDEE+Calibri', 'F6', 'WinAnsiEncoding')]

[julian-smith-artifex-com]

Fixed in PyMuPDF-1.21.1.