Got "malloc(): unaligned tcache chunk detected Aborted (core dumped)" while using add_redact_annot/apply_redactions

[JiahuanChen]

Description of the bug

I was trying to remove all text from PDF files. My python script looks like the following:

for page in document:
    info = json.loads(page.get_text('json', flags=fitz.TEXTFLAGS_TEXT))
    for block_ind, block in enumerate(info['blocks']):
        for line_ind, line in enumerate(block['lines']):
            for span_ind, span in enumerate(line['spans']):
                # print(span)
                page.add_redact_annot(fitz.Rect(*span['bbox']))
    page.apply_redactions()

This code works well, but notice the # print(span). If I print the infos, i would get malloc(): unaligned tcache chunk detected Aborted (core dumped).

This is really strange to me.

Do I need to upload th PDF files or other informations? Because the files contain personal information, I am not willing to upload it to be honest.

How to reproduce the bug

smiply comment/uncomment the print line would reproduce the bug.

PyMuPDF version

1.24.9

Operating system

Linux

Python version

3.10