bug: incomplete redaction of text or some letters #158

mahlzahn commented 2026年03月18日 16:00:06 +01:00

Description

Sometimes, text or some letters are not properly redacted

Examples for failing documents

• samples_artifex/cff_reuses_private_dict.pdf

How to reproduce with PyMuPDF

document = pymupdf.Document("tests/data/samples_artifex/cff_reuses_private_dict.pdf")
page = document[0]
page.add_redact_annot(page.cropbox)
page.apply_redactions(text=pymupdf.PDF_REDACT_TEXT_REMOVE)
page.get_text()

returns

'p\np\n'

Upstream issues

• https://github.com/pymupdf/PyMuPDF/issues/4944

Impact

It seems to be a very rare issue, it was found in only 1 of 1,000 PDF document samples, see #110.

## Description Sometimes, text or some letters are not properly redacted ### Examples for failing documents - [samples_artifex/cff_reuses_private_dict.pdf](https://github.com/ArtifexSoftware/tests/blob/master/pdf/cff_reuses_private_dict.pdf) ### How to reproduce with PyMuPDF ```py document = pymupdf.Document("tests/data/samples_artifex/cff_reuses_private_dict.pdf") page = document[0] page.add_redact_annot(page.cropbox) page.apply_redactions(text=pymupdf.PDF_REDACT_TEXT_REMOVE) page.get_text() ``` returns ``` 'p\np\n' ``` ## Upstream issues - https://github.com/pymupdf/PyMuPDF/issues/4944 ## Impact It seems to be a very rare issue, it was found in only 1 of 1,000 PDF document samples, see #110.