Unexpected behavior of `annot.set_rect()` with carets and strikeouts

[charleskolozsvary]

Description of the bug

annot.set_rect() sets the rectangle incorrectly with certain caret annotations. It appears to usually be off just a few points.

Also, attempting to set the rectangle of a strikeout annotation produces the message

cannot set rect: code=4: StrikeOut annotations have no Rect property

which it as the very least not true in my example: I successfully retrieve its rectangle.

How to reproduce the bug

Input

bug.pdf

import pymupdf
from copy import deepcopy

if __name__ == '__main__':
    doc = pymupdf.open('bug.pdf')
    for page in doc:
        caret = page.add_caret_annot((50,50))
        
        for annot in page.annots():
            before_rect = deepcopy(annot.rect)

            def draw_rectangle(rect, c, w):
                drect = page.add_freetext_annot(rect, "", text_color=c)
                drect.set_border(width=w)
                drect.update()

            draw_rectangle(annot.rect, (0,0,1), .3)
            
            print('before:', annot.rect)
            annot.set_rect(annot.rect)
            print('after:', annot.rect)
            
            print('difference:', annot.rect - before_rect)

            draw_rectangle(annot.rect, (0, 1, 0), .3)

            print()
    doc.save('bug-result.pdf')

---

Output

bug-result.pdf

before: Rect(177.4219970703125, 119.0980224609375, 187.93299865722656, 127.93499755859375)
cannot set rect: code=4: StrikeOut annotations have no Rect property
after: Rect(177.4219970703125, 119.0980224609375, 187.93299865722656, 127.93499755859375)
difference: Rect(0.0, 0.0, 0.0, 0.0)

before: Rect(185.28199768066406, 123.5159912109375, 190.58399963378906, 132.35302734375)
after: Rect(184.22157287597656, 122.45556640625, 191.64442443847656, 133.4134521484375)
difference: Rect(-1.0604248046875, -1.0604248046875, 1.0604248046875, 1.0604248046875)

before: Rect(49.0, 50.5, 69.0, 64.5)
after: Rect(49.0, 50.5, 69.0, 64.5)
difference: Rect(0.0, 0.0, 0.0, 0.0)

---

What originally created the annotations

The annotations came from Foxit PDF Reader, which is maybe related to the issue (nothing goes wrong on a pymupdf inserted caret, which can be seen in the entire bug-result.pdf), but that's just a guess.

PyMuPDF version

1.26.5

Operating system

MacOS

Python version

3.14