get_pixmap cannot get full image

[tangent2018]

Description of the bug

Hello, Jorj

I want to convert pdf to jpg, first page can be converted but the second cannot.

How to reproduce the bug

pdf_path = Path(r'sample.pdf')
doc = fitz.open(str(pdf_path))
for i, page in enumerate(doc):
    trans = fitz.Matrix(2, 2).prerotate(0)
    pm = page.get_pixmap(matrix=trans, alpha=False)
    jpg_path = f'{pdf_path.stem}_{i}.jpg'
    pm.save(jpg_path)

sample.pdf

PyMuPDF version

1.23.x or earlier

Operating system

Windows

Python version

3.8

[JorjMcKie]

You must have received a lot of error messages when making the pixmap of page 2: "MuPDF error: syntax error: unknown colorspace: R9".
The color space is not supported, respectively its definition is syntactically wrong.