debug_tablefinder is weirdly offset

[px-xp]

Describe the bug

When I run debug_tablefinder on a PDF the offset of the overview is weird.

Have you tried repairing the PDF?

Yes

Code to reproduce the problem

p: pdfplumber.PDF
pdf: pdfplumber.PDF = pdfplumber.open("./buggy.pdf")

p0 = pdf.pages[0]
im = p0.to_image(resolution=150)
im.reset().debug_tablefinder({
    "vertical_strategy": "lines",
    "horizontal_strategy": "lines"
})
print(len(p0.find_tables()))
im.draw_rects(p0.chars)
im.show()

PDF file

Please attach any PDFs necessary to reproduce the problem.

buggy.pdf

If you need to redact text in a sensitive PDF, you can run it through JoshData/pdf-redactor.

Expected behavior

Debug view should line up correctly.

Actual behavior

Debug view is offset.

Screenshots

Would expect this to line up nicely like other PDFs but it doesn't.

Environment

• pdfplumber version: 0.10.3
• Python version: 3.9.1
• OS: Mac

Additional context

Add any other context/notes about the problem here.

[jsvine]

Hi @px-xp, thank you for the clear bug report. Luckily, a fix for this has already been made (https://github.com/jsvine/pdfplumber/commit/07d9997ee587723c32e2178be65eea584102bf58) and is available on develop. To install that version before it's part of the next release, you can run pip install -U git+https://github.com/jsvine/pdfplumber@develop

Here is the result of im.reset().debug_tablefinder():

[px-xp]

Thank you @jsvine. This is a really cool tool!