Referenced file not found in .. image:: <path> directive

[mhdirkse]

Describe the bug
I have a ReadTheDocs project that includes the following text:

#. Browse to http://localhost.
#. Click "Testing":

   .. image:: ../../frankConsoleFindTestTools.jpg

#. Click Ladybug and tab "Test".

When I build my project under Windows with Sphinx 3.5.1, my console shows warnings like:

\downloadUpload\downloadUpload.rst:: WARNING: image file not readable: frankConsoleFindTestTools.jpg

I do not have this issue with Sphinx 3.0.3.

To Reproduce
Steps to reproduce the behavior:

$ git clone https://github.com/ibissource/frank-manual
$ cd frank-manual
$ git checkout dbc5d68f1b3f056512320782b3a875462c6bce7c
$ cd docs
$ make.bat html

Expected behavior
The build finishes without warnings

Your project
https://github.com/ibissource/frank-manual

Screenshots
If applicable, add screenshots to help explain your problem.

Environment info

• OS: Windows (DOS prompt)
• Python version: 3.8.2
• Sphinx version: 3.5.1
• Sphinx extensions: ??
• Extra tools: ??

Additional context
Here is the console output I have:

output.txt

[tk0miya]

I hope #8967 will fix this problem. Could you check this please? You can try it with pip install git+https://github.com/tk0miya/sphinx@8959_unix_pathsep_on_windows.

[mhdirkse]

Dear tk0miya,

Your fix works. I installed the fix with the pip-command you provided. I removed my old "build" directory and did "make.bat html" again. I did not get warnings anymore. I also checked that the file frankConsoleFindTestTools.jpg is rendered again. Thank you very much.

With kind regards,

Martijn Dirkse

[ndunnewind]

I ran into the same issue with the :download: role. #8967 also seems to work for this problem.