Error when stashing all (more than 1) your "staged" files

[dsolerh]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Create changes on multiple files
2. Press 'a' to stage them all
3. Press 'S' to open the stash options menu
4. Manually go to the option "Stash staged changes" and press Enter
5. Leave the name for the stash blank just press enter

Expected behavior
I expect not to be an error shown

Screenshots
Steps 1 and 2

Step 3 and 4

Step 5

Result

Version info:
commit=, build date=, build source=homebrew, version=0.41.0, os=darwin, arch=arm64, git version=2.44.0

Additional context
Add any other context about the problem here.

Note: please try updating to the latest version or manually building the latest master to see if the issue still occurs.

[dsolerh]

I also want to try and fix this

[stefanhaller]

This one looks easy to fix. It seems that we only need to check if there are any unstaged changes, and if not, fall back to the normal, simple stash.

There's a different, but somewhat related problem that seems harder to fix: #3333. In case you feel like looking into that one, too.

[dsolerh]

I added the PR, how can I link it to this issue?
here's the link: #3568

[stefanhaller]

Fixed by #3569.