git-bugreport-2021-01-06-1209.txt (git can't deal with special characters)

[Daniel Troger <random_n0body@icloud.com>]

Thank you for filling out a Git bug report!
Please answer the following questions to help us understand your issue.

What did you do before the bug happened? (Steps to reproduce your issue)
I ran `git restore -p .`

What did you expect to happen? (Expected behavior)
git restore to open in interactive mode and letting me select data to discard

What happened instead? (Actual behavior)
I got an error message:
```
me@iMac:[redacted]/paulbrunngård-springyard/src$ git restore -p .
BUG: pathspec.c:495: error initializing pathspec_item
Cannot close git diff-index --cached --numstat --summary HEAD -- :(,prefix:44)[redacted]/paulbrunngård-springyard/src/ () at /usr/local/Cellar/git/2.29.2/libexec/git-core/git-add--interactive line 183.
```

What's different between what you expected and what actually happened?
The main problem is that the command didn't do anything. It basically printed an error message instead of changing a file in the way I wanted.

Anything else you want to add:
Yeah. So pretty obviously the problem is the "å" in the filename. The interesting thing is that the folder with the "å" in the filename seems to exist twice, with differently encoded "å"s. But their content IS AUTOMATICALLY PERFECTLY SYNCED. And the only tool which recognizes them as two different folders is git. ls in the terminal shows them as one, finder shows them as one, even "glob" in php shows them as one.
This is what git seems to see them at (taken from git status):

`modified:   "paulbrunnga\314\212rd-springyard/`
And further down:
```
Untracked files:
  (use "git add <file>..." to include in what will be committed)
	"paulbrunng\303\245rd-springyard/"
```
Here is a zip containing the folder (emptied): https://arxius.io/f/7ec7e1c7
I tried creating a new git repo, extracting the zip in it, going into the folder and running `git add empty` and could reproduce that git sees it as two different folders.


Please review the rest of the bug report below.
You can delete any lines you don't wish to share.


[System Info]
git version:
git version 2.29.2
cpu: x86_64
no commit associated with this build
sizeof-long: 8
sizeof-size_t: 8
shell-path: /bin/sh
uname: Darwin 17.7.0 Darwin Kernel Version 17.7.0: Sun Jun  2 20:31:42 PDT 2019; root:xnu-4570.71.46~1/RELEASE_X86_64 x86_64
compiler info: clang: 10.0.0 (clang-1000.11.45.5)
libc info: no libc information available
$SHELL (typically, interactive shell): /bin/bash


[Enabled Hooks]