MissingObjectException when running git status after adding an empty directory to jgit

[MohammedKHC0]

Version

7.1.0

Operating System

Linux/Unix

Bug description

Run the following commands to reproduce

1. jgit init
2. mkdir test
3. jgit add test
4. jgit status

It crash with MissingObjectException unknown object 00000000000000000

Actual behavior

It crash with MissingObjectException unknown object 00000000000000000

Expected behavior

Work just like actual c git, if you run the same commands it won't crash.

Relevant log output

No response

Other information

I think in order to fix the bug. Before adding a directory check if it's not empty.

[msohn]

I tried using the tip of the master branch and couldn't reproduce the problem.
Running add on an empty folder shouldn't do anything because git only tracks files but not directories.
This means after the add command the repository is still empty and running find on the .git directory finds no objects:

$ find .git/
.git/
.git/config
.git/objects
.git/objects/pack
.git/objects/info
.git/HEAD
.git/logs
.git/logs/refs
.git/logs/refs/heads
.git/hooks
.git/refs
.git/refs/heads
.git/refs/tags
.git/index
.git/branches