I just ran `git merge otherBranch` and it output this error to the command line:

```
fatal: Failed to execute internal merge

```

What could this mean? I would give more details, but I'm not sure what details would be important. Have other people experienced this, and if so what caused it in your case?

EDIT:

It looks like this is a catch-all error message. However, if other people have found specific reasons for failure and think others might benefit from the solution you found, feel free to post those as well.