Bug in highlight-lines-matching-regexp?

[Deniz Dogan]

Hi

I recently found some strange behavior in the highlighting
functionality provided by highlight-lines-matching-regexp. I'm not
sure whether this is a bug or not, which is why I'm asking.

Reproduction:
1. Open a text file with any relevant contents.
2. M-x highlight-lines-matching-regexp and highlight something in the file.
3. M-x revert-buffer RET yes RET
4. Now the highlighting is gone, which I can accept, however...
5. M-x highlight-lines-matching-regexp RET RET
6. Nothing is highlighted this second time!

Is this a bug or expected behavior?

Thanks,
Deniz Dogan