When I'm assigned a bug and there's not unit test that covers it, the first thing I do is write the test that fails, and then go about fixing it. And usually along the way discover additional cases that would cause similar failure that hadn't been covered yet.
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
When I'm assigned a bug and there's not unit test that covers it, the first thing I do is write the test that fails, and then go about fixing it. And usually along the way discover additional cases that would cause similar failure that hadn't been covered yet.