Comment 2 for bug 383559

One more thing that I've observed is that after getting the backtrace in the bug description, the only "friendly" way to cancel checkbox is to press Ctrl-C.

After that, if the test case description is modified and checkbox is run again, the test case description isn't updated. As a workaround to solve the problem, I killed the backend and then then new test case was updated. Hence, it seems that the problem isn't only that checkbox doesn't perform the required action, but also that the backend remains stuck in some internal state.