Bug Hunting Strategies?

Question

Let\'s say you have a bug that was found in functional testing of a fairly complex part of the software. It could stem from bad/unexpected data in the database, middle-tier cod

Answer 1

First I try to understand the bug, then I do all things you suggest, in order based on gut feeling. This is really a trade-off of how certain you are of a specific cause, and how easy that is to test.

In addition, when I investigate a cause I try to directly add the really quick checks as I'm inspecting the code anyway (add some temporary debug output statements, add asserts and such)