

I once had a QA engineer file a bug saying they couldn’t do negative testing since negative numbers were converted to positive.
The function took an unsigned integer. Took a lot of explaining to get them to understand that negative testing isn’t necessarily negative numbers.
For something end-user facing: I could understand this argument.
In this case they were more or less just calling a C function that had an unsigned long long as the parameter they were setting negative.
The whole ‘bug’ was that the other side of the function call was seeing a positive number no matter what.
The real situation was a bit more complicated, but that’s the gist.