When adding multiple integer fields together in a formula tool, if one of the integer values is Null, the output for that record will be 0. For example, if the formula is [Field_A] + [Field_B] + [Field_C], if the values for one record are 5 + Null + 8, the output will be 0. All in all, this makes sense, as a Null isn't defined as a number in any way - it's like trying to evaluate 5 + potato. However, there is no error or warning indicating that this is taking place when the workflow is run, it just passes silently.
Is there any way to have this behavior reported as a warning or conversion error when it happens? Again, the behavior itself makes sense, but it would be great to get a little heads up when it's happening.