maxNumIterations

The maximum number of terms permitted when evaluating the incomplete gamma function for this distribution.

The value is stored as supplied. A number smaller than the default is a genuine instruction to spend less work, and a computation that cannot finish within it throws rather than quietly taking more: the caller asked for a bound and gets one. Setting this below what the shape requires is a way to make a working call start failing, which is the only reason to lower it.

Previously any value below DEFAULT_MAX_ITERATIONS was silently replaced by that default, so the property could be raised but never lowered. Callers who depended on that -- assigning zero or a negative number and receiving the default -- now get an exception at the assignment.