Aleksei Dievskii created MATH-1241:
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Summary: Digamma calculation produces SOE on NaN argument
Key: MATH-1241
URL: https://issues.apache.org/jira/browse/MATH-1241
Project: Commons Math
Issue Type: Bug
Affects Versions: 3.5
Reporter: Aleksei Dievskii
Priority: Minor
Digamma doesn't work particularly well with NaNs.
How to reproduce: call Gamma.digamma(Double.NaN)
Expected outcome: returns NaN or throws a meaningful exception
Real outcome: crashes with StackOverflowException, as digamma enters infinite
recursion.
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