rmuir commented on a change in pull request #586:
URL: https://github.com/apache/lucene/pull/586#discussion_r779116266



##########
File path: 
lucene/analysis.tests/src/test/org/apache/lucene/analysis/tests/TestRandomChains.java
##########
@@ -754,6 +758,7 @@ public String toString() {
       } catch (InvocationTargetException ite) {
         final Throwable cause = ite.getCause();
         if (cause instanceof IllegalArgumentException
+            || cause instanceof NullPointerException

Review comment:
       If we can tighten this logic to be `(cause instanceof 
NullPointerException && weProvidedANullArg)`, I think it would be better. then 
the test wouldn't mask bugs (internal NPEs) that happen for situations where we 
passed the ctor all non-null arguments.




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