Github user shivaram commented on the issue:
https://github.com/apache/spark/pull/13295
@mhnatiuk It looks like the tests are failing with the error message I've
pasted below. From reading the code I think this is related to the `if` check
we have in the pivot implementation where it should be `length(values) !=
length(unique(values))` instead of `==` as we have right now ?
```
1. Error: pivot GroupedData column
---------------------------------------------
error in evaluating the argument 'x' in selecting a method for function
'collect':
error in evaluating the argument 'x' in selecting a method for function
'summarize':
Values in list are not unique
Calls: pivot -> pivot
```
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