Github user hvanhovell commented on the pull request:
https://github.com/apache/spark/pull/9409#issuecomment-154831183
@yhuai can you get jenkins to test this?
The bug exposed by this patch affected the regular aggregation path, as
soon as we used more than one regular aggregate, the chance existed that an
attribute and its source expression got misaligned. This has been fixed. I have
also added a test for this situation.
If we choose not to add this to the 1.6 branch, then we have to create a
separte PR containing only the bugfix and get that one in.
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