Using ThreadPoolTaskSupport causes test to hang #7236
While Joel and I bootstrapped and tested Scala on Avian, we both encountered that the test suite hangs in test/files/scalacheck/parallel-collections.
This seems to be an issue on Scala's side: Joel discovered that the same also happens on Hotspot when using ThreadPoolTaskSupport:
It looks like ThreadPoolTaskSupport is broken on all VMs.
Thread on the Avian mailing list: https://groups.google.com/d/msg/avian/Hugny4JcnDw/shb3r-3BOR8J
Thread on the Scala mailing list: https://groups.google.com/d/msg/scala-internals/7N-7HzoH8tM/9mx4bZd4JfoJ
Joel's thread dump is attached.
I'll open a separate issue for the insufficient task support detection mechanism.
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Imported From: https://issues.scala-lang.org/browse/SI-7236?orig=1