Prepare for the removal of TypeTag.UNKNOWN
#4642
Merged
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Prepare for the removal of
TypeTag.UNKNOWN
The constant was removed as part of https://bugs.openjdk.org/browse/JDK-8339296
This is a minimal fix to avoid breaking for upcoming javac versions. I suspect this logic isn't actually necessary, we aren't supposed to process ASTs with errors and there have been a variety of improvements in how that's handled since this was added.