Dealias nextBinderTp for type test patterns in MatchTranslation
#10457
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For scala/bug#12814 - follow-up for #10247
Not sure if this is worth it though. The code pattern seems prone to "cyclic aliasing" errors. Maybe the underlying issue can be fixed, possibly the
checkNonCyclicimplementation is not right. InP1/P2etc, the symbol that triggers the cycle isF.T, which is involved twice (O.TandP1.T).