Which GHC is needed to boostrap GHC?
GHC-9.0 is apparently too old
compiler/GHC/Tc/Errors/Ppr.hs:112:25: error:
Type applications in patterns are not yet supported
|
112 | TcRnUnknownMessage (UnknownDiagnostic @e m)
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but ./configure
doesn't tell.
This is the same regression as #22245 (closed)