Disable flakey test

We get occasional failures of the form

java.lang.AssertionError: assertion failed: asTerm called on not-a-Term val <none> while compiling tests/pos/projections.scala
Fatal compiler crash when compiling: tests/pos/projections.scala:
assertion failed: asTerm called on not-a-Term val <none>
dotty.DottyPredef$.assertFail(DottyPredef.scala:17)
dotty.tools.dotc.core.Symbols$Symbol.asTerm(Symbols.scala:156)

when compiling pos/projections.scala with FromTasty tests.

It was first observed when we parallelized position pickling, so it might have something to do with that.

Author: odersky

compiler/test/dotc/pos-from-tasty.blacklist

@@ -13,3 +13,7 @@ i7087.scala
 # Nullability
 nullable.scala
 notNull.scala
+
+# Flakey behavior
+projections.scala
+