minimized code
class Foo {
opaque type T = Int
}
Stack trace
scala.MatchError: NoType (of class dotty.tools.dotc.core.Types$NoType$) while compiling Foo.scala
Exception in thread "main" scala.MatchError: NoType (of class dotty.tools.dotc.core.Types$NoType$)
at dotty.tools.dotc.core.tasty.TreePickler.pickleNewType(TreePickler.scala:267)
at dotty.tools.dotc.core.tasty.TreePickler.pickleType(TreePickler.scala:141)
at dotty.tools.dotc.core.tasty.TreePickler.pickleNewType$$anonfun$4(TreePickler.scala:223)
at dotty.runtime.function.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
at dotty.tools.dotc.core.tasty.TreePickler.withLength(TreePickler.scala:44)
at dotty.tools.dotc.core.tasty.TreePickler.pickleNewType(TreePickler.scala:225)
at dotty.tools.dotc.core.tasty.TreePickler.pickleType(TreePickler.scala:141)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$25(TreePickler.scala:526)
at dotty.runtime.function.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
at dotty.tools.dotc.core.tasty.TreePickler.withLength(TreePickler.scala:44)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:530)
at dotty.tools.dotc.core.tasty.TreePickler.pickleDef$$anonfun$2(TreePickler.scala:304)
at dotty.runtime.function.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
at dotty.tools.dotc.core.tasty.TreePickler.withLength(TreePickler.scala:44)
at dotty.tools.dotc.core.tasty.TreePickler.pickleDef(TreePickler.scala:309)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:505)
at dotty.tools.dotc.core.tasty.TreePickler.pickleStats$$anonfun$2(TreePickler.scala:328)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.immutable.List.foreach(List.scala:392)
at dotty.tools.dotc.core.tasty.TreePickler.pickleStats(TreePickler.scala:328)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$27(TreePickler.scala:540)
at dotty.runtime.function.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
at dotty.tools.dotc.core.tasty.TreePickler.withLength(TreePickler.scala:44)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:540)
at dotty.tools.dotc.core.tasty.TreePickler.pickle$$anonfun$1(TreePickler.scala:694)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.immutable.List.foreach(List.scala:392)
at dotty.tools.dotc.core.tasty.TreePickler.pickle(TreePickler.scala:694)
at dotty.tools.dotc.transform.Pickler.run$$anonfun$10$$anonfun$8(Pickler.scala:60)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.immutable.List.foreach(List.scala:392)
at dotty.tools.dotc.transform.Pickler.run$$anonfun$2(Pickler.scala:83)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.immutable.List.foreach(List.scala:392)
at dotty.tools.dotc.transform.Pickler.run(Pickler.scala:83)
at dotty.tools.dotc.core.Phases$Phase.runOn$$anonfun$1(Phases.scala:316)
at scala.collection.immutable.List.map(List.scala:286)
at dotty.tools.dotc.core.Phases$Phase.runOn(Phases.scala:318)
at dotty.tools.dotc.transform.Pickler.runOn(Pickler.scala:87)
at dotty.tools.dotc.Run.runPhases$4$$anonfun$4(Run.scala:158)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.IndexedSeqOptimized.foreach(IndexedSeqOptimized.scala:36)
at scala.collection.IndexedSeqOptimized.foreach$(IndexedSeqOptimized.scala:33)
at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:198)
at dotty.tools.dotc.Run.runPhases$5(Run.scala:170)
at dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:178)
at dotty.runtime.function.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
at dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:102)
at dotty.tools.dotc.Run.compileUnits(Run.scala:185)
at dotty.tools.dotc.Run.compileSources(Run.scala:120)
at dotty.tools.dotc.Run.compile(Run.scala:104)
at dotty.tools.dotc.Driver.doCompile(Driver.scala:34)
at dotty.tools.dotc.Driver.process(Driver.scala:172)
at dotty.tools.dotc.Driver.process(Driver.scala:141)
at dotty.tools.dotc.Driver.process(Driver.scala:153)
at dotty.tools.dotc.Driver.main(Driver.scala:180)
at dotty.tools.dotc.Main.main(Main.scala)
