AssertionError in tpd.newArray on new Array of opaque type

[panacekcz]

In the companion object of an opaque type T, creating an array using new Array[T] causes an assertion error. Seems to work outside the companion.
Code:

object A {
  opaque type T = Int
  object T{
    val a = new Array[T](3)
  }
}

Output:

exception occurred while compiling opaque-array.scala
java.lang.AssertionError: assertion failed while compiling opaque-array.scala
Exception in thread "main" java.lang.AssertionError: assertion failed
        at scala.Predef$.assert(Predef.scala:208)
        at dotty.tools.dotc.ast.tpd$.newArray(tpd.scala:410)
        at dotty.tools.dotc.transform.ArrayConstructors.expand$1(ArrayConstructors.scala:29)
        at dotty.tools.dotc.transform.ArrayConstructors.transformApply(ArrayConstructors.scala:33)
        at dotty.tools.dotc.transform.MegaPhase.goApply(MegaPhase.scala:611)
        at dotty.tools.dotc.transform.MegaPhase.goApply(MegaPhase.scala:612)
        at dotty.tools.dotc.transform.MegaPhase.goApply(MegaPhase.scala:612)
        at dotty.tools.dotc.transform.MegaPhase.goApply(MegaPhase.scala:612)
        at dotty.tools.dotc.transform.MegaPhase.goApply(MegaPhase.scala:612)
        at dotty.tools.dotc.transform.MegaPhase.transformUnnamed$1(MegaPhase.scala:272)
        at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:396)
        at dotty.tools.dotc.transform.MegaPhase.mapValDef$1(MegaPhase.scala:234)
        at dotty.tools.dotc.transform.MegaPhase.transformNamed$1(MegaPhase.scala:238)
        at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:394)
        at dotty.tools.dotc.transform.MegaPhase.transformStat$1(MegaPhase.scala:404)
        at dotty.tools.dotc.transform.MegaPhase.$anonfun$transformStats$2(MegaPhase.scala:409)
        at scala.collection.immutable.List.mapConserve(List.scala:179)
        at dotty.tools.dotc.transform.MegaPhase.transformStats(MegaPhase.scala:409)
        at dotty.tools.dotc.transform.MegaPhase.transformUnnamed$1(MegaPhase.scala:339)
        at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:396)
        at dotty.tools.dotc.transform.MegaPhase.transformNamed$1(MegaPhase.scala:251)
        at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:394)
        at dotty.tools.dotc.transform.MegaPhase.transformStat$1(MegaPhase.scala:404)
        at dotty.tools.dotc.transform.MegaPhase.$anonfun$transformStats$2(MegaPhase.scala:409)
        at scala.collection.immutable.List.mapConserve(List.scala:179)
        at dotty.tools.dotc.transform.MegaPhase.transformStats(MegaPhase.scala:409)
        at dotty.tools.dotc.transform.MegaPhase.transformUnnamed$1(MegaPhase.scala:339)
        at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:396)
        at dotty.tools.dotc.transform.MegaPhase.transformNamed$1(MegaPhase.scala:251)
        at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:394)
        at dotty.tools.dotc.transform.MegaPhase.transformStat$1(MegaPhase.scala:404)
        at dotty.tools.dotc.transform.MegaPhase.$anonfun$transformStats$2(MegaPhase.scala:409)
        at scala.collection.immutable.List.mapConserve(List.scala:179)
        at dotty.tools.dotc.transform.MegaPhase.transformStats(MegaPhase.scala:409)
        at dotty.tools.dotc.transform.MegaPhase.mapPackage$1(MegaPhase.scala:356)
        at dotty.tools.dotc.transform.MegaPhase.transformUnnamed$1(MegaPhase.scala:359)
        at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:396)
        at dotty.tools.dotc.transform.MegaPhase.transformUnit(MegaPhase.scala:415)
        at dotty.tools.dotc.transform.MegaPhase.run(MegaPhase.scala:427)
        at dotty.tools.dotc.core.Phases$Phase.$anonfun$runOn$1(Phases.scala:316)
        at scala.collection.immutable.List.map(List.scala:286)
        at dotty.tools.dotc.core.Phases$Phase.runOn(Phases.scala:314)
        at dotty.tools.dotc.Run.$anonfun$compileUnits$3(Run.scala:158)
        at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at dotty.tools.dotc.util.Stats$.trackTime(Stats.scala:49)
        at dotty.tools.dotc.Run.$anonfun$compileUnits$2(Run.scala:155)
        at dotty.tools.dotc.Run.$anonfun$compileUnits$2$adapted(Run.scala:153)
        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$1(Run.scala:153)
        at dotty.tools.dotc.Run.$anonfun$compileUnits$1(Run.scala:178)
        at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:102)
        at dotty.tools.dotc.Run.compileUnits(Run.scala:133)
        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:33)
        at dotty.tools.dotc.Driver.process(Driver.scala:170)
        at dotty.tools.dotc.Driver.process(Driver.scala:139)
        at dotty.tools.dotc.Driver.process(Driver.scala:151)
        at dotty.tools.dotc.Driver.main(Driver.scala:178)
        at dotty.tools.dotc.Main.main(Main.scala)