Default params crash the compiler when calling the function without some arguments

[anatoliykmetyuk]

minimized code

class Foo
  def f(x: Int, y: Int = 1) = ???

object bar extends Foo
  f()

Stack trace

exception occurred while typechecking /Users/kmetiuk/Projects/scala3/pg/sandbox/iss7.scala
exception occurred while compiling /Users/kmetiuk/Projects/scala3/pg/sandbox/iss7.scala
java.lang.AssertionError: assertion failed: non-existent getter denotation (val <none>) for getter(f$default$1) while compiling /Users/kmetiuk/Projects/scala3/pg/sandbox/iss7.scala
Exception in thread "main" java.lang.AssertionError: assertion failed: non-existent getter denotation (val <none>) for getter(f$default$1)
	at dotty.DottyPredef$.assertFail(DottyPredef.scala:17)
	at dotty.tools.dotc.typer.Applications.dotty$tools$dotc$typer$Applications$Application$$_$findGetter$1(Applications.scala:488)
	at dotty.tools.dotc.typer.Applications$Application.findDefaultGetter(Applications.scala:494)
	at dotty.tools.dotc.typer.Applications$Application.tryDefault$1(Applications.scala:567)
	at dotty.tools.dotc.typer.Applications$Application.matchArgs(Applications.scala:605)
	at dotty.tools.dotc.typer.Applications$Application.init(Applications.scala:354)
	at dotty.tools.dotc.typer.Applications$TypedApply.<init>(Applications.scala:694)
	at dotty.tools.dotc.typer.Applications$ApplyToTyped.<init>(Applications.scala:804)
	at dotty.tools.dotc.typer.Applications.simpleApply$1(Applications.scala:867)
	at dotty.tools.dotc.typer.Applications.realApply$7$$anonfun$6(Applications.scala:931)
	at dotty.tools.dotc.typer.Typer.tryEither(Typer.scala:2368)
	at dotty.tools.dotc.typer.Applications.realApply$1(Applications.scala:942)
	at dotty.tools.dotc.typer.Applications.typedApply(Applications.scala:977)
	at dotty.tools.dotc.typer.Typer.typedApply(Typer.scala:83)
	at dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2144)
	at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2202)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2240)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2252)
	at dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:2296)
	at dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:2318)
	at dotty.tools.dotc.typer.Typer.typedClassDef(Typer.scala:1805)
	at dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:2134)
	at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2201)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2240)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2252)
	at dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:2274)
	at dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:2318)
	at dotty.tools.dotc.typer.Typer.typedPackageDef(Typer.scala:1931)
	at dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2175)
	at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2202)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2240)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2252)
	at dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:2360)
	at dotty.tools.dotc.typer.FrontEnd.liftedTree1$2(FrontEnd.scala:78)
	at dotty.tools.dotc.typer.FrontEnd.typeCheck$$anonfun$1(FrontEnd.scala:83)
	at dotty.runtime.function.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
	at dotty.tools.dotc.typer.FrontEnd.monitor(FrontEnd.scala:42)
	at dotty.tools.dotc.typer.FrontEnd.typeCheck(FrontEnd.scala:84)
	at dotty.tools.dotc.typer.FrontEnd.runOn$$anonfun$3(FrontEnd.scala:114)
	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:305)
	at dotty.tools.dotc.typer.FrontEnd.runOn(FrontEnd.scala:114)
	at dotty.tools.dotc.Run.runPhases$4$$anonfun$4(Run.scala:167)
	at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:15)
	at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:10)
	at scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1323)
	at dotty.tools.dotc.Run.runPhases$5(Run.scala:177)
	at dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:185)
	at dotty.runtime.function.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
	at dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:65)
	at dotty.tools.dotc.Run.compileUnits(Run.scala:192)
	at dotty.tools.dotc.Run.compileSources(Run.scala:129)
	at dotty.tools.dotc.Run.compile(Run.scala:112)
	at dotty.tools.dotc.Driver.doCompile(Driver.scala:36)
	at dotty.tools.dotc.Driver.process(Driver.scala:189)
	at dotty.tools.dotc.Driver.process(Driver.scala:158)
	at dotty.tools.dotc.Driver.process(Driver.scala:170)
	at dotty.tools.dotc.Driver.main(Driver.scala:197)
	at dotty.tools.dotc.Main.main(Main.scala)
[error] Nonzero exit code returned from runner: 1
[error] (dotty-compiler / Compile / runMain) Nonzero exit code returned from runner: 1
[error] Total time: 4 s, completed Jan 15, 2020 4:31:35 PM