scala.MatchError during parsing

[theosotr]

Compiler version

3.5.1

Minimized code

class A(val into: Boolean) {
  def m1(): Any =
    into

  def m2(): Int = 1
}

Output (click arrow to expand)

�[31m�[31m-- [E040] Syntax Error: program.scala:5:0 -----------------------------------------------------�[0m�[0m
�[31m5 |�[0m  �[33mdef�[0m �[36mm2�[0m(): �[35mInt�[0m = �[31m1�[0m
�[31m�[31m  |�[0m^^^�[0m
�[31m  |�[0m'}' expected, but 'end of statement' found
Exception in thread "main" scala.MatchError: into (of class dotty.tools.dotc.core.Names$SimpleName)
	at dotty.tools.dotc.parsing.Parsers$Parser.modOfToken(Parsers.scala:3223)
	at dotty.tools.dotc.parsing.Parsers$Parser.addModifier(Parsers.scala:3241)
	at dotty.tools.dotc.parsing.Parsers$Parser.loop$1(Parsers.scala:3302)
	at dotty.tools.dotc.parsing.Parsers$Parser.modifiers(Parsers.scala:3310)
	at dotty.tools.dotc.parsing.Parsers$Parser.defAnnotsMods(Parsers.scala:3345)
	at dotty.tools.dotc.parsing.Parsers$Parser.localDef(Parsers.scala:4559)
	at dotty.tools.dotc.parsing.Parsers$Parser.blockStatSeq$$anonfun$1(Parsers.scala:4595)
	at dotty.tools.dotc.parsing.Parsers$Parser.checkNoEscapingPlaceholders(Parsers.scala:528)
	at dotty.tools.dotc.parsing.Parsers$Parser.blockStatSeq(Parsers.scala:4601)
	at dotty.tools.dotc.parsing.Parsers$Parser.block(Parsers.scala:2865)
	at dotty.tools.dotc.parsing.Parsers$Parser.blockExpr$$anonfun$1(Parsers.scala:2857)
	at dotty.tools.dotc.parsing.Parsers$Parser.enclosed(Parsers.scala:592)
	at dotty.tools.dotc.parsing.Parsers$Parser.inBracesOrIndented(Parsers.scala:622)
	at dotty.tools.dotc.parsing.Parsers$Parser.inDefScopeBraces(Parsers.scala:628)
	at dotty.tools.dotc.parsing.Parsers$Parser.blockExpr(Parsers.scala:2855)
	at dotty.tools.dotc.parsing.Parsers$Parser.simpleExpr(Parsers.scala:2692)
	at dotty.tools.dotc.parsing.Parsers$Parser.$init$$$anonfun$9(Parsers.scala:2645)
	at dotty.tools.dotc.parsing.Parsers$Parser.postfixExpr(Parsers.scala:2621)
	at dotty.tools.dotc.parsing.Parsers$Parser.expr1(Parsers.scala:2463)
	at dotty.tools.dotc.parsing.Parsers$Parser.expr(Parsers.scala:2353)
	at dotty.tools.dotc.parsing.Parsers$Parser.$init$$$anonfun$8(Parsers.scala:2322)
	at dotty.tools.dotc.parsing.Parsers$Parser.subPart(Parsers.scala:692)
	at dotty.tools.dotc.parsing.Parsers$Parser.subExpr(Parsers.scala:2324)
	at dotty.tools.dotc.parsing.Parsers$Parser.defDefOrDcl(Parsers.scala:3896)
	at dotty.tools.dotc.parsing.Parsers$Parser.defOrDcl(Parsers.scala:3772)
	at dotty.tools.dotc.parsing.Parsers$Parser.templateStatSeq$$anonfun$1(Parsers.scala:4509)
	at dotty.tools.dotc.parsing.Parsers$Parser.checkNoEscapingPlaceholders(Parsers.scala:528)
	at dotty.tools.dotc.parsing.Parsers$Parser.templateStatSeq(Parsers.scala:4517)
	at dotty.tools.dotc.parsing.Parsers$Parser.$anonfun$39(Parsers.scala:4392)
	at dotty.tools.dotc.parsing.Parsers$Parser.enclosed(Parsers.scala:592)
	at dotty.tools.dotc.parsing.Parsers$Parser.inBraces(Parsers.scala:611)
	at dotty.tools.dotc.parsing.Parsers$Parser.inBracesOrIndented(Parsers.scala:625)
	at dotty.tools.dotc.parsing.Parsers$Parser.inDefScopeBraces(Parsers.scala:628)
	at dotty.tools.dotc.parsing.Parsers$Parser.templateBody(Parsers.scala:4392)
	at dotty.tools.dotc.parsing.Parsers$Parser.templateBodyOpt(Parsers.scala:4385)
	at dotty.tools.dotc.parsing.Parsers$Parser.template(Parsers.scala:4362)
	at dotty.tools.dotc.parsing.Parsers$Parser.templateOpt(Parsers.scala:4374)
	at dotty.tools.dotc.parsing.Parsers$Parser.classDefRest(Parsers.scala:4031)
	at dotty.tools.dotc.parsing.Parsers$Parser.classDef(Parsers.scala:4026)
	at dotty.tools.dotc.parsing.Parsers$Parser.tmplDef(Parsers.scala:4002)
	at dotty.tools.dotc.parsing.Parsers$Parser.defOrDcl(Parsers.scala:3778)
	at dotty.tools.dotc.parsing.Parsers$Parser.topStatSeq(Parsers.scala:4449)
	at dotty.tools.dotc.parsing.Parsers$Parser.topstats$1(Parsers.scala:4637)
	at dotty.tools.dotc.parsing.Parsers$Parser.compilationUnit$$anonfun$1(Parsers.scala:4642)
	at dotty.tools.dotc.parsing.Parsers$Parser.checkNoEscapingPlaceholders(Parsers.scala:528)
	at dotty.tools.dotc.parsing.Parsers$Parser.compilationUnit(Parsers.scala:4647)
	at dotty.tools.dotc.parsing.Parsers$Parser.parse(Parsers.scala:201)
	at dotty.tools.dotc.parsing.Parser.parse$$anonfun$1(ParserPhase.scala:32)
	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
	at dotty.tools.dotc.core.Phases$Phase.monitor(Phases.scala:503)
	at dotty.tools.dotc.parsing.Parser.parse(ParserPhase.scala:40)
	at dotty.tools.dotc.parsing.Parser.$anonfun$2(ParserPhase.scala:52)
	at scala.collection.Iterator$$anon$6.hasNext(Iterator.scala:479)
	at scala.collection.Iterator$$anon$9.hasNext(Iterator.scala:583)
	at scala.collection.immutable.List.prependedAll(List.scala:152)
	at scala.collection.immutable.List$.from(List.scala:685)
	at scala.collection.immutable.List$.from(List.scala:682)
	at scala.collection.IterableOps$WithFilter.map(Iterable.scala:900)
	at dotty.tools.dotc.parsing.Parser.runOn(ParserPhase.scala:51)
	at dotty.tools.dotc.Run.runPhases$1$$anonfun$1(Run.scala:343)
	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
	at scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1323)
	at dotty.tools.dotc.Run.runPhases$1(Run.scala:336)
	at dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:384)
	at dotty.tools.dotc.Run.compileUnits$$anonfun$adapted$1(Run.scala:396)
	at dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:69)
	at dotty.tools.dotc.Run.compileUnits(Run.scala:396)
	at dotty.tools.dotc.Run.compileSources(Run.scala:282)
	at dotty.tools.dotc.Run.compile(Run.scala:267)
	at dotty.tools.dotc.Driver.doCompile(Driver.scala:37)
	at dotty.tools.dotc.Driver.process(Driver.scala:201)
	at dotty.tools.dotc.Driver.process(Driver.scala:169)
	at dotty.tools.dotc.Driver.process(Driver.scala:181)
	at dotty.tools.dotc.Driver.main(Driver.scala:211)
	at dotty.tools.MainGenericCompiler$.run$1(MainGenericCompiler.scala:162)
	at dotty.tools.MainGenericCompiler$.main(MainGenericCompiler.scala:186)
	at dotty.tools.MainGenericCompiler.main(MainGenericCompiler.scala)

[dwijnand]

Thalia strikes again (I assume)! 😄