parseUnit(hello)
  skipErrorTokens(hello)
  listener: beginCompilationUnit(hello)
  syntheticPreviousToken(hello)
  parseTopLevelDeclarationImpl(, Instance of 'DirectiveContext')
    parseMetadataStar()
      listener: beginMetadataStar(hello)
      listener: endMetadataStar(0)
    parseTopLevelMemberImpl()
      listener: beginTopLevelMember(hello)
      isReservedKeyword()
      parseFields(, null, null, null, null, null, null, , Instance of 'NoType', hello, DeclarationKind.TopLevel, null, false)
        listener: beginFields()
        reportRecoverableError(hello, MissingConstFinalVarOrType)
          listener: handleRecoverableError(MissingConstFinalVarOrType, hello, hello)
        listener: handleNoType()
        ensureIdentifierPotentiallyRecovered(, topLevelVariableDeclaration, false)
          listener: handleIdentifier(hello, topLevelVariableDeclaration)
        parseFieldInitializerOpt(hello, hello, null, null, null, null, DeclarationKind.TopLevel, null)
          listener: handleNoFieldInitializer()
        ensureSemicolon(hello)
          reportRecoverableError(hello, Message[ExpectedAfterButGot, Expected ';' after this., null, {string: ;}])
            listener: handleRecoverableError(Message[ExpectedAfterButGot, Expected ';' after this., null, {string: ;}], hello, hello)
          rewriter()
        listener: endTopLevelFields(null, null, null, null, null, 1, hello, ;)
  listener: endTopLevelDeclaration()
  reportAllErrorTokens(hello)
  listener: endCompilationUnit(1, )