parseUnit(UnterminatedToken(UnterminatedComment))
  skipErrorTokens(UnterminatedToken(UnterminatedComment))
  listener: beginCompilationUnit()
  syntheticPreviousToken()
  reportAllErrorTokens(UnterminatedToken(UnterminatedComment))
    listener: handleErrorToken(UnterminatedToken(UnterminatedComment))
    listener: handleRecoverableError(UnterminatedComment, UnterminatedToken(UnterminatedComment), UnterminatedToken(UnterminatedComment))
  listener: endCompilationUnit(0, )