svoid test_leftArrowScriptParseErrors() {
  new GazelleV_LeftArrowScriptParser parser;
  var e = assertFail(-> parser.parse("unknownIdentifier"));
  var inner = innerExceptionOfType(GazelleV_LeftArrowScriptParser.UnknownObject.class, e);
  assertEqualsVerbose("unknownIdentifier", inner.name);
  
  // missing expression after assignment
  assertFail(-> parser.parse("a <-"));
}