@Test public void testEmptyGrammarOptions() {
		String[] pair = new String[] {
			"grammar A;\n" +
			"options {}\n" +
			"a : 'x' ;\n",

			""
		};
		testErrors(pair, true);
	}
This is a regression test for antlr/antlr4#194
"NullPointerException on 'options{}' in grammar file"
https://github.com/antlr/antlr4/issues/194
tool-testsuite/test/org/antlr/v4/test/tool/TestToolSyntaxErrors.java