Cannot include another grammar's pattern in an includeOnlyRule

[matter123]

Reference repository: https://github.com/matter123/vscode-textmate-include-nested

If a pattern in the grammars repository includes a pattern from another grammar, and a pattern includes that pattern, the other grammar's pattern is not applied.

In the reference repository, grammarA has the pattern #test2 that matches some test pattern. grammarB has the pattern #test2 that includes source.test#test2 (grammarA's pattern). When grammarB includes #test2 (from #test), the grammar does not match some_test_pattern.

[alexdima]

I think the problem lies in the way grammarB includes the rule from grammarA.

Specifically, vscode-textmate expects a patterns property in order to include something:
grammarB.tmLanguage.json:

[matter123]

Textmate sets the scope of some test pattern when grammarB includes source.test#test2 directly.

GrammarB:

{	patterns = (
		{	include = '#test'; },
		{	include = '#embedded'; },
	);
	repository = {
		test = {
			begin = 'testStart';
			end = 'testEnd';
			patterns = ( { include = '#test2'; } );
		};
		'test2' = { include = 'source.test#test2'; };
	};
}