src/vs/workbench/contrib/tasks/common/jsonSchema_v2.ts/updateProblemMatchers
export function updateProblemMatchers() {
	try {
		const matcherIds = ProblemMatcherRegistry.keys().map(key => '$' + key);
		definitions.problemMatcherType2.oneOf![0].enum = matcherIds;
		(definitions.problemMatcherType2.oneOf![2].items as IJSONSchema).anyOf![0].enum = matcherIds;
	} catch (err) {
		console.log('Installing problem matcher ids failed');
	}
}