Function forwardReaderError

examples/io/streams/modules/streams.js:1099–1110

(thisReader)

	let branch2;
	let cancelPromise = createPromise();
	function forwardReaderError(thisReader) {
		thisReader.closedPromise.promise.catch(r => {
			if (thisReader !== reader) {
				return;
			}
			ReadableByteStreamControllerError(branch1.controller, r);
			ReadableByteStreamControllerError(branch2.controller, r);
			if (canceled1 === false || canceled2 === false) {
				resolvePromise(cancelPromise, undefined);
			}
		});
	}
	function pullWithDefaultReader() {
		if (ReadableStreamBYOBReaderBrand.has(reader.self)) {
			assert(reader.readIntoRequests.length === 0);