processDirectory returns broken promise

[mahnunchik]

processDirectory returns broken promise:

core/src/core.js

Lines 126 to 143 in 4924481

	processDirectory(path) {
	let that = this;
	return vfs.listDir(path).then(function(filenames) {
	return vow.all(filenames.map(function(filename) {
	let fullname = path + '/' + filename;
	return vfs.stat(fullname).then(function(stat) {
	if (stat.isDirectory() && that._shouldProcess(fullname)) {
	return that.processDirectory(fullname);
	} else {
	return that.processFile(fullname);
	}
	});
	})).then(function(results) {
	return [].concat.apply([], results);
	});
	});
	}