Pre-save hook silently swallows exception

[mizdler]

It's a bug

What is the current behavior?
pre-save hook silently swallows the exceptions when we don't pass callback to function but according to documentation it shouldn't be a problem: https://mongoosejs.com/docs/middleware.html#error-handling

If the current behavior is a bug, please provide the steps to reproduce.

const Schema = mongoose.Schema;

describe('PreSave', function () {
	it('test pre save', async function () {
		const TestScheme = new Schema({name: String});
		TestScheme.pre('save', function () {
			throw new Error('test err');
		});
		const TestModel = mongoose.model('testModel', TestScheme);
		const testObject = new TestModel({name: 't'});
		try {
			await testObject.save();
		} catch (e) {
			// doesn't reach here!!
		}
	});
});

What is the expected behavior?
We must see the thrown error in catch section.

Node.js: 12.8.3
Mongoose: 5.11.4
MongoDB: 4.0.14