Not exist properties when inheritance

[mjbvz]

From @PixelT on November 1, 2017 23:36

I have written a small code with inheritance:

The result is:

'Property 'name' does not exist on type' (x2)
'Property 'age' does not exist on type'

The suggestion also doesn't show this inheritance properties:

For example, on PHPStorm:

Example code to reproduce issue:

// @ts-check
function Person(name, surname, age) {
    this.name = {
        name,
        surname
    };
    this.age = age;
}

Person.prototype.info = function () {
    console.log('Person data: ' + this.name.name + ' ' + this.name.surname + ', ' + this.age);
}

function Teacher(name, surname, age, subject) {
    Person.call(this, name, surname, age);
    this.subject = subject;
}
Teacher.prototype = Object.create(Person.prototype);
Teacher.prototype.constructor = Teacher;

Teacher.prototype.info = function() {
    console.log('Teacher data: ' + this.name.name + ' ' + this.name.surname + ', ' + this.age);
}

var x = new Person('Johny', 'Walker', 30);
var z = new Teacher('Johny2', 'Walker2', 55);

Copied from original issue: microsoft/vscode#37452

[mjbvz]

Possible dup of #13206