Cannot assign to read only property of object

I have such error: Cannot assign to read only property 'name' of object '#<Category>' when I use non initialized properties decorated with decorators and then trying to assign values to these properties.

import {Entity, PrimaryColumn, Column} from "typeorm";

@Entity()
export class Category {

    @PrimaryColumn("int", { generated: true })
    id;

    @Column("string")
    name;

}

Solution is to do it this way:

import {Entity, PrimaryColumn, Column} from "typeorm";

@Entity()
export class Category {

    @PrimaryColumn("int", { generated: true })
    id = undefined;

    @Column("string")
    name = "";

}

Which is ugly. I guess the reason is that it does not make descriptor writable. Is there any better solution for this problem?

[loganfsmyth]

You are right, I tried both to make sure and then copy-pasted the wrong one.

I am able to reproduce with es2015. Thanks for the info.

[chbdetta]

Is this solved?