Object literal with spread property does not correctly overwrite properties

[samwgoldman]

var o1 = { foo: 0 };
var o2 = { ...o1, foo: "" };
var foo = o2.foo;

foo is number | string, instead of string.

[samwgoldman]

Hunting/blaming around the source makes me think @mroch might have some upcoming changes/wip here?

[chenglou]

Any news on this?

[adimit]

See also: #6108, #6800, and probably many more; the problem has been cropping up quite a bit and cause erroneous typing rejections when the object types aren't inferred.

[villesau]

@samwgoldman made a PR that fixes this: #7298

[nmote]

This has the expected behavior on master