No related error spans return for type assignment mismatch

[mjbvz]

TypeScript Version: 3.1.0-dev.20180802

Search Terms:

• relatedInformation
• related diagnostics

Code
For the ts:

let b: number = 1
b = ''

Expected behavior:
relatedInformation is returned on the assignment of b = '' (#25030)

Actual behavior:
No relatedInformation

Playground Link:

Related Issues:

[mhegazy]

it is expected to be on the properties. e.g.:

type SomeType = { a: number; b: string };

var x: SomeType = {
    a: "",
    b: ""
}

[mhegazy]

I suppose we can look at the error node and deduce it is an assignment, then put the related span with the declaration as well.