Move to new file refactoring misses path update for import * paths

[mjbvz]

From microsoft/vscode#50953

TypeScript Version: 3.0.0-dev.20180601

Search Terms:

• Move to new file
• refactoring

Code
For a project

a.ts

export const x = 123

b.ts

import * as a from './a'
console.log(a.x)

1. Run the move to new file refactoring on export const x

Expected behavior:
Unclear what exact behavior should be for b.ts. Perhaps:

import * as a from './a'
import { x } from './x'
console.log(x);

or

import * as a from './a'
import * as x from './x'
console.log(x.x);

Actual behavior:
No update to b.ts. File is now invalid:

b.ts

import * as a from './a'
console.log(a.x)