Error span causes refactoring suggestions

[ghost]

• VSCode Version: Code - Insiders 1.17.0-insider (b0c0634, 2017-09-15T05:24:23.107Z)
• OS Version: Windows_NT x64 10.0.15063
• Extensions: none
  TypeScript Version: nightly (2.6.0-dev.20170915)

---

Moving from microsoft/TypeScript#18507 as this looks like a vscode issue.

Code

function f(): number {
    return {
        x: 1,
    }
}

The entire return statement has a red squiggly line under it.
Click anywhere in the error span and there will be a suggestion to refactor to an inner function.
Remove : number and there are no refactoring suggestions.
(Tested in vscode.)

Expected behavior:

Presence of a compile error doesn't cause a refactoring to be suggested.
Especially because it looks exactly like a code fix, but extracting to an inner function won't fix the compile error.

Actual behavior:

It does.
In fact, hovering over the light bulb shows "Show Fixes", but this is a refactoring, not a fix.

[mjbvz]

Pushing this out as it depends on #34664