VS2017 RC regression - Record name completions not always shown

[dsyme]

VS2017 RC no longer shows record name completions in some situations

Repro steps

Take the code

type A = { XXX : int; YYY: int }

let f () = { XXX=1; YY

Complete after YY using Ctrl-Space or Ctrl-J.

Expected behavior

The completion YYY is offered

Actual behaviour

In VS2017 RC, no completion is offered. In VS2013-15, the completion was correctly offered.

[dsyme]

Fixed by #1816. Tested manually (we have many unit tests, but just below the level where we are wiring this up)