Namespaces are highlighted as symbols when module name is a substring of a namespace

[nosami]

In the screenshot below, we have a module named Test and a namespace Test.Namespace. The open Test.Namespace statement is highlighted incorrectly. It looks as if checkResults.GetSemanticClassification(range) is returning incorrect colorization. Probably related to this PR https://github.com/Microsoft/visualfsharp/pull/3932/files

I haven't tested in VS on Windows yet, but I would assume that it has the same issue.

Repro steps

Paste this code into an editor

namespace Test.Namespace
module Test = ()
open Test
namespace Test.Namespace
open Test.Namespace

Expected behavior

open Test.Namespace shouldn't be highlighted any differently to any other namespace.

Actual behavior

Test is highlighted as if it were the Test module

[auduchinok]

Dupe of #4658?

[nosami]

@auduchinok : Looks like it could be the same issue. Not 100% sure yet.

[cartermp]

This doesn't resolve anymore for me in 16.6 + #9511 (classification likely had nothing to do with this)