No IntelliSense for second dot of shorthand lambda syntax

[Happypig375]

Repro steps

System.Guid()
|> _.Variant.

Expected behavior

IntelliSense completion shows.

Actual behavior

No IntelliSense completion.

Known workarounds

Don't use this feature at the second dot?

Related information

Provide any related information (optional):

• Operating system Windows
• .NET Runtime kind (.NET Core, .NET Framework, Mono) N/A
• Editing Tools (e.g. Visual Studio Version, Visual Studio) Visual Studio 17.12.3

[charlesroddie]

The ability to chain properties was in the RFC https://github.com/fsharp/fslang-design/blob/main/FSharp-8.0/FS-1129-shorthand-anonymous-unary-functions.md but is an example of feature overreach. It expanded since the suggestion fsharp/fslang-suggestions#506 .

The RFC PR looks to have been improperly merged. It contains a list of additional features, including this one, which were specifically questioned by @dsyme in fsharp/fslang-design#710 with the comment "I do wonder if we should just go simple and only allow _.Foo for now". But the PR was merged anyway with no discussion of this comment.

I think everything beyond _.Foo should be treated as an unfortunate mistake.