match! breaks structure guidelines and collapsible nodes

[kerams]

Structure guidelines and collapsible nodes below a match! are missing.

Repro steps

let blah = async {
    match! async { return Some 1 } with
    | Some _ -> ()
    | None ->
        if true then
            if true then
                if true then
                    () }

Expected behavior

Structure guidelines and collapsible nodes are present.

Actual behavior

Known workarounds

None.

Related information

Provide any related information

VS 2017.8 Preview 5

[cartermp]

I have a fix for this, but cannot verify it due to #5465

[cartermp]

Fixed