Semantic model lookup inside crefs does not use cref rules (i.e. ignore accessibility)

Description

<Fact(Skip:="1104815")>
Public Sub CrefLookup()
Dim source =
<compilation name="AssemblyName">
<file name="a.vb">
<![CDATA[
''' <summary>
''' See <see cref="C(Of U)" />
''' </summary>
Class C(Of T)
Sub M()
End Sub
End Class
Class Outer
Private Class Inner
End Class
End Class
]]>
</file>
</compilation>
Dim comp = CompileCheckDiagnosticsAndXmlDocument(source, <errors/>)
Dim syntaxTree = comp.SyntaxTrees(0)
Dim model = comp.GetSemanticModel(syntaxTree)
Dim outer = comp.GlobalNamespace.GetMember(Of NamedTypeSymbol)("Outer")
Dim inner = outer.GetMember(Of NamedTypeSymbol)("Inner")
Dim position = syntaxTree.ToString().IndexOf("(Of U)")
Assert.Equal(inner, model.LookupSymbols(position, outer, inner.Name).Single())
End Sub

Contributor guide

Tech stack

csharp

Domain

apitooling

Issue type

bug

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

half day

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

stale

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

clear

Prerequisites

Roslyn compiler internalsVB languagecref resolution

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

30

Research direction

Investigate the test in BasicCompilerSymbolTest (the CrefLookup method). Understand how semantic model LookupSymbols handles cref rules, particularly accessibility ignored for crefs. Check the comment referencing issue 1104815 and any related changes in the Roslyn codebase. The fix likely involves modifying the semantics to correctly ignore accessibility when looking up symbols in crefs.