SignatureOnlyParameterSymbol.ContainingSymbol throws

dotnet · Feb 14, 2021 · a3f324d · a3f324d
1 parent 9c99cbc
commit a3f324d
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/Compilers/CSharp/Portable/SymbolDisplay/SymbolDisplayVisitor.Members.cs b/src/Compilers/CSharp/Portable/SymbolDisplay/SymbolDisplayVisitor.Members.cs
@@ -678,7 +678,9 @@ public override void VisitParameter(IParameterSymbol symbol)
             // (e.g. field types, param types, etc), which just want the name whereas parameters are
             // used on their own or in the context of methods.
 
-            var isFunctionPointerParameter = symbol.ContainingSymbol is IMethodSymbol { MethodKind: MethodKind.FunctionPointerSignature };
+            // SignatureOnlyParameterSymbol.ContainingSymbol throws.
+            var isFunctionPointerParameter = symbol is not Microsoft.CodeAnalysis.CSharp.Symbols.PublicModel.Symbol { UnderlyingSymbol: SignatureOnlyParameterSymbol }
+                && symbol.ContainingSymbol is IMethodSymbol { MethodKind: MethodKind.FunctionPointerSignature };
             var includeType = format.ParameterOptions.IncludesOption(SymbolDisplayParameterOptions.IncludeType)
                 || isFunctionPointerParameter;
             var includeName = format.ParameterOptions.IncludesOption(SymbolDisplayParameterOptions.IncludeName)