From 24b2d17bb0efc4614ebee2515fd32299543aeaa0 Mon Sep 17 00:00:00 2001
From: Daniel Grunwald <daniel@danielgrunwald.de>
Date: Sat, 26 Mar 2022 18:05:00 +0100
Subject: [PATCH] Fix #2582: Assertion when using named arguments in a
 constrained call

(cherry picked from commit ced6ed445adf1b1165ae74f2723314fafd70dc4b)
---
 ICSharpCode.Decompiler/IL/Transforms/NamedArgumentTransform.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ICSharpCode.Decompiler/IL/Transforms/NamedArgumentTransform.cs b/ICSharpCode.Decompiler/IL/Transforms/NamedArgumentTransform.cs
index d2c5c400c..41e30e598 100644
--- a/ICSharpCode.Decompiler/IL/Transforms/NamedArgumentTransform.cs
+++ b/ICSharpCode.Decompiler/IL/Transforms/NamedArgumentTransform.cs
@@ -98,7 +98,7 @@ namespace ICSharpCode.Decompiler.IL.Transforms
 				namedArgBlock.FinalInstruction = call;
 				if (call.IsInstanceCall)
 				{
-					IType thisVarType = call.Method.DeclaringType;
+					IType thisVarType = call.ConstrainedTo ?? call.Method.DeclaringType;
 					if (CallInstruction.ExpectedTypeForThisPointer(thisVarType) == StackType.Ref)
 					{
 						thisVarType = new ByReferenceType(thisVarType);