From c53b898b55e04cb4b7198f136b1e2dbf8db035be Mon Sep 17 00:00:00 2001
From: Siegfried Pammer <siegfriedpammer@gmail.com>
Date: Sat, 12 May 2018 12:40:17 +0200
Subject: [PATCH] Fix #1122: Error decompiling dictionary initializer
 referencing parameter variable

---
 ICSharpCode.Decompiler/CSharp/ExpressionBuilder.cs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/ICSharpCode.Decompiler/CSharp/ExpressionBuilder.cs b/ICSharpCode.Decompiler/CSharp/ExpressionBuilder.cs
index 9e8bcb83b..2d6d2c096 100644
--- a/ICSharpCode.Decompiler/CSharp/ExpressionBuilder.cs
+++ b/ICSharpCode.Decompiler/CSharp/ExpressionBuilder.cs
@@ -1987,7 +1987,7 @@ namespace ICSharpCode.Decompiler.CSharp
 						break;
 					case IL.Transforms.AccessPathKind.Setter:
 						if (lastElement.Indices?.Length > 0) {
-							var indexer = new IndexerExpression(null, lastElement.Indices.SelectArray(i => Translate(i is LdLoc ld ? indexVariables[ld.Variable] : i).Expression))
+							var indexer = new IndexerExpression(null, lastElement.Indices.SelectArray(i => TranslateInitializerIndexerValue(i, indexVariables)))
 								.WithILInstruction(inst).WithRR(memberRR);
 							elementsStack.Peek().Add(Assignment(indexer, Translate(info.Values.Single(), typeHint: indexer.Type)));
 						} else {
@@ -2009,6 +2009,14 @@ namespace ICSharpCode.Decompiler.CSharp
 			return expr.WithILInstruction(block);
 		}
 
+		Expression TranslateInitializerIndexerValue(ILInstruction inst, Dictionary<ILVariable, ILInstruction> indexVariables)
+		{
+			if (inst is LdLoc ld && indexVariables.TryGetValue(ld.Variable, out var newInst)) {
+				inst = newInst;
+			}
+			return Translate(inst).Expression;
+		}
+
 		Expression MakeInitializerAssignment(IMember method, IL.Transforms.AccessPathElement member, List<Expression> values, Dictionary<ILVariable, ILInstruction> indexVariables)
 		{
 			Expression value;