From 0dfef7b3453a1599806b8be04cf42f9b67c2e592 Mon Sep 17 00:00:00 2001
From: Marek Safar <marek.safar@gmail.com>
Date: Fri, 16 Sep 2016 13:12:34 +0200
Subject: [PATCH] [mcs] Delay array base type interfaces initialization. Fixes
 #44402

---
 mcs/mcs/typespec.cs | 30 ++++++++++++++++++++++++++----
 1 file changed, 26 insertions(+), 4 deletions(-)

diff --git a/mcs/mcs/typespec.cs b/mcs/mcs/typespec.cs
index fb02370d..696bde5 100644
--- a/mcs/mcs/typespec.cs
+++ b/mcs/mcs/typespec.cs
@@ -109,7 +109,6 @@ public TypeSpec (MemberKind kind, TypeSpec declaringType, ITypeDefinition defini
 					var imported = MemberDefinition as ImportedTypeDefinition;
 					if (imported != null && Kind != MemberKind.MissingType)
 						imported.DefineInterfaces (this);
-
 				}
 
 				return ifaces;
@@ -1603,6 +1602,12 @@ protected ElementTypeSpec (MemberKind kind, TypeSpec element, MetaType info)
 
 		public TypeSpec Element { get; private set; }
 
+		public override IList<TypeSpec> Interfaces {
+			set {
+				throw new NotSupportedException ();
+			}
+		}
+
 		bool ITypeDefinition.IsComImport {
 			get {
 				return false;
@@ -1777,13 +1782,19 @@ public bool Equals (TypeRankPair other)
 		readonly int rank;
 		readonly ModuleContainer module;
 
-		private ArrayContainer (ModuleContainer module, TypeSpec element, int rank)
+		ArrayContainer (ModuleContainer module, TypeSpec element, int rank)
 			: base (MemberKind.ArrayType, element, null)
 		{
 			this.module = module;
 			this.rank = rank;
 		}
 
+		public override IList<TypeSpec> Interfaces {
+			get {
+				return BaseType.Interfaces;
+			}
+		}
+
 		public int Rank {
 			get {
 				return rank;
@@ -1926,7 +1937,6 @@ public static ArrayContainer MakeType (ModuleContainer module, TypeSpec element,
 			if (!module.ArrayTypesCache.TryGetValue (key, out ac)) {
 				ac = new ArrayContainer (module, element, rank);
 				ac.BaseType = module.Compiler.BuiltinTypes.Array;
-				ac.Interfaces = ac.BaseType.Interfaces;
 
 				module.ArrayTypesCache.Add (key, ac);
 			}
@@ -1942,11 +1952,17 @@ public override List<MissingTypeSpecReference> ResolveMissingDependencies (Membe
 
 	class ReferenceContainer : ElementTypeSpec
 	{
-		private ReferenceContainer (TypeSpec element)
+		ReferenceContainer (TypeSpec element)
 			: base (MemberKind.Class, element, null)	// TODO: Kind.Class is most likely wrong
 		{
 		}
 
+		public override IList<TypeSpec> Interfaces {
+			get {
+				return null;
+			}
+		}
+
 		public override MetaType GetMetaInfo ()
 		{
 			if (info == null) {
@@ -1977,6 +1993,12 @@ private PointerContainer (TypeSpec element)
 			state &= ~StateFlags.CLSCompliant_Undetected;
 		}
 
+		public override IList<TypeSpec> Interfaces {
+			get {
+				return null;
+			}
+		}
+
 		public override MetaType GetMetaInfo ()
 		{
 			if (info == null) {