From f9033582b75c82d1109063b5ffbf0b0c14f1e0a1 Mon Sep 17 00:00:00 2001
From: Marek Safar <marek.safar@gmail.com>
Date: Tue, 4 Jan 2011 22:31:34 +0000
Subject: [PATCH] Set build-in types modifiers

---
 mcs/errors/cs0030-11.cs | 15 +++++++++++++++
 mcs/mcs/import.cs       |  2 +-
 mcs/mcs/typespec.cs     |  7 +++----
 3 files changed, 19 insertions(+), 5 deletions(-)
 create mode 100644 mcs/errors/cs0030-11.cs

diff --git a/mcs/errors/cs0030-11.cs b/mcs/errors/cs0030-11.cs
new file mode 100644
index 00000000000..4a8d1fd5527
--- /dev/null
+++ b/mcs/errors/cs0030-11.cs
@@ -0,0 +1,15 @@
+// CS0030: Cannot convert type `string' to `IA'
+// Line: 13
+
+interface IA
+{
+}
+
+class MainClass
+{
+	public static void Main ()
+	{
+		string s = "s";
+		IA i = (IA) s;
+	}
+}
diff --git a/mcs/mcs/import.cs b/mcs/mcs/import.cs
index 33c87732d8a..23835c98b1a 100644
--- a/mcs/mcs/import.cs
+++ b/mcs/mcs/import.cs
@@ -790,7 +790,7 @@ namespace Mono.CSharp
 
 			} else if (buildin_types.TryGetValue (type, out pt)) {
 				spec = pt;
-				pt.SetDefinition (definition, type);
+				pt.SetDefinition (definition, type, mod);
 			}
 
 			if (spec == null)
diff --git a/mcs/mcs/typespec.cs b/mcs/mcs/typespec.cs
index 67fc8b825bf..33cc5b5e737 100644
--- a/mcs/mcs/typespec.cs
+++ b/mcs/mcs/typespec.cs
@@ -497,9 +497,6 @@ namespace Mono.CSharp
 		public BuildinTypeSpec (MemberKind kind, string ns, string name, Type buildinKind)
 			: base (kind, null, null, null, Modifiers.PUBLIC)
 		{
-			if (kind == MemberKind.Struct)
-				modifiers |= Modifiers.SEALED;
-
 			this.type = buildinKind;
 			this.ns = ns;
 			this.name = name;
@@ -573,10 +570,11 @@ namespace Mono.CSharp
 			return FullName;
 		}
 
-		public void SetDefinition (ITypeDefinition td, MetaType type)
+		public void SetDefinition (ITypeDefinition td, MetaType type, Modifiers mod)
 		{
 			this.definition = td;
 			this.info = type;
+			this.modifiers |= (mod & ~Modifiers.AccessibilityMask);
 		}
 
 		public void SetDefinition (TypeSpec ts)
@@ -585,6 +583,7 @@ namespace Mono.CSharp
 			this.info = ts.GetMetaInfo ();
 			this.BaseType = ts.BaseType;
 			this.Interfaces = ts.Interfaces;
+			this.modifiers = ts.Modifiers;
 		}
 	}
 
-- 
2.25.1