From 0169babb4911f09c267d67801cc17f2c5b356022 Mon Sep 17 00:00:00 2001
From: Marek Safar <marek.safar@gmail.com>
Date: Mon, 24 Jan 2011 13:47:28 +0000
Subject: [PATCH] Guard against invalid predefined assembly attributes

---
 mcs/mcs/import.cs | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/mcs/mcs/import.cs b/mcs/mcs/import.cs
index 2be579ccdec..e3ada6de4f2 100644
--- a/mcs/mcs/import.cs
+++ b/mcs/mcs/import.cs
@@ -1563,8 +1563,12 @@ namespace Mono.CSharp
 				importer.GetCustomAttributeTypeName (a, out ns, out name);
 
 				if (name == "CLSCompliantAttribute") {
-					if (ns == "System")
-						cls_compliant = (bool) a.ConstructorArguments[0].Value;
+					if (ns == "System") {
+						try {
+							cls_compliant = (bool) a.ConstructorArguments[0].Value;
+						} catch {
+						}
+					}
 					continue;
 				}
 
@@ -1572,7 +1576,13 @@ namespace Mono.CSharp
 					if (ns != MetadataImporter.CompilerServicesNamespace)
 						continue;
 
-					string s = a.ConstructorArguments[0].Value as string;
+					string s;
+					try {
+						s = a.ConstructorArguments[0].Value as string;
+					} catch {
+						s = null;
+					}
+
 					if (s == null)
 						continue;
 
-- 
2.25.1