[Mono-bugs] [Bug 52853][Wis] New - using null with System.ValueType causes runtime crash

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Changed by atsushi@ximian.com.

http://bugzilla.ximian.com/show_bug.cgi?id=52853

--- shadow/52853	2004-01-14 12:24:43.000000000 -0500
+++ shadow/52853.tmp.14859	2004-01-14 12:24:43.000000000 -0500
@@ -0,0 +1,53 @@
+Bug#: 52853
+Product: Mono/Runtime
+Version: unspecified
+OS: 
+OS Details: XP, cygwin-1.5.5-1
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Wishlist
+Component: misc
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: atsushi@ximian.com               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: using null with System.ValueType causes runtime crash
+
+Basically null cannot be set to value types, but System.ValueType looks to 
+allow it under CLR.
+
+--------
+using System;
+
+class Test
+{
+        public static void Main ()
+        {
+                ValueType vt = null;
+        }
+}
+
+
+mono result:
+** ERROR **: Invalid IL code at IL0006 in .Test:Main (): IL_0006: stloc.0
+
+aborting...
+
+mint result:
+** ERROR **: file object.c: line 1861 (mono_value_box): assertion failed: 
+(class->valuetype)
+aborting...
+
+Expected Results:
+
+The above code runs without errors.
+
+How often does this happen? 
+
+Always (at least under cygwin).
+
+Additional Information:
+I tried both csc and mcs to generate this IL and both of them failed.