[Mono-bugs] [Bug 71669][Nor] New - NullPointerException when setting a value-type field to null through reflection

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Changed by serko84@hotmail.com.

http://bugzilla.ximian.com/show_bug.cgi?id=71669

--- shadow/71669	2005-01-24 10:23:32.000000000 -0500
+++ shadow/71669.tmp.13894	2005-01-24 10:23:32.000000000 -0500
@@ -0,0 +1,69 @@
+Bug#: 71669
+Product: Mono: Class Libraries
+Version: 1.0
+OS: Debian Woody
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: CORLIB
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: serko84@hotmail.com               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: NullPointerException when setting a value-type field to null through reflection
+
+Description of Problem:
+When setting a field of a value type to null using reflection, a NPE is
+thrown. On Microsoft .NET the value is set to its default.
+
+Steps to reproduce the problem:
+	class OneDecimal
+	{
+		public decimal d;
+	};
+
+	[Test]
+	public void Test()
+	{
+		OneDecimal od = new OneDecimal();
+		od.d = 10.0m;
+
+		FieldInfo fi = typeof(OneDecimal).GetField("d",
+			BindingFlags.Instance | BindingFlags.Public);
+
+		Assert.IsNotNull(fi);
+		fi.SetValue(od, null);
+
+		Assert.AreEqual(od.d, 0.0m);
+	}
+
+Actual Results:
+
+Unhandled Exception: System.NullReferenceException: Object reference not
+set to an instance of an object
+in (unmanaged) (wrapper managed-to-native)
+System.Reflection.MonoField:SetValueInternal
+(System.Reflection.FieldInfo,object,object)
+in <0x00004> (wrapper managed-to-native)
+System.Reflection.MonoField:SetValueInternal
+(System.Reflection.FieldInfo,object,object)
+in <0x000c9> System.Reflection.MonoField:SetValue
+(object,object,System.Reflection.BindingFlags,System.Reflection.Binder,System.Globalization.CultureInfo)
+in <0x00020> System.Reflection.FieldInfo:SetValue (object,object)
+in <0x0010c> X:Main ()
+
+(the last line is X:Main because I ran a slightly different version of the
+test as a stand-alone program)
+
+Expected Results:
+The test should pass
+
+How often does this happen? 
+When the field type is a value type.
+
+Additional Information:
+I'm using Mono 1.0.5 built from source on Debian testing.