[Mono-bugs] [Bug 82848][Nor] New - GCHandle.AddrOfPinnedObject() exception instead of returning a value.

bugzilla-daemon at bugzilla.ximian.com bugzilla-daemon at bugzilla.ximian.com
Fri Sep 14 05:00:22 EDT 2007

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Changed by dragon at pksoft.hu.


--- shadow/82848	2007-09-14 05:00:22.000000000 -0400
+++ shadow/82848.tmp.2136	2007-09-14 05:00:22.000000000 -0400
@@ -0,0 +1,53 @@
+Bug#: 82848
+Product: Mono: Class Libraries
+Version: 1.2
+OS Details: 
+Status: NEW   
+Priority: Normal
+Component: CORLIB
+AssignedTo: mono-bugs at ximian.com                            
+ReportedBy: dragon at pksoft.hu               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+Summary: GCHandle.AddrOfPinnedObject() exception instead of returning a value.
+Description of Problem:
+GCHandle.AddrOfPinnedObject() throws exception if it has been allocated for
+an object with a value of null.
+Steps to reproduce the problem:
+Use the following code:
+object nullObj = null;
+GCHandle handle = GCHandle.Alloc(nullObj, GCHandleType.Pinned);
+  IntPtr ptr = handle.AddrOfPinnedObject();
+  Console.WriteLine(ptr);
+  handle.Free();
+Actual Results:
+Unhandled Exception: System.InvalidOperationException: The handle is not of
+Pinned type
+  at System.Runtime.InteropServices.GCHandle.AddrOfPinnedObject () [0x00000]
+Expected Results:
+The variable gets a value of zero. "0" gets printed onto screen.
+How often does this happen? 
+Additional Information:
+Happens with Mono 1.2.5. Shows expected results on MS .Net 2.0.
+Untested under Linux.

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