[Mono-bugs] [Bug 77275][Blo] New - Strange NullReferenceException on 'this' reference

bugzilla-daemon at bugzilla.ximian.com bugzilla-daemon at bugzilla.ximian.com
Mon Jan 16 08:47:06 EST 2006

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Changed by rodrigobamboo at gmail.com.


--- shadow/77275	2006-01-16 08:47:06.000000000 -0500
+++ shadow/77275.tmp.9885	2006-01-16 08:47:06.000000000 -0500
@@ -0,0 +1,59 @@
+Bug#: 77275
+Product: Mono: Runtime
+Version: 1.1
+OS Details: Linux bambuntu 2.6.10-6-k7 #1 Thu Dec 22 11:33:26 UTC 2005 i686 GNU/Linux
+Status: NEW   
+Priority: Blocker
+Component: JIT
+AssignedTo: lupus at ximian.com                            
+ReportedBy: rodrigobamboo at gmail.com               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+Summary: Strange NullReferenceException on 'this' reference
+Unfortunately after several tries I was not able to create a small test
+case to reproduce the problem so I'm sending the full db4o sources along
+with a small console program that shows the problem.
+The code runs ok on ms.net 1.1, ms.net 2.0 and ms.cf 1.0 but fails on mono.
+Debugging shows that for some reason the 'this' pointer on the exception
+site seems to be NULL.
+This is a really show stopper for us for it does not allow our native query
+optimizer to run on mono.
+Thanks in advance for any help!
+Steps to reproduce the problem
+unzip StrangeNREBug.zip && cd db4o-spikes && make
+Actual Results
+1._name == Homer
+FAILURE: System.NullReferenceException: Object reference not set to an
+instance of an object
+Expected Results
+1._name == Homer
+How often does this happen? 
+Additional Information
+rodrigob at bambuntu:~$ mono --version
+Mono JIT compiler version 1.1.13, (C) 2002-2005 Novell, Inc and
+Contributors. www.mono-project.com
+        TLS:           __thread
+        GC:            Included Boehm (with typed GC)
+        SIGSEGV      : normal

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