[#LIBOMV-367] client.Objects.OnObjectUpdated Bug - Open Metaverse JIRA issue tracker

libopenmetaverse

client.Objects.OnObjectUpdated Bug

Created: 28/Aug/08 07:52 PM Updated: 05/Sep/08 08:50 PM

Component/s:

None

Affects Version/s:

None

Fix Version/s:

0.6.0

Issue Links:

Blocks

This issue is blocked by:

~~LIBOMV-368~~ ObjectManager.ObjectPropertiesCallback(Objects_OnObjectProperties) is not raised and Async Packet Event Handler: System.NullRef erenceException in testclient

~~LIBOMV-369~~ [patch] new Primitive equality operators do not check for null refs first

Environment:	.NET / Windows32
Steps to Reproduce:	« Hide use client.Objects.OnObjectUpdated += new ObjectManager.ObjectUpdatedCallback(Objects_OnObjectUpdated); And Login to an enviornment with active physical objects or moving avatars. Show » use client.Objects.OnObjectUpdated += new ObjectManager.ObjectUpdatedCallback(Objects_OnObjectUpdated); And Login to an enviornment with active physical objects or moving avatars.

Description

« Hide

Object reference not set to an instance of
an object.
System.NullReferenceException: Object reference not set to an instance of an obj
ect.
at OpenMetaverse.Primitive.op_Equality(Primitive lhs, Primitive rhs) in D:\LI
BSL\OpenMetaverse\Primitives\Primitive.cs:line 1271
at DebugClient.ServerAPP.Objects_OnObjectUpdated(Simulator simulator, ObjectU
pdate update, UInt64 regionHandle, UInt16 timeDilation) in D:\LIBSL\DebugClient\
SeAPP.cs:line 719
at OpenMetaverse.ObjectManager.FireOnObjectUpdated(Simulator simulator, Objec
tUpdate update, UInt64 RegionHandle, UInt16 TimeDilation) in D:\LIBSL\OpenMetave
rse\ObjectManager.cs:line 2355

Error encountered whenever an object update is received. (Objects_OnObjectUpdated functions don't seem to work)

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Dirty McLean added a comment - 28/Aug/08 08:13 PM

Code context would be helpful. Even if this issue is resolved so that it prints the exception in console instead of crashing, I believe you might be doing a comparison on a null object which is the real source of your troubles. I could be mistaken, but without seeing the code, it is hard to say.

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Blue Backbite added a comment - 28/Aug/08 08:20 PM - edited

Contents of my Objects_OnObjectUpdated

private static void Objects_OnObjectUpdated(Simulator simulator, ObjectUpdate update, ulong regionHandle, ushort timeDilation) //Callback for object updates in simulator
{
if (!update.Avatar) { return; }//Exit this event if it's not an avatar update
Avatar av;//Objects.TryGetAvatar(update.LocalID, out av);
client.Network.CurrentSim.ObjectsAvatars.TryGetValue(update.LocalID, out av);
string GroupIDS = av.GroupName;
if (av == null) return;

if (follow != null)
{
if (av.Name == follow)
{
if (Vector3.Distance(av.Position, client.Self.SimPosition) > 3)

{ Vector3 post = av.Position; client.Self.AutoPilotLocal(Convert.ToInt32(post.X), Convert.ToInt32(post.Y), post.Z); }

else

{ client.Self.AutoPilotCancel(); }

}
}
}

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Jim Radford added a comment - 03/Sep/08 02:13 PM

I believe this patch is intended to correct this bad behaviour