From 60867888bae9439beee21e84036d0ad2dd3839e6 Mon Sep 17 00:00:00 2001
From: Xiaohong Bao <bao@lindenlab.com>
Date: Tue, 21 Jun 2011 16:57:24 -0600
Subject: fix for SH-369: [PUBLIC-JIRA-USERS] [crashhunters]
 LLVOAvatar::updateImpostors crash

---
 indra/llcharacter/llcharacter.cpp | 25 +++++++++++++++++++------
 indra/llcharacter/llcharacter.h   |  1 +
 indra/newview/llvoavatar.cpp      |  4 ++++
 3 files changed, 24 insertions(+), 6 deletions(-)

diff --git a/indra/llcharacter/llcharacter.cpp b/indra/llcharacter/llcharacter.cpp
index 5f84be2c5d..c9fb8534f1 100644
--- a/indra/llcharacter/llcharacter.cpp
+++ b/indra/llcharacter/llcharacter.cpp
@@ -38,7 +38,7 @@
 LLStringTable LLCharacter::sVisualParamNames(1024);
 
 std::vector< LLCharacter* > LLCharacter::sInstances;
-
+BOOL LLCharacter::sAllowInstancesChange = TRUE ;
 
 //-----------------------------------------------------------------------------
 // LLCharacter()
@@ -51,8 +51,10 @@ LLCharacter::LLCharacter()
 	mAppearanceSerialNum( 0 ),
 	mSkeletonSerialNum( 0 )
 {
-	mMotionController.setCharacter( this );
+	llassert_always(sAllowInstancesChange) ;
 	sInstances.push_back(this);
+
+	mMotionController.setCharacter( this );	
 	mPauseRequest = new LLPauseRequestHandle();
 }
 
@@ -62,18 +64,29 @@ LLCharacter::LLCharacter()
 // Class Destructor
 //-----------------------------------------------------------------------------
 LLCharacter::~LLCharacter()
-{
+{	
 	for (LLVisualParam *param = getFirstVisualParam(); 
 		param;
 		param = getNextVisualParam())
 	{
 		delete param;
 	}
-	std::vector<LLCharacter*>::iterator iter = std::find(sInstances.begin(), sInstances.end(), this);
-	if (iter != sInstances.end())
+
+	U32 i ;
+	U32 size = sInstances.size() ;
+	for(i = 0 ; i < size ; i++)
 	{
-		sInstances.erase(iter);
+		if(sInstances[i] == this)
+		{
+			break ;
+		}
 	}
+
+	llassert_always(i < size) ;
+
+	llassert_always(sAllowInstancesChange) ;
+	sInstances[i] = sInstances[size - 1] ;
+	sInstances.pop_back() ;
 }
 
 
diff --git a/indra/llcharacter/llcharacter.h b/indra/llcharacter/llcharacter.h
index a6347fcc3c..e81a27c2bc 100644
--- a/indra/llcharacter/llcharacter.h
+++ b/indra/llcharacter/llcharacter.h
@@ -266,6 +266,7 @@ public:
 	void			setSkeletonSerialNum( U32 num )	{ mSkeletonSerialNum = num; }
 
 	static std::vector< LLCharacter* > sInstances;
+	static BOOL sAllowInstancesChange ; //debug use
 
 protected:
 	LLMotionController	mMotionController;
diff --git a/indra/newview/llvoavatar.cpp b/indra/newview/llvoavatar.cpp
index 1b53348b43..8eda6346b0 100644
--- a/indra/newview/llvoavatar.cpp
+++ b/indra/newview/llvoavatar.cpp
@@ -8242,6 +8242,8 @@ U32 LLVOAvatar::getPartitionType() const
 //static
 void LLVOAvatar::updateImpostors() 
 {
+	LLCharacter::sAllowInstancesChange = FALSE ;
+
 	for (std::vector<LLCharacter*>::iterator iter = LLCharacter::sInstances.begin();
 		 iter != LLCharacter::sInstances.end(); ++iter)
 	{
@@ -8251,6 +8253,8 @@ void LLVOAvatar::updateImpostors()
 			gPipeline.generateImpostor(avatar);
 		}
 	}
+
+	LLCharacter::sAllowInstancesChange = TRUE ;
 }
 
 BOOL LLVOAvatar::isImpostor() const
-- 
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