added LLProgressView::abortShowProgress. Issue upon failed login to terminate pending loginpanel destruction which was killing the actual 'new' replacement loginpanel instead of the old to-be-deleted version.

indra/newview/llpanellogin.cpp

@@ -216,15 +216,8 @@ LLPanelLogin::LLPanelLogin(const LLRect &rect,
 	setBackgroundVisible(FALSE);
 	setBackgroundOpaque(TRUE);
 
-	// instance management
-	if (LLPanelLogin::sInstance)
-	{
-		LL_WARNS("AppInit") << "Duplicate instance of login view deleted" << LL_ENDL;
-		// Don't leave bad pointer in gFocusMgr
-		gFocusMgr.setDefaultKeyboardFocus(NULL);
-
-		delete LLPanelLogin::sInstance;
-	}
+	gViewerWindow->abortShowProgress();	//Kill previous instance. It might still be alive, and if so, its probably pending
+										//deletion via the progressviews idle callback. Kill it now and unregister said idle callback.
 
 	LLPanelLogin::sInstance = this;
 

indra/newview/llprogressview.cpp

@@ -134,6 +134,14 @@ void LLProgressView::revealIntroPanel()
 	mFadeFromLoginTimer.start();
 	gIdleCallbacks.addFunction(onIdle, this);
 }
+
+void LLProgressView::abortShowProgress()
+{
+	mFadeFromLoginTimer.stop();
+	LLPanelLogin::close();
+	gIdleCallbacks.deleteFunction(onIdle, this);
+}
+
 void LLProgressView::setStartupComplete()
 {
 	mStartupComplete = true;

indra/newview/llprogressview.h

@@ -62,6 +62,7 @@ public:
 	void setMessage(const std::string& msg);
 	
 	void revealIntroPanel();
+	void abortShowProgress();
 
 	void setStartupComplete();
 

indra/newview/llviewerwindow.cpp

@@ -5154,6 +5154,14 @@ void LLViewerWindow::revealIntroPanel()
 	}
 }
 
+void LLViewerWindow::abortShowProgress()
+{
+	if (mProgressView)
+	{
+		mProgressView->abortShowProgress();
+	}
+}
+
 void LLViewerWindow::setShowProgress(const BOOL show)
 {
 	if (mProgressView)

indra/newview/llviewerwindow.h

@@ -280,6 +280,7 @@ public:
 	void			setProgressCancelButtonVisible( BOOL b, const std::string& label = LLStringUtil::null );
 	LLProgressView *getProgressView() const;
 	void			revealIntroPanel();
+	void			abortShowProgress();
 	void			setStartupComplete();
 
 	void			updateObjectUnderCursor();