4 files changed, 22 insertions, 8 deletions
diff --git a/indra/llwindow/llwindowmacosx-objc.h b/indra/llwindow/llwindowmacosx-objc.h
index 10bd3cbb91..99af161102 100644
--- a/indra/llwindow/llwindowmacosx-objc.h
+++ b/indra/llwindow/llwindowmacosx-objc.h
@@ -110,9 +110,9 @@ void glSwapBuffers(void* context);
 CGLContextObj getCGLContextObj(GLViewRef view);
 unsigned long getVramSize(GLViewRef view);
 float getDeviceUnitSize(GLViewRef view);
-const CGPoint getContentViewBoundsPosition(NSWindowRef window);
-const CGSize getContentViewBoundsSize(NSWindowRef window);
-const CGSize getDeviceContentViewSize(NSWindowRef window, GLViewRef view);
+CGPoint getContentViewBoundsPosition(NSWindowRef window);
+CGSize getContentViewBoundsSize(NSWindowRef window);
+CGSize getDeviceContentViewSize(NSWindowRef window, GLViewRef view);
 void getWindowSize(NSWindowRef window, float* size);
 void setWindowSize(NSWindowRef window, int width, int height);
 void getCursorPos(NSWindowRef window, float* pos);
diff --git a/indra/llwindow/llwindowmacosx-objc.mm b/indra/llwindow/llwindowmacosx-objc.mm
index 8fece7c5c7..f895c17643 100644
--- a/indra/llwindow/llwindowmacosx-objc.mm
+++ b/indra/llwindow/llwindowmacosx-objc.mm
@@ -258,17 +258,17 @@ float getDeviceUnitSize(GLViewRef view)
 	return [(LLOpenGLView*)view convertSizeToBacking:NSMakeSize(1, 1)].width;
 }
 
-const CGPoint getContentViewBoundsPosition(NSWindowRef window)
+CGPoint getContentViewBoundsPosition(NSWindowRef window)
 {
 	return [[(LLNSWindow*)window contentView] bounds].origin;
 }
 
-const CGSize getContentViewBoundsSize(NSWindowRef window)
+CGSize getContentViewBoundsSize(NSWindowRef window)
 {
 	return [[(LLNSWindow*)window contentView] bounds].size;
 }
 
-const CGSize getDeviceContentViewSize(NSWindowRef window, GLViewRef view)
+CGSize getDeviceContentViewSize(NSWindowRef window, GLViewRef view)
 {
     return [(NSOpenGLView*)view convertRectToBacking:[[(LLNSWindow*)window contentView] bounds]].size;
 }
diff --git a/indra/llwindow/llwindowmacosx.cpp b/indra/llwindow/llwindowmacosx.cpp
index 6dec131a34..3554f90be8 100644
--- a/indra/llwindow/llwindowmacosx.cpp
+++ b/indra/llwindow/llwindowmacosx.cpp
@@ -382,7 +382,10 @@ void callWindowFocus()
 
 void callWindowUnfocus()
 {
-	gWindowImplementation->getCallbacks()->handleFocusLost(gWindowImplementation);
+	if ( gWindowImplementation && gWindowImplementation->getCallbacks() )
+	{
+		gWindowImplementation->getCallbacks()->handleFocusLost(gWindowImplementation);
+	}
 }
 
 void callWindowHide()
diff --git a/indra/llwindow/llwindowwin32.cpp b/indra/llwindow/llwindowwin32.cpp
index 985bd79d13..e05f507506 100644
--- a/indra/llwindow/llwindowwin32.cpp
+++ b/indra/llwindow/llwindowwin32.cpp
@@ -741,6 +741,17 @@ void LLWindowWin32::restore()
 	SetFocus(mWindowHandle);
 }
 
+bool destroy_window_handler(HWND &hWnd)
+{
+    __try
+    {
+        return DestroyWindow(hWnd);
+    }
+    __except (EXCEPTION_EXECUTE_HANDLER)
+    {
+        return false;
+    }
+}
 
 // close() destroys all OS-specific code associated with a window.
 // Usually called from LLWindowManager::destroyWindow()
@@ -814,7 +825,7 @@ void LLWindowWin32::close()
 	ShowWindow(mWindowHandle, SW_HIDE);
 
 	// This causes WM_DESTROY to be sent *immediately*
-	if (!DestroyWindow(mWindowHandle))
+	if (!destroy_window_handler(mWindowHandle))
 	{
 		OSMessageBox(mCallbacks->translateString("MBDestroyWinFailed"),
 			mCallbacks->translateString("MBShutdownErr"),