X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/4cf018e14ea61679b99874765f232b2032b3d3f8..e3b2f973e8278b4509710a5a06bede1297b317eb:/src/ribbon/toolbar.cpp

diff --git a/src/ribbon/toolbar.cpp b/src/ribbon/toolbar.cpp
index 9e8839bc92..cd4817e0a2 100644
--- a/src/ribbon/toolbar.cpp
+++ b/src/ribbon/toolbar.cpp
@@ -596,7 +596,7 @@ void wxRibbonToolBar::OnMouseMove(wxMouseEvent& evt)
                 what = wxRIBBON_TOOLBAR_TOOL_DROPDOWN_HOVERED;
 
             new_hover->state |= what;
-            
+
             if(new_hover == m_active_tool)
             {
                 new_hover->state &= ~wxRIBBON_TOOLBAR_TOOL_ACTIVE_MASK;
@@ -661,9 +661,15 @@ void wxRibbonToolBar::OnMouseUp(wxMouseEvent& WXUNUSED(evt))
             notification.SetBar(this);
             ProcessEvent(notification);
         }
-        m_active_tool->state &= ~wxRIBBON_TOOLBAR_TOOL_ACTIVE_MASK;
-        m_active_tool = NULL;
-        Refresh(false);
+
+        // Notice that m_active_tool could have been reset by the event handler
+        // above so we need to test it again.
+        if (m_active_tool)
+        {
+            m_active_tool->state &= ~wxRIBBON_TOOLBAR_TOOL_ACTIVE_MASK;
+            m_active_tool = NULL;
+            Refresh(false);
+        }
     }
 }