Merge pull request #17101 from anntzer/wxclose

tacaswell · web-flow · commit 2227aa3912eb · 2020-04-13T17:19:54.000-04:00
MNT: Avoid "wrapped C/C++ object has been deleted" when closing wx window.
diff --git a/lib/matplotlib/backends/backend_wx.py b/lib/matplotlib/backends/backend_wx.py
@@ -1058,7 +1058,9 @@ def show(self):
     def destroy(self, *args):
         # docstring inherited
         _log.debug("%s - destroy()", type(self))
-        self.frame.Close()
+        frame = self.frame
+        if frame:  # Else, may have been already deleted, e.g. when closing.
+            frame.Close()
         wxapp = wx.GetApp()
         if wxapp:
             wxapp.Yield()
