FIX: fallback text renderer to fig._cachedRenderer, if none found

jklymak · jklymak · commit f584bff27b74 · 2018-09-04T12:31:15.000-07:00
diff --git a/lib/matplotlib/text.py b/lib/matplotlib/text.py
@@ -921,6 +921,8 @@ def get_window_extent(self, renderer=None, dpi=None):
 
         if renderer is not None:
             self._renderer = renderer
+        if self._renderer is None:
+            self._renderer = self.figure._cachedRenderer
         if self._renderer is None:
             raise RuntimeError('Cannot get window extent w/o renderer')
 
