Backport PR #12012: FIX: fallback text renderer to fig._cachedRenderer, if none found

tacaswell · MeeseeksDev[bot] · commit 4ca4a21ea3f3 · 2018-09-10T19:33:38.000Z
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')
 
