Fix tight bounding box calculation in axes-free figure

mdboom · mdboom · commit ab2b1fc5a69d · 2014-11-17T13:49:42.000-05:00
diff --git a/lib/matplotlib/figure.py b/lib/matplotlib/figure.py
@@ -1610,6 +1610,9 @@ def get_tightbbox(self, renderer):
             if ax.get_visible():
                 bb.append(ax.get_tightbbox(renderer))
 
+        if len(bb) == 0:
+            return self.bbox_inches
+
         _bbox = Bbox.union([b for b in bb if b.width != 0 or b.height != 0])
 
         bbox_inches = TransformedBbox(_bbox,
