From 9926b05e3e75fe7b5e864c06d539dd455a2d224d Mon Sep 17 00:00:00 2001
From: Samson <samsontmr@users.noreply.github.com>
Date: Tue, 10 Jan 2017 16:57:46 +0800
Subject: [PATCH] Raise exception if width or height is negative

---
 lib/matplotlib/axes/_base.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/matplotlib/axes/_base.py b/lib/matplotlib/axes/_base.py
index 3862828da8fb..61efde46ca93 100644
--- a/lib/matplotlib/axes/_base.py
+++ b/lib/matplotlib/axes/_base.py
@@ -483,6 +483,8 @@ def __init__(self, fig, rect,
             self._position = rect
         else:
             self._position = mtransforms.Bbox.from_bounds(*rect)
+        if self._position.width < 0 or self._position.height < 0:
+            raise ValueError('Width and height specified must be non-negative')
         self._originalPosition = self._position.frozen()
         # self.set_axes(self)
         self.axes = self