Source: matplotlib
Version: 3.5.0-2
Severity: normal
Tags: patch fixed-upstream
Control: forwarded -1 https://github.com/matplotlib/matplotlib/issues/21683

Hi,

I am in the process of updateting sagemath and have problems building the 
documentation because of this bug. Please apply this upstream patch for the 
next upload, it should also be fixed in matplotlib 3.5.1.

Best,
Tobias
Bug: https://github.com/matplotlib/matplotlib/issues/21683
Source: https://github.com/matplotlib/matplotlib/pull/21686

>From 34636bfe2b9fa9dfa0eb6db6dc662c9b57fe79d6 Mon Sep 17 00:00:00 2001
From: Jody Klymak <jkly...@gmail.com>
Date: Sat, 20 Nov 2021 08:28:56 +0100
Subject: [PATCH 1/2] FIX: don't double transpose xy for add-lines colorbar

---
 lib/matplotlib/colorbar.py | 2 --
 1 file changed, 2 deletions(-)

--- a/lib/matplotlib/colorbar.py
+++ b/lib/matplotlib/colorbar.py
@@ -783,8 +783,6 @@
         xy[[2, 3], 1] += fac
         # back to axes units...
         xy = self.ax.transAxes.inverted().transform(inches.transform(xy))
-        if self.orientation == 'horizontal':
-            xy = xy.T
         col.set_clip_path(mpath.Path(xy, closed=True),
                           self.ax.transAxes)
         self.ax.add_collection(col)

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