From 74f0f0abe5cebf49d74161bd2e18715fc8045282 Mon Sep 17 00:00:00 2001
From: David Stansby <dstansby@gmail.com>
Date: Mon, 29 Apr 2019 11:51:27 +0100
Subject: [PATCH] Backport PR #14069: Don't try to use the colorbar formatter
 to format RGBA data.

---
 lib/matplotlib/image.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/matplotlib/image.py b/lib/matplotlib/image.py
index 9ce3c80edd3f..941234fe06bb 100644
--- a/lib/matplotlib/image.py
+++ b/lib/matplotlib/image.py
@@ -933,7 +933,7 @@ def get_cursor_data(self, event):
             return arr[i, j]
 
     def format_cursor_data(self, data):
-        if self.colorbar:
+        if np.ndim(data) == 0 and self.colorbar:
             return (
                 "["
                 + cbook.strip_math(