From 6efb8c3835b4d1234af962a58d26948d6d6004bb Mon Sep 17 00:00:00 2001
From: Thomas A Caswell <tcaswell@gmail.com>
Date: Mon, 13 Nov 2017 14:35:59 -0500
Subject: [PATCH] FIX: TextBox.disconnect remove from registries that TextBox
 has

closes #9436
---
 lib/matplotlib/widgets.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/matplotlib/widgets.py b/lib/matplotlib/widgets.py
index 81b8527f0243..8bf8cef52aad 100644
--- a/lib/matplotlib/widgets.py
+++ b/lib/matplotlib/widgets.py
@@ -928,10 +928,11 @@ def on_submit(self, func):
 
     def disconnect(self, cid):
         """remove the observer with connection id *cid*"""
-        try:
-            del self.observers[cid]
-        except KeyError:
-            pass
+        for reg in (self.change_observers, self.submit_observers):
+            try:
+                del reg[cid]
+            except KeyError:
+                pass
 
 
 class RadioButtons(AxesWidget):