commit 60586de02de074a33c015e5a013d85d0b17e7e61
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Thu Aug 02 00:52:22 2018 -0700
committer GitHub <noreply@github.com> Thu Aug 02 00:52:22 2018 -0700
tree 12582113f05ae99903eb1e9d07b6db8f694fcdd5
parent d9fc795487f74531ea43760469cc215858d0d908

bpo-34120: fix text viewer to call grab_release() only when needed (GH-8616)

(cherry picked from commit dd74369cb7b230b07ac3a031563406c8f2aae17f)

Co-authored-by: Tal Einat <taleinat+github@gmail.com>

Lib/idlelib/textview.py

diff --git a/Lib/idlelib/textview.py b/Lib/idlelib/textview.py
index e78e297..75b2470 100644
--- a/Lib/idlelib/textview.py
+++ b/Lib/idlelib/textview.py
@@ -83,7 +83,8 @@
                                             command=self.ok, takefocus=False)
         self.viewframe.pack(side='top', expand=True, fill='both')
 
-        if modal:
+        self.is_modal = modal
+        if self.is_modal:
             self.transient(parent)
             self.grab_set()
             if not _utest:
@@ -91,7 +92,8 @@
 
     def ok(self, event=None):
         """Dismiss text viewer dialog."""
-        self.grab_release()
+        if self.is_modal:
+            self.grab_release()
         self.destroy()