[3.14] gh-69004: Disable the IDLE Debugger menu item while user code runs (GH-157599) (#157603)

gh-69004: Disable the IDLE Debugger menu item while user code runs (GH-157599)

Like Stack Viewer since GH-17163, instead of a "Don't debug now" box.
(cherry picked from commit 2f04bda)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: 3 people

Lib/idlelib/idle_test/test_mainmenu.py

@@ -22,6 +22,7 @@ def test_tcl_indexes(self):
         # On failure, change pattern here and in function(s).
         # Patterns here have '.*' for re instead of '*' for tcl.
         for menu, pattern in (
+            ('debug', '.*ebugger'),  # PyShell.debug_menu_postcommand
             ('debug', '.*tack.*iewer'),  # PyShell.debug_menu_postcommand
             ('options', '.*ode.*ontext'),  # EW.__init__, CodeContext.toggle...
             ('options', '.*ine.*umbers'),  # EW.__init__, EW.toggle...event.

Lib/idlelib/pyshell.py

@@ -1099,6 +1099,7 @@ def open_debugger(self):
 
     def debug_menu_postcommand(self):
         state = 'disabled' if self.executing else 'normal'
+        self.update_menu_state('debug', '*ebugger', state)
         self.update_menu_state('debug', '*tack*iewer', state)
 
     def beginexecuting(self):

Misc/NEWS.d/next/IDLE/2026-09-15-23-27-38.gh-issue-69004.Z7Ym9G.rst

@@ -0,0 +1,2 @@
+The Debugger item of the IDLE Debug menu is now disabled while user code
+runs, like Stack Viewer.