Disable completion when PDB is active in Python Shell buffer

* lisp/progmodes/python.el (python-shell-completion-at-point): Disable
completion in Python buffer when PDB is active in Python Shell buffer.
* test/lisp/progmodes/python-tests.el (python-shell-completion-pdb-1):
New test (bug#58562).

1 files changed, 4 insertions, 1 deletions

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index 0de76b0bde3..50f1e6752e4 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -4102,7 +4102,10 @@ using that one instead of current buffer's process."
           (with-current-buffer (process-buffer process)
             (cond ((or (null prompt)
                        (and is-shell-buffer
-                            (< (point) (cdr prompt-boundaries))))
+                            (< (point) (cdr prompt-boundaries)))
+                       (and (not is-shell-buffer)
+                            (string-match-p
+                             python-shell-prompt-pdb-regexp prompt)))
                    #'ignore)
                   ((or (not python-shell-completion-native-enable)
                        ;; Even if native completion is enabled, for