IPython console: Prevent segfault when closing and a client is debugging

spyder/plugins/ipythonconsole/widgets/client.py

@@ -23,7 +23,7 @@
 
 # Third party imports (qtpy)
 from qtpy.QtCore import QUrl, QTimer, Signal, Slot
-from qtpy.QtWidgets import QVBoxLayout, QWidget
+from qtpy.QtWidgets import QApplication, QVBoxLayout, QWidget
 
 # Local imports
 from spyder.api.translations import _
@@ -121,7 +121,11 @@ def __init__(self, parent, id_,
         self.allow_rename = True
         self.error_text = None
         self.give_focus = give_focus
+
+        # Attrs used when closing
         self.__is_last_client = False
+        self.__debugging_on_close = False
+        self.__close_now = False
 
         css_path = self.get_conf('css_path', section='appearance')
         if css_path is None:
@@ -554,10 +558,11 @@ def set_color_scheme(self, color_scheme, reset=True):
         except AttributeError:
             pass
 
-    def close_client(self, is_last_client):
+    def close_client(self, is_last_client, now=False):
         """Close the client."""
         self.__is_last_client = is_last_client
-        debugging = False
+        self.__close_now = now
+        self.__debugging_on_close = False
 
         # Needed to handle a RuntimeError. See spyder-ide/spyder#5568.
         try:
@@ -566,15 +571,15 @@ def close_client(self, is_last_client):
             # debugging mode before closing, but also when a kernel restart is
             # requested while debugging.
             if self.shellwidget.is_debugging():
-                debugging = True
+                self.__debugging_on_close = True
                 self.shellwidget.sig_prompt_ready.connect(self.finish_close)
                 self.shellwidget.stop_debugging()
             else:
                 self.interrupt_kernel()
         except RuntimeError:
             pass
 
-        if not debugging:
+        if not self.__debugging_on_close:
             self.finish_close()
 
     def finish_close(self):
@@ -587,6 +592,14 @@ def finish_close(self):
         except (RuntimeError, TypeError):
             pass
 
+        # This is a hack to prevent segfaults when closing Spyder and the
+        # client was debugging before doing it.
+        # It's a side effect of spyder-ide/spyder#21788
+        if self.__debugging_on_close and self.__close_now:
+            for __ in range(3):
+                time.sleep(0.08)
+                QApplication.processEvents()
+
         self.shutdown(self.__is_last_client)
 
         # Prevent errors in our tests

spyder/plugins/ipythonconsole/widgets/main_widget.py

@@ -1767,8 +1767,9 @@ def close_all_clients(self):
         open_clients = self.clients.copy()
         for client in self.clients:
             is_last_client = (
-                len(self.get_related_clients(client, open_clients)) == 0)
-            client.close_client(is_last_client)
+                len(self.get_related_clients(client, open_clients)) == 0
+            )
+            client.close_client(is_last_client, now=True)
             open_clients.remove(client)
 
         # Wait for all KernelHandler threads to shutdown.