move suppression of KeyboardInterrupt (#82)

launch/launch/launch_service.py

@@ -337,6 +337,8 @@ def _on_sigquit(signum, frame):
             while not run_loop_task.done():
                 try:
                     self.__loop_from_run_thread.run_until_complete(run_loop_task)
+                except KeyboardInterrupt:
+                    pass
                 except asyncio.CancelledError:
                     _logger.error('asyncio run loop was canceled')
         finally:

launch/launch/utilities/signal_management.py

@@ -101,9 +101,6 @@ def install_signal_handlers():
     If you register signal handlers before calling this function, then your
     signal handler will automatically be called by the signal handlers in this
     thread.
-    If your handler for SIGINT raises KeyboardInterrupt, and a custom handler
-    for SIGINT has been set with on_sigint, then that exception will be
-    suppressed.
     """
     global __signal_handlers_installed_lock, __signal_handlers_installed
     with __signal_handlers_installed_lock:
@@ -120,12 +117,7 @@ def __on_sigint(signum, frame):
         if callable(__custom_sigint_handler):
             __custom_sigint_handler(signum, frame)
         if callable(__original_sigint_handler):
-            try:
-                __original_sigint_handler(signum, frame)
-            except KeyboardInterrupt:
-                if __custom_sigint_handler is None:
-                    # Suppress KeyboardInterrupt unless there is no custom handler.
-                    raise
+            __original_sigint_handler(signum, frame)
 
     if platform.system() != 'Windows':
         # Windows does not support SIGQUIT