Original SIGINT handler is restored upon exit

aiosched/kernel.py

@@ -374,7 +374,8 @@ class FIFOKernel:
         """
         Starts the event loop from a synchronous context
         """
-
+        
+        old = signal.getsignal(signal.SIGINT)
         signal.signal(signal.SIGINT, self._sigint_handler)
         self.entry_point = Task(func.__name__ or str(func), func(*args, **kwargs))
         self.run_ready.append(self.entry_point)
@@ -383,6 +384,7 @@ class FIFOKernel:
             self.run()
         finally:
             self.debugger.on_exit()
+            signal.signal(signal.SIGINT, old)
         if (
             self.entry_point.exc
             and self.entry_point.context is None