Suppress side-effects of signal propagation

uvicorn/_subprocess.py

@@ -75,5 +75,10 @@ def subprocess_started(
     # Logging needs to be setup again for each child.
     config.configure_logging()
 
-    # Now we can call into `Server.run(sockets=sockets)`
-    target(sockets=sockets)
+    try:
+        # Now we can call into `Server.run(sockets=sockets)`
+        target(sockets=sockets)
+    except KeyboardInterrupt:  # pragma: no cover
+        # supress the exception to avoid a traceback from subprocess.Popen
+        # the parent already expects us to end, so no vital information is lost
+        pass

uvicorn/main.py

@@ -566,16 +566,18 @@ def run(
         logger.warning("You must pass the application as an import string to enable 'reload' or " "'workers'.")
         sys.exit(1)
 
-    if config.should_reload:
-        sock = config.bind_socket()
-        ChangeReload(config, target=server.run, sockets=[sock]).run()
-    elif config.workers > 1:
-        sock = config.bind_socket()
-        Multiprocess(config, target=server.run, sockets=[sock]).run()
-    else:
-        server.run()
-    if config.uds and os.path.exists(config.uds):
-        os.remove(config.uds)  # pragma: py-win32
+    try:
+        if config.should_reload:
+            sock = config.bind_socket()
+            ChangeReload(config, target=server.run, sockets=[sock]).run()
+        elif config.workers > 1:
+            sock = config.bind_socket()
+            Multiprocess(config, target=server.run, sockets=[sock]).run()
+        else:
+            server.run()
+    finally:
+        if config.uds and os.path.exists(config.uds):
+            os.remove(config.uds)  # pragma: py-win32
 
     if not server.started and not config.should_reload and config.workers == 1:
         sys.exit(STARTUP_FAILURE)