Issue #11973: Fix a problem in kevent. The flags and fflags fields are now

properly handled as unsigned.

Misc/NEWS

@@ -66,6 +66,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #11973: Fix a problem in kevent. The flags and fflags fields are now
+  properly handled as unsigned.
+
 - Issue #17702: On error, os.environb now removes suppress the except context
   when raising a new KeyError with the original key.
 

Modules/selectmodule.c

@@ -1638,7 +1638,7 @@ kqueue_event_init(kqueue_event_Object *self, PyObject *args, PyObject *kwds)
     PyObject *pfd;
     static char *kwlist[] = {"ident", "filter", "flags", "fflags",
                              "data", "udata", NULL};
-    static char *fmt = "O|hhi" DATA_FMT_UNIT UINTPTRT_FMT_UNIT ":kevent";
+    static char *fmt = "O|hHI" DATA_FMT_UNIT UINTPTRT_FMT_UNIT ":kevent";
 
     EV_SET(&(self->e), 0, EVFILT_READ, EV_ADD, 0, 0, 0); /* defaults */