Issue #18711: Add a new `PyErr_FormatV` function, similar to `PyErr_Format` but accepting a `va_list` argument.
diff --git a/PC/python35stub.def b/PC/python35stub.def
index 8736ffb..6501da0 100644
--- a/PC/python35stub.def
+++ b/PC/python35stub.def
@@ -119,6 +119,7 @@
 PyErr_ExceptionMatches
 PyErr_Fetch
 PyErr_Format
+PyErr_FormatV
 PyErr_GivenExceptionMatches
 PyErr_NewException
 PyErr_NewExceptionWithDoc