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-rw-r--r--Python/getargs.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/Python/getargs.c b/Python/getargs.c
index aa4a228..00f298a 100644
--- a/Python/getargs.c
+++ b/Python/getargs.c
@@ -84,6 +84,8 @@ vgetargs1(PyObject *args, char *format, va_list *p_va, int compat)
int i, len;
char *msg;
+ assert(compat || (args != (PyObject*)NULL));
+
for (;;) {
int c = *format++;
if (c == '(' /* ')' */) {