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-rw-r--r--Include/stringobject.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/Include/stringobject.h b/Include/stringobject.h
index 2b8cc2f..0a932f0 100644
--- a/Include/stringobject.h
+++ b/Include/stringobject.h
@@ -84,8 +84,8 @@ PyAPI_FUNC(void) _Py_ReleaseInternedStrings(void);
#define PyString_CHECK_INTERNED(op) (((PyStringObject *)(op))->ob_sstate)
/* Macro, trading safety for speed */
-#define PyString_AS_STRING(op) (((PyStringObject *)(op))->ob_sval)
-#define PyString_GET_SIZE(op) (((PyStringObject *)(op))->ob_size)
+#define PyString_AS_STRING(op) (assert(PyString_Check(op)),(((PyStringObject *)(op))->ob_sval))
+#define PyString_GET_SIZE(op) (assert(PyString_Check(op)),(((PyStringObject *)(op))->ob_size))
/* _PyString_Join(sep, x) is like sep.join(x). sep must be PyStringObject*,
x must be an iterable object. */