Issue #23055: Fixed read-past-the-end error in PyUnicode_FromFormatV.

aed19842 · Serhiy Storchaka · 3f95292b · aed19842
Commit aed19842 authored Jan 31, 2015 by Serhiy Storchaka
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Objects/unicodeobject.c Objects/unicodeobject.c +2 -0

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--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -762,6 +762,8 @@ PyUnicode_FromFormatV(const char *format, va_list vargs)
             f++;
             while (*f && *f != '%' && !Py_ISALPHA((unsigned)*f))
                 f++;
+             if (!*f)
+                 break;
             if (*f == 's' || *f=='S' || *f=='R' || *f=='A' || *f=='V')
                 ++callcount;
         }