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-rw-r--r--stdio-common/vfprintf.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/stdio-common/vfprintf.c b/stdio-common/vfprintf.c
index ef9e62ffcc..d97476b13a 100644
--- a/stdio-common/vfprintf.c
+++ b/stdio-common/vfprintf.c
@@ -1499,8 +1499,7 @@ group_number (CHAR_T *w, CHAR_T *rear_ptr, const CHAR_T *grouping,
 
   /* Copy existing string so that nothing gets overwritten.  */
   src = (char *) alloca (rear_ptr - w);
-  memcpy (src, w + 1, rear_ptr - w);
-  s = &src[rear_ptr - w - 1];
+  s = (char *) __mempcpy (src, w + 1, rear_ptr - w) - 1;
   w = rear_ptr;
 
   /* Process all characters in the string.  */