Use local _n to avoid multiple evaluation

1 files changed, 2 insertions, 2 deletions

diff --git a/include/stdio.h b/include/stdio.h
index 237ccb0..fe0d5a8 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -24,9 +24,9 @@ int __fortify_vsnprintf(char *__restrict s, size_t n, const char *__restrict fmt
 #define snprintf(s, n, fmt, ...) ({ \
         size_t _n = (n); \
         size_t bos = __builtin_object_size(s, 0); \
-        if (n > bos) \
+        if (_n > bos) \
                 __builtin_trap(); \
-        snprintf(s, n, fmt, __VA_ARGS__); \
+        snprintf(s, _n, fmt, __VA_ARGS__); \
 })
 
 #endif