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-rw-r--r--src/stdlib/mbtowc.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/stdlib/mbtowc.c b/src/stdlib/mbtowc.c
index 015a4505..c2780bf6 100644
--- a/src/stdlib/mbtowc.c
+++ b/src/stdlib/mbtowc.c
@@ -6,6 +6,8 @@
int mbtowc(wchar_t * restrict pwc, const char * restrict s, size_t n)
{
SIGNAL_SAFE(0);
+ ASSERT_NOOVERLAP(pwc, sizeof(*pwc), s, n);
+
/* FIXME: forward dependency on AMD1 */
#if 0
static mbstate_t ps = 0;