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-rw-r--r--wcsmbs/wcsrtombs.c26
1 files changed, 16 insertions, 10 deletions
diff --git a/wcsmbs/wcsrtombs.c b/wcsmbs/wcsrtombs.c
index ba2d8dc3e2..27b1df8f6d 100644
--- a/wcsmbs/wcsrtombs.c
+++ b/wcsmbs/wcsrtombs.c
@@ -58,21 +58,27 @@ __wcsrtombs (dst, src, len, ps)
       const wchar_t *srcend = *src + __wcslen (*src) + 1;
       const wchar_t *inbuf = *src;
 
-      data.outbuf = buf;
       data.outbufend = buf + sizeof (buf);
 
       do
-	status = (*__wcsmbs_gconv_fcts.tomb->fct) (__wcsmbs_gconv_fcts.tomb,
-						   &data,
-						   (const char **) &inbuf,
-						   (const char *) srcend,
-						   &result, 0);
+	{
+	  data.outbuf = buf;
+
+	  status = (*__wcsmbs_gconv_fcts.tomb->fct) (__wcsmbs_gconv_fcts.tomb,
+						     &data,
+						     (const char **) &inbuf,
+						     (const char *) srcend,
+						     &result, 0);
+	}
       while (status == GCONV_FULL_OUTPUT);
 
-      if ((status == GCONV_OK || status == GCONV_EMPTY_INPUT)
-	  && data.outbuf[-1] == '\0')
-	/* Don't count the NUL character in.  */
-	--result;
+      if (status == GCONV_OK || status == GCONV_EMPTY_INPUT)
+	{
+	  /* There better should be a NUL byte at the end.  */
+	  assert (data.outbuf[-1] == '\0');
+	  /* Don't count the NUL character in.  */
+	  --result;
+	}
     }
   else
     {