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-rw-r--r--posix/regex_internal.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/posix/regex_internal.c b/posix/regex_internal.c
index c1605a0393..1da5f7040a 100644
--- a/posix/regex_internal.c
+++ b/posix/regex_internal.c
@@ -519,6 +519,8 @@ re_string_reconstruct (pstr, idx, eflags, newline)
 			mbstate_t cur_state;
 			wchar_t wc2;
 
+			/* XXX Don't use mbrtowc, we know which conversion
+			   to use (UTF-8 -> UCS4).  */
 			memset (&cur_state, 0, sizeof (cur_state));
 			if (mbrtowc (&wc2, p, raw + offset - p, &cur_state)
 			    == raw + offset - p)