diff --git a/ap/libc/glibc/glibc-2.23/posix/bug-regex27.c b/ap/libc/glibc/glibc-2.23/posix/bug-regex27.c
new file mode 100644
index 0000000..8b29863
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/posix/bug-regex27.c
@@ -0,0 +1,63 @@
+/* Test REG_NEWLINE.
+   Copyright (C) 2007-2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2007.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <regex.h>
+#include <stdio.h>
+#include <string.h>
+
+struct tests
+{
+  const char *regex;
+  const char *string;
+  int cflags;
+  int retval;
+} tests[] = {
+  { "a.b", "a\nb", REG_EXTENDED | REG_NEWLINE, REG_NOMATCH },
+  { "a.b", "a\nb", REG_EXTENDED, 0 },
+  { "a[^x]b", "a\nb", REG_EXTENDED | REG_NEWLINE, REG_NOMATCH },
+  { "a[^x]b", "a\nb", REG_EXTENDED, 0 }
+};
+
+int
+main (void)
+{
+  regex_t r;
+  size_t i;
+  int ret = 0;
+
+  for (i = 0; i < sizeof (tests) / sizeof (tests[i]); ++i)
+    {
+      memset (&r, 0, sizeof (r));
+      if (regcomp (&r, tests[i].regex, tests[i].cflags))
+	{
+	  printf ("regcomp %zd failed\n", i);
+	  ret = 1;
+	  continue;
+	}
+      int rv = regexec (&r, tests[i].string, 0, NULL, 0);
+      if (rv != tests[i].retval)
+	{
+	  printf ("regexec %zd unexpected value %d != %d\n",
+		  i, rv, tests[i].retval);
+	  ret = 1;
+	}
+      regfree (&r);
+    }
+  return ret;
+}