gentoo-overlay/dev-libs/oniguruma/files/oniguruma-5.9.6-CVE-2017-9228.patch

https://github.com/kkos/oniguruma/issues/60
https://github.com/kkos/oniguruma/commit/3b63d12038c8d8fc278e81c942fa9bec7c704c8b

Author: K.Kosako <kosako@sofnec.co.jp>

--- a/regparse.c
+++ b/regparse.c
@@ -4081,7 +4081,9 @@
     }
   }
 
-  *state = CCS_VALUE;
+  if (*state != CCS_START)
+    *state = CCS_VALUE;
+
   *type  = CCV_CLASS;
   return 0;
 }