27 files changed, 312 insertions, 208 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4a2e4da..3b262f1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@ cmake_minimum_required(VERSION 2.8)
 project(oniguruma C)
 
 set(PACKAGE onig)
-set(PACKAGE_VERSION "6.2.0")
+set(PACKAGE_VERSION "6.3.0")
 
 set(USE_COMBINATION_EXPLOSION_CHECK 0)
 set(USE_CRNL_AS_LINE_TERMINATOR 0)
diff --git a/HISTORY b/HISTORY
index e064c7a..74004e9 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,5 +1,16 @@
 History
 
+2017/05/29: Version 6.3.0
+
+2017/05/24: fix #60 : invalid state(CCS_VALUE) in parse_char_class()
+2017/05/24: fix #59 : access to invalid address by reg->dmax value
+2017/05/23: fix invalid increment of start position in onig_scan()
+2017/05/23: fix #58 : access to invalid address by reg->dmin value
+2017/05/23: fix #57 : DATA_ENSURE() check must be before data access
+2017/05/22: fix #56 : return invalid result for codepoint 0xFFFFFFFF
+2017/05/19: [new] add \o{17777777777} syntax.
+2017/05/19: fix #55 : Byte value expressed in octal must be smaller than 256
+
 2017/04/08: Version 6.2.0
 
 2017/03/15: fix: size in xmemcpy in stack_double (PR #51)
diff --git a/README.md b/README.md
index bfb41c7..a3abc75 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,12 @@ Supported character encodings:
 * CP1251:  contributed by Byte
 
 
+New feature of version 6.3.0
+--------------------------
+
+* NEW SYNTAX: escape-o-brace for octal codepoint.
+
+
 New feature of version 6.1.2
 --------------------------
 
diff --git a/configure.ac b/configure.ac
index 28ebdbf..1a7ca9b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 dnl Process this file with autoconf to produce a configure script.
-AC_INIT(onig, 6.2.0)
+AC_INIT(onig, 6.3.0)
 
 AC_CONFIG_MACRO_DIR([m4])
 
diff --git a/debian/README.source b/debian/README.source
new file mode 100644
index 0000000..e4f2b3d
--- /dev/null
+++ b/debian/README.source
@@ -0,0 +1,18 @@
+Hello,
+
+now I use the branching model from Vincent Driessen[1].
+
+I use the gitflow-avh[2]. with the Documentation[3].
+The Debian package can be found here[4].
+
+Please upload unattended uploads use a branch feature/<your title>.
+
+
+Many thanks.
+
+ -- Jörg Frings-Fürst <debian@jff-webhosting.net>  Fri, 02 Jun 2017 19:00:40 +0200
+
+[1] http://nvie.com/posts/a-successful-git-branching-model/
+[2] https://github.com/petervanderdoes/gitflow-avh
+[3] https://github.com/petervanderdoes/gitflow-avh/wiki
+[4] https://tracker.debian.org/pkg/git-flow
diff --git a/debian/changelog b/debian/changelog
index 7a8155d..b7b74ad 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,12 +1,19 @@
-libonig (6.2.0-1) unstable; urgency=medium
+libonig (6.3.0-1) unstable; urgency=medium
 
   * New upstream release.
     - Update symbols file.
-  * Drop dh-autoreconf from both build-depends and dh --with arguments 
+    - Refresh patches.
+  * Drop dh-autoreconf from both build-depends and dh --with arguments.
     because this is all defaults when using dh compat 10.
   * debian/copyright: Add year 2017.
-
- -- Jörg Frings-Fürst <debian@jff-webhosting.net>  Sun, 09 Apr 2017 20:00:40 +0200
+  * Remove upstream applied debian/patches/0500-CVE-2017-922[4-9].patch.
+  * Use the automatic debug symbol packages:
+    - Remove libonig4-dbg section from debian/control.
+    - Remove override_dh_strip from debian/rules.
+  * New README.source to explain the branching model used.
+  * Declare compliance with Debian Policy 4.0.0. (No changes needed).
+
+ -- Jörg Frings-Fürst <debian@jff-webhosting.net>  Sun, 25 Jun 2017 09:55:31 +0200
 
 libonig (6.1.3-2) unstable; urgency=high
 
diff --git a/debian/control b/debian/control
index c5fbb3d..6b25f28 100644
--- a/debian/control
+++ b/debian/control
@@ -4,7 +4,7 @@ Priority: extra
 Maintainer: Jörg Frings-Fürst <debian@jff-webhosting.net>
 Build-Depends:
  debhelper (>= 10)
-Standards-Version: 3.9.8
+Standards-Version: 4.0.0
 Homepage: https://github.com/kkos/oniguruma
 Vcs-Git: https://anonscm.debian.org/cgit/collab-maint/libonig.git
 Vcs-Browser: https://anonscm.debian.org/cgit/collab-maint/libonig.git
@@ -24,23 +24,6 @@ Description: regular expressions library
  Different character encoding for every regular expression object can
  be specified.
 
-Package: libonig4-dbg
-Section: debug
-Architecture: any
-Multi-Arch: same
-Depends:
- ${misc:Depends},
- libonig4 (= ${binary:Version})
-Pre-Depends:
- ${misc:Pre-Depends}
-Description: regular expressions library — debugging symbols
- Oniguruma is a library for working with regular expressions.
- .
- Different character encoding for every regular expression object can
- be specified.
- .
- This package provides the debugging symbols.
-
 Package: libonig-dev
 Section: libdevel
 Priority: optional
diff --git a/debian/patches/0100-source_typos.patch b/debian/patches/0100-source_typos.patch
index fe1bca0..ec96ad2 100644
--- a/debian/patches/0100-source_typos.patch
+++ b/debian/patches/0100-source_typos.patch
@@ -7,7 +7,7 @@ Index: trunk/src/regerror.c
 ===================================================================
 --- trunk.orig/src/regerror.c
 +++ trunk/src/regerror.c
-@@ -65,7 +65,7 @@ onig_error_code_to_format(int code)
+@@ -67,7 +67,7 @@ onig_error_code_to_format(int code)
    case ONIGERR_UNEXPECTED_BYTECODE:
      p = "unexpected bytecode (bug)"; break;
    case ONIGERR_DEFAULT_ENCODING_IS_NOT_SETTED:
diff --git a/debian/patches/series b/debian/patches/series
index 06ee93d..2f55f57 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -1,3 +1,3 @@
 #001-changes_build_sys.diff
 0100-source_typos.patch
-0500-CVE-2017-922[4-9].patch
+#0500-CVE-2017-922[4-9].patch
diff --git a/debian/rules b/debian/rules
index 69ed6ac..32be672 100755
--- a/debian/rules
+++ b/debian/rules
@@ -22,9 +22,6 @@ VERSION = $(shell head -n1 debian/changelog | sed -e 's/.*(//;s/-.*).*//;s/\+/\-
 %:
 	dh $@
 
-override_dh_strip:
-	dh_strip --dbg-package=libonig4-dbg
-
 override_dh_install:
 	$(RM) debian/tmp/usr/bin/onig-config
 	dh_install --fail-missing -X.la -X.a
diff --git a/dist.info b/dist.info
index 720e856..48b9439 100644
--- a/dist.info
+++ b/dist.info
@@ -1,7 +1,7 @@
 --- This file is part of LuaDist project
 
 name = "onig"
-version = "6.2.0"
+version = "6.3.0"
 
 desc = "Oniguruma is a regular expressions library."
 author = "K.Kosako"
diff --git a/doc/RE b/doc/RE
index e8a6aa4..1685415 100644
--- a/doc/RE
+++ b/doc/RE
@@ -1,4 +1,4 @@
-Oniguruma Regular Expressions Version 6.0.0    2016/08/18
+Oniguruma Regular Expressions Version 6.3.0    2017/05/19
 
 syntax: ONIG_SYNTAX_RUBY (default)
 
@@ -22,6 +22,7 @@ syntax: ONIG_SYNTAX_RUBY (default)
   \a           bell                   (0x07)
   \e           escape                 (0x1B)
   \nnn         octal char             (encoded byte value)
+  \o{17777777777} wide octal char     (character code point value)
   \xHH         hexadecimal char       (encoded byte value)
   \x{7HHHHHHH} wide hexadecimal char  (character code point value)
   \cx          control char           (character code point value)
diff --git a/doc/RE.ja b/doc/RE.ja
index cf89c8f..5c09100 100644
--- a/doc/RE.ja
+++ b/doc/RE.ja
@@ -1,4 +1,4 @@
-���� ����ɽ�� Version 6.0.0    2016/05/02
+���� ����ɽ�� Version 6.3.0    2017/05/19
 
 ����ʸˡ: ONIG_SYNTAX_RUBY (������)
 
@@ -13,21 +13,22 @@
 
 2. ʸ��
 
-  \t           ��ʿ����         (0x09)
-  \v           ��ľ����         (0x0B)
-  \n           ����             (0x0A)
-  \r           ����             (0x0D)
-  \b           �������         (0x08)
-  \f           ����             (0x0C)
-  \a           ��               (0x07)
-  \e           ���򽤾�         (0x1B)
-  \nnn         Ȭ�ʿ�ɽ��        ��沽�Х�����(�ΰ���)
-  \xHH         ��ϻ�ʿ�ɽ��      ��沽�Х�����(�ΰ���)
-  \x{7HHHHHHH} ��ĥ��ϻ�ʿ�ɽ��  �����ɥݥ������
-  \cx          ����ʸ��ɽ��      �����ɥݥ������
-  \C-x         ����ʸ��ɽ��      �����ɥݥ������
-  \M-x         Ķ  (x|0x80)      �����ɥݥ������
-  \M-\C-x      Ķ + ����ʸ��ɽ�� �����ɥݥ������
+  \t              ��ʿ����         (0x09)
+  \v              ��ľ����         (0x0B)
+  \n              ����             (0x0A)
+  \r              ����             (0x0D)
+  \b              �������         (0x08)
+  \f              ����             (0x0C)
+  \a              ��               (0x07)
+  \e              ���򽤾�         (0x1B)
+  \nnn            Ȭ�ʿ�ɽ��        ��沽�Х�����(�ΰ���)
+  \o{17777777777} ��ĥȬ�ʿ�ɽ��    �����ɥݥ������
+  \xHH            ��ϻ�ʿ�ɽ��      ��沽�Х�����(�ΰ���)
+  \x{7HHHHHHH}    ��ĥ��ϻ�ʿ�ɽ��  �����ɥݥ������
+  \cx             ����ʸ��ɽ��      �����ɥݥ������
+  \C-x            ����ʸ��ɽ��      �����ɥݥ������
+  \M-x            Ķ  (x|0x80)     �����ɥݥ������
+  \M-\C-x         Ķ + ����ʸ��ɽ�� �����ɥݥ������
 
   �� \b�ϡ�ʸ��������ǤΤ�ͭ��
 
diff --git a/index.html b/index.html
index 24a4a83..79e4de0 100644
--- a/index.html
+++ b/index.html
@@ -8,7 +8,7 @@
 <h1>Oniguruma</h1> (<a href="index_ja.html">Japanese</a>)
 
 <p>
-(c) K.Kosako, updated at: 2017/04/06
+(c) K.Kosako, updated at: 2017/05/26
 </p>
 
 <dl>
@@ -16,12 +16,9 @@
 <dt><b>What's new</b>
 </font>
 <ul>
+<li>2017/05/29: Version 6.3.0 released.</li>
 <li>2017/04/08: Version 6.2.0 released.</li>
 <li>2016/12/11: Version 6.1.3 released.</li>
-<li>2016/11/07: Version 6.1.2 released.</li>
-<li>2016/09/02: Version 6.1.1 released.</li>
-<li>2016/08/29: Version 6.1.0 released.</li>
-<li>2014/12/12: Version 5.9.6 released.</li>
 </ul>
 </dl>
 <hr>
diff --git a/index_ja.html b/index_ja.html
index 7bae60e..7070dfe 100644
--- a/index_ja.html
+++ b/index_ja.html
@@ -8,7 +8,7 @@
 <h1>鬼車</h1>
 
 <p>
-(c) K.Kosako, 最終更新: 2017/04/06
+(c) K.Kosako, 最終更新: 2017/05/26
 </p>
 
 <dl>
@@ -16,12 +16,9 @@
 <dt><b>更新情報</b>
 </font>
 <ul>
+<li>2017/05/29: Version 6.3.0 リリース</li>
 <li>2017/04/08: Version 6.2.0 リリース</li>
 <li>2016/12/11: Version 6.1.3 リリース</li>
-<li>2016/11/07: Version 6.1.2 リリース</li>
-<li>2016/09/02: Version 6.1.1 リリース</li>
-<li>2016/08/29: Version 6.1.0 リリース</li>
-<li>2014/12/12: Version 5.9.6 リリース</li>
 </ul>
 </dl>
 <hr>
diff --git a/src/gperf_unfold_key_conv.py b/src/gperf_unfold_key_conv.py
index dcd8587..34f9c2f 100755
--- a/src/gperf_unfold_key_conv.py
+++ b/src/gperf_unfold_key_conv.py
@@ -36,7 +36,7 @@ def parse_line(s):
     if r != s: return r
     r = re.sub(REG_GET_CODE, 'OnigCodePoint gcode = wordlist[key].code;', s)
     if r != s: return r
-    r = re.sub(REG_CODE_CHECK, 'if (code == gcode)', s)
+    r = re.sub(REG_CODE_CHECK, 'if (code == gcode && wordlist[key].index >= 0)', s)
     if r != s: return r
 
     return s
diff --git a/src/oniguruma.h b/src/oniguruma.h
index 33e2a0a..02d4254 100644
--- a/src/oniguruma.h
+++ b/src/oniguruma.h
@@ -35,7 +35,7 @@ extern "C" {
 
 #define ONIGURUMA
 #define ONIGURUMA_VERSION_MAJOR   6
-#define ONIGURUMA_VERSION_MINOR   2
+#define ONIGURUMA_VERSION_MINOR   3
 #define ONIGURUMA_VERSION_TEENY   0
 
 #ifdef __cplusplus
@@ -473,6 +473,7 @@ ONIG_EXTERN OnigSyntaxType*   OnigDefaultSyntax;
 #define ONIG_SYN_OP_ESC_OCTAL3                  (1U<<28)  /* \OOO */
 #define ONIG_SYN_OP_ESC_X_HEX2                  (1U<<29)  /* \xHH */
 #define ONIG_SYN_OP_ESC_X_BRACE_HEX8            (1U<<30)  /* \x{7HHHHHHH} */
+#define ONIG_SYN_OP_ESC_O_BRACE_OCTAL           (1U<<31)  /* \o{1OOOOOOOOOO} */
 
 #define ONIG_SYN_OP2_ESC_CAPITAL_Q_QUOTE        (1U<<0)  /* \Q...\E */
 #define ONIG_SYN_OP2_QMARK_GROUP_EFFECT         (1U<<1)  /* (?...) */
diff --git a/src/regcomp.c b/src/regcomp.c
index 5c924b5..0e9a9ab 100644
--- a/src/regcomp.c
+++ b/src/regcomp.c
@@ -2,7 +2,7 @@
   regcomp.c -  Oniguruma (regular expression library)
 **********************************************************************/
 /*-
- * Copyright (c) 2002-2016  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
+ * Copyright (c) 2002-2017  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -761,17 +761,17 @@ compile_length_quantifier_node(QtfrNode* qn, regex_t* reg)
   if (infinite && qn->lower <= 1) {
     if (qn->greedy) {
       if (qn->lower == 1)
-	len = SIZE_OP_JUMP;
+        len = SIZE_OP_JUMP;
       else
-	len = 0;
+        len = 0;
 
       len += SIZE_OP_PUSH + cklen + mod_tlen + SIZE_OP_JUMP;
     }
     else {
       if (qn->lower == 0)
-	len = SIZE_OP_JUMP;
+        len = SIZE_OP_JUMP;
       else
-	len = 0;
+        len = 0;
 
       len += mod_tlen + SIZE_OP_PUSH + cklen;
     }
@@ -785,10 +785,10 @@ compile_length_quantifier_node(QtfrNode* qn, regex_t* reg)
   else if (qn->upper == 1 && qn->greedy) {
     if (qn->lower == 0) {
       if (CKN_ON) {
-	len = SIZE_OP_STATE_CHECK_PUSH + tlen;
+        len = SIZE_OP_STATE_CHECK_PUSH + tlen;
       }
       else {
-	len = SIZE_OP_PUSH + tlen;
+        len = SIZE_OP_PUSH + tlen;
       }
     }
     else {
@@ -1255,7 +1255,7 @@ compile_length_enclose_node(EncloseNode* node, regex_t* reg)
       if (tlen < 0) return tlen;
 
       len = tlen * qn->lower
-	  + SIZE_OP_PUSH + tlen + SIZE_OP_POP + SIZE_OP_JUMP;
+        + SIZE_OP_PUSH + tlen + SIZE_OP_POP + SIZE_OP_JUMP;
     }
     else {
       len = SIZE_OP_PUSH_STOP_BT + tlen + SIZE_OP_POP_STOP_BT;
@@ -1362,7 +1362,7 @@ compile_enclose_node(EncloseNode* node, regex_t* reg)
       r = add_opcode(reg, OP_POP);
       if (r) return r;
       r = add_opcode_rel_addr(reg, OP_JUMP,
-	 -((int )SIZE_OP_PUSH + len + (int )SIZE_OP_POP + (int )SIZE_OP_JUMP));
+             -((int )SIZE_OP_PUSH + len + (int )SIZE_OP_POP + (int )SIZE_OP_JUMP));
     }
     else {
       r = add_opcode(reg, OP_PUSH_STOP_BT);
@@ -2145,16 +2145,16 @@ get_char_length_tree1(Node* node, regex_t* reg, int* len, int level)
       switch (en->type) {
       case ENCLOSE_MEMORY:
 #ifdef USE_SUBEXP_CALL
-	if (IS_ENCLOSE_CLEN_FIXED(en))
-	  *len = en->char_len;
-	else {
-	  r = get_char_length_tree1(en->target, reg, len, level);
-	  if (r == 0) {
-	    en->char_len = *len;
-	    SET_ENCLOSE_STATUS(node, NST_CLEN_FIXED);
-	  }
-	}
-	break;
+        if (IS_ENCLOSE_CLEN_FIXED(en))
+          *len = en->char_len;
+        else {
+          r = get_char_length_tree1(en->target, reg, len, level);
+          if (r == 0) {
+            en->char_len = *len;
+            SET_ENCLOSE_STATUS(node, NST_CLEN_FIXED);
+          }
+        }
+        break;
 #endif
       case ENCLOSE_OPTION:
       case ENCLOSE_STOP_BACKTRACK:
@@ -2594,17 +2594,17 @@ get_min_len(Node* node, OnigLen *min, ScanEnv* env)
         if (IS_ENCLOSE_MIN_FIXED(en))
           *min = en->min_len;
         else {
-	  if (IS_ENCLOSE_MARK1(NENCLOSE(node)))
-	    *min = 0;  // recursive
-	  else {
-	    SET_ENCLOSE_STATUS(node, NST_MARK1);
-	    r = get_min_len(en->target, min, env);
-	    CLEAR_ENCLOSE_STATUS(node, NST_MARK1);
-	    if (r == 0) {
-	      en->min_len = *min;
-	      SET_ENCLOSE_STATUS(node, NST_MIN_FIXED);
-	    }
-	  }
+          if (IS_ENCLOSE_MARK1(NENCLOSE(node)))
+            *min = 0;  // recursive
+          else {
+            SET_ENCLOSE_STATUS(node, NST_MARK1);
+            r = get_min_len(en->target, min, env);
+            CLEAR_ENCLOSE_STATUS(node, NST_MARK1);
+            if (r == 0) {
+              en->min_len = *min;
+              SET_ENCLOSE_STATUS(node, NST_MIN_FIXED);
+            }
+          }
         }
         break;
 
@@ -2713,22 +2713,22 @@ get_max_len(Node* node, OnigLen *max, ScanEnv* env)
       EncloseNode* en = NENCLOSE(node);
       switch (en->type) {
       case ENCLOSE_MEMORY:
-	if (IS_ENCLOSE_MAX_FIXED(en))
-	  *max = en->max_len;
-	else {
-	  if (IS_ENCLOSE_MARK1(NENCLOSE(node)))
-	    *max = ONIG_INFINITE_DISTANCE;
-	  else {
-	    SET_ENCLOSE_STATUS(node, NST_MARK1);
-	    r = get_max_len(en->target, max, env);
-	    CLEAR_ENCLOSE_STATUS(node, NST_MARK1);
-	    if (r == 0) {
-	      en->max_len = *max;
-	      SET_ENCLOSE_STATUS(node, NST_MAX_FIXED);
-	    }
-	  }
-	}
-	break;
+        if (IS_ENCLOSE_MAX_FIXED(en))
+          *max = en->max_len;
+        else {
+          if (IS_ENCLOSE_MARK1(NENCLOSE(node)))
+            *max = ONIG_INFINITE_DISTANCE;
+          else {
+            SET_ENCLOSE_STATUS(node, NST_MARK1);
+            r = get_max_len(en->target, max, env);
+            CLEAR_ENCLOSE_STATUS(node, NST_MARK1);
+            if (r == 0) {
+              en->max_len = *max;
+              SET_ENCLOSE_STATUS(node, NST_MAX_FIXED);
+            }
+          }
+        }
+        break;
 
       case ENCLOSE_OPTION:
       case ENCLOSE_STOP_BACKTRACK:
@@ -4559,7 +4559,7 @@ concat_left_node_opt_info(OnigEncoding enc, NodeOptInfo* to, NodeOptInfo* add)
   if (to->expr.len > 0) {
     if (add->len.max > 0) {
       if (to->expr.len > (int )add->len.max)
-	to->expr.len = add->len.max;
+        to->expr.len = add->len.max;
 
       if (to->expr.mmd.max == 0)
         select_opt_exact_info(enc, &to->exb, &to->expr);
@@ -4957,7 +4957,7 @@ set_optimize_exact_info(regex_t* reg, OptExactInfo* e)
     reg->exact_end = reg->exact + e->len;
  
     allow_reverse =
-	ONIGENC_IS_ALLOWED_REVERSE_MATCH(reg->enc, reg->exact, reg->exact_end);
+      ONIGENC_IS_ALLOWED_REVERSE_MATCH(reg->enc, reg->exact, reg->exact_end);
 
     if (e->len >= 3 || (e->len >= 2 && allow_reverse)) {
       r = set_bm_skip(reg->exact, reg->exact_end, reg->enc,
@@ -5045,7 +5045,7 @@ set_optimize_info_from_tree(Node* node, regex_t* reg, ScanEnv* scan_env)
   if (opt.exb.len > 0 || opt.exm.len > 0) {
     select_opt_exact_info(reg->enc, &opt.exb, &opt.exm);
     if (opt.map.value > 0 &&
-	comp_opt_exact_or_map_info(&opt.exb, &opt.map) > 0) {
+        comp_opt_exact_or_map_info(&opt.exb, &opt.map) > 0) {
       goto set_map;
     }
     else {
diff --git a/src/regexec.c b/src/regexec.c
index 35fef11..c0626ef 100644
--- a/src/regexec.c
+++ b/src/regexec.c
@@ -2,7 +2,7 @@
   regexec.c -  Oniguruma (regular expression library)
 **********************************************************************/
 /*-
- * Copyright (c) 2002-2016  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
+ * Copyright (c) 2002-2017  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -1346,8 +1346,8 @@ match_at(regex_t* reg, const UChar* str, const UChar* end,
       fprintf(stderr, "%4d> \"", (int )(s - str));
       bp = buf;
       for (i = 0, q = s; i < 7 && q < end; i++) {
-	len = enclen(encode, q);
-	while (len-- > 0) *bp++ = *q++;
+        len = enclen(encode, q);
+        while (len-- > 0) *bp++ = *q++;
       }
       if (q < end) { xmemcpy(bp, "...\"", 4); bp += 4; }
       else         { xmemcpy(bp, "\"",    1); bp += 1; }
@@ -1473,14 +1473,9 @@ match_at(regex_t* reg, const UChar* str, const UChar* end,
       break;
 
     case OP_EXACT1:  MOP_IN(OP_EXACT1);
-#if 0
       DATA_ENSURE(1);
       if (*p != *s) goto fail;
       p++; s++;
-#endif
-      if (*p != *s++) goto fail;
-      DATA_ENSURE(0);
-      p++;
       MOP_OUT;
       break;
 
@@ -3159,6 +3154,8 @@ forward_search_range(regex_t* reg, const UChar* str, const UChar* end, UChar* s,
     }
     else {
       UChar *q = p + reg->dmin;
+
+      if (q >= end) return 0; /* fail */
       while (p < q) p += enclen(reg->enc, p);
     }
   }
@@ -3238,18 +3235,25 @@ forward_search_range(regex_t* reg, const UChar* str, const UChar* end, UChar* s,
     }
     else {
       if (reg->dmax != ONIG_INFINITE_DISTANCE) {
-        *low = p - reg->dmax;
-        if (*low > s) {
-          *low = onigenc_get_right_adjust_char_head_with_prev(reg->enc, s,
-                                          *low, (const UChar** )low_prev);
-          if (low_prev && IS_NULL(*low_prev))
-            *low_prev = onigenc_get_prev_char_head(reg->enc,
-                                                   (pprev ? pprev : s), *low);
+        if (p - str < reg->dmax) {
+          *low = (UChar* )str;
+          if (low_prev)
+            *low_prev = onigenc_get_prev_char_head(reg->enc, str, *low);
         }
         else {
-          if (low_prev)
-            *low_prev = onigenc_get_prev_char_head(reg->enc,
-                                                   (pprev ? pprev : str), *low);
+          *low = p - reg->dmax;
+          if (*low > s) {
+            *low = onigenc_get_right_adjust_char_head_with_prev(reg->enc, s,
+                                                 *low, (const UChar** )low_prev);
+            if (low_prev && IS_NULL(*low_prev))
+              *low_prev = onigenc_get_prev_char_head(reg->enc,
+                                                     (pprev ? pprev : s), *low);
+          }
+          else {
+            if (low_prev)
+              *low_prev = onigenc_get_prev_char_head(reg->enc,
+                                                     (pprev ? pprev : str), *low);
+          }
         }
       }
     }
@@ -3790,8 +3794,10 @@ onig_scan(regex_t* reg, const UChar* str, const UChar* end,
       if (rs != 0)
         return rs;
 
-      if (region->end[0] == start - str)
-        start++;
+      if (region->end[0] == start - str) {
+        if (start >= end) break;
+        start += enclen(reg->enc, start);
+      }
       else
         start = str + region->end[0];
 
diff --git a/src/regparse.c b/src/regparse.c
index 11f9e34..8153513 100644
--- a/src/regparse.c
+++ b/src/regparse.c
@@ -2,7 +2,7 @@
   regparse.c -  Oniguruma (regular expression library)
 **********************************************************************/
 /*-
- * Copyright (c) 2002-2016  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
+ * Copyright (c) 2002-2017  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -41,7 +41,8 @@
 OnigSyntaxType OnigSyntaxRuby = {
   (( SYN_GNU_REGEX_OP | ONIG_SYN_OP_QMARK_NON_GREEDY |
      ONIG_SYN_OP_ESC_OCTAL3 | ONIG_SYN_OP_ESC_X_HEX2 |
-     ONIG_SYN_OP_ESC_X_BRACE_HEX8 | ONIG_SYN_OP_ESC_CONTROL_CHARS |
+     ONIG_SYN_OP_ESC_X_BRACE_HEX8 | ONIG_SYN_OP_ESC_O_BRACE_OCTAL |
+     ONIG_SYN_OP_ESC_CONTROL_CHARS |
      ONIG_SYN_OP_ESC_C_CONTROL )
    & ~ONIG_SYN_OP_ESC_LTGT_WORD_BEGIN_END )
   , ( ONIG_SYN_OP2_QMARK_GROUP_EFFECT |
@@ -553,8 +554,8 @@ i_names(UChar* key ARG_UNUSED, NameEntry* e, INamesArg* arg)
   int r = (*(arg->func))(e->name,
                          e->name + e->name_len,
                          e->back_num,
-			 (e->back_num > 1 ? e->back_refs : &(e->back_ref1)),
-			 arg->reg, arg->arg);
+                         (e->back_num > 1 ? e->back_refs : &(e->back_ref1)),
+                         arg->reg, arg->arg);
   if (r != 0) {
     arg->ret = r;
     return ST_STOP;
@@ -1053,7 +1054,7 @@ onig_node_free(Node* node)
   switch (NTYPE(node)) {
   case NT_STR:
     if (NSTR(node)->capa != 0 &&
-	IS_NOT_NULL(NSTR(node)->s) && NSTR(node)->s != NSTR(node)->buf) {
+        IS_NOT_NULL(NSTR(node)->s) && NSTR(node)->s != NSTR(node)->buf) {
       xfree(NSTR(node)->s);
     }
     break;
@@ -2519,8 +2520,8 @@ fetch_name_with_level(OnigCodePoint start_code, UChar** src, UChar* end,
       int flag = (c == '-' ? -1 : 1);
 
       if (PEND) {
-	r = ONIGERR_INVALID_CHAR_IN_GROUP_NAME;
-	goto end;
+        r = ONIGERR_INVALID_CHAR_IN_GROUP_NAME;
+        goto end;
       }
       PFETCH(c);
       if (! ONIGENC_IS_CODE_DIGIT(enc, c)) goto err;
@@ -2531,9 +2532,9 @@ fetch_name_with_level(OnigCodePoint start_code, UChar** src, UChar* end,
       exist_level = 1;
 
       if (!PEND) {
-	PFETCH(c);
-	if (c == end_code)
-	  goto end;
+        PFETCH(c);
+        if (c == end_code)
+          goto end;
       }
     }
 
@@ -2945,19 +2946,46 @@ fetch_token_in_cc(OnigToken* tok, UChar** src, UChar* end, ScanEnv* env)
 
       c2 = PPEEK;
       if (c2 == '{' &&
-	  IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_P_BRACE_CHAR_PROPERTY)) {
-	PINC;
-	tok->type = TK_CHAR_PROPERTY;
-	tok->u.prop.not = (c == 'P' ? 1 : 0);
-
-	if (!PEND && IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_P_BRACE_CIRCUMFLEX_NOT)) {
-	  PFETCH(c2);
-	  if (c2 == '^') {
-	    tok->u.prop.not = (tok->u.prop.not == 0 ? 1 : 0);
-	  }
-	  else
-	    PUNFETCH;
-	}
+          IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_P_BRACE_CHAR_PROPERTY)) {
+        PINC;
+        tok->type = TK_CHAR_PROPERTY;
+        tok->u.prop.not = (c == 'P' ? 1 : 0);
+
+        if (!PEND && IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_P_BRACE_CIRCUMFLEX_NOT)) {
+          PFETCH(c2);
+          if (c2 == '^') {
+            tok->u.prop.not = (tok->u.prop.not == 0 ? 1 : 0);
+          }
+          else
+            PUNFETCH;
+        }
+      }
+      break;
+
+    case 'o':
+      if (PEND) break;
+
+      prev = p;
+      if (PPEEK_IS('{') && IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_O_BRACE_OCTAL)) {
+        PINC;
+        num = scan_unsigned_octal_number(&p, end, 11, enc);
+        if (num < 0) return ONIGERR_TOO_BIG_WIDE_CHAR_VALUE;
+        if (!PEND) {
+          c2 = PPEEK;
+          if (ONIGENC_IS_CODE_DIGIT(enc, c2))
+            return ONIGERR_TOO_LONG_WIDE_CHAR_VALUE;
+        }
+
+        if (p > prev + enclen(enc, prev) && !PEND && (PPEEK_IS('}'))) {
+          PINC;
+          tok->type   = TK_CODE_POINT;
+          tok->base   = 8;
+          tok->u.code = (OnigCodePoint )num;
+        }
+        else {
+          /* can't read nothing or invalid format */
+          p = prev;
+        }
       }
       break;
 
@@ -3020,7 +3048,7 @@ fetch_token_in_cc(OnigToken* tok, UChar** src, UChar* end, ScanEnv* env)
         PUNFETCH;
         prev = p;
         num = scan_unsigned_octal_number(&p, end, 3, enc);
-        if (num < 0) return ONIGERR_TOO_BIG_NUMBER;
+        if (num < 0 || num >= 256) return ONIGERR_TOO_BIG_NUMBER;
         if (p == prev) {  /* can't read nothing. */
           num = 0; /* but, it's not error */
         }
@@ -3132,7 +3160,7 @@ fetch_token(OnigToken* tok, UChar** src, UChar* end, ScanEnv* env)
       tok->u.repeat.upper = 1;
     greedy_check:
       if (!PEND && PPEEK_IS('?') &&
-	  IS_SYNTAX_OP(syn, ONIG_SYN_OP_QMARK_NON_GREEDY)) {
+          IS_SYNTAX_OP(syn, ONIG_SYN_OP_QMARK_NON_GREEDY)) {
         PFETCH(c);
         tok->u.repeat.greedy     = 0;
         tok->u.repeat.possessive = 0;
@@ -3302,6 +3330,31 @@ fetch_token(OnigToken* tok, UChar** src, UChar* end, ScanEnv* env)
       goto end_buf;
       break;
 
+    case 'o':
+      if (PEND) break;
+
+      prev = p;
+      if (PPEEK_IS('{') && IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_O_BRACE_OCTAL)) {
+        PINC;
+        num = scan_unsigned_octal_number(&p, end, 11, enc);
+        if (num < 0) return ONIGERR_TOO_BIG_WIDE_CHAR_VALUE;
+        if (!PEND) {
+          if (ONIGENC_IS_CODE_DIGIT(enc, PPEEK))
+            return ONIGERR_TOO_LONG_WIDE_CHAR_VALUE;
+        }
+
+        if ((p > prev + enclen(enc, prev)) && !PEND && PPEEK_IS('}')) {
+          PINC;
+          tok->type   = TK_CODE_POINT;
+          tok->u.code = (OnigCodePoint )num;
+        }
+        else {
+          /* can't read nothing or invalid format */
+          p = prev;
+        }
+      }
+      break;
+
     case 'x':
       if (PEND) break;
 
@@ -3392,7 +3445,7 @@ fetch_token(OnigToken* tok, UChar** src, UChar* end, ScanEnv* env)
       if (IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_OCTAL3)) {
         prev = p;
         num = scan_unsigned_octal_number(&p, end, (c == '0' ? 2:3), enc);
-        if (num < 0) return ONIGERR_TOO_BIG_NUMBER;
+        if (num < 0 || num >= 256) return ONIGERR_TOO_BIG_NUMBER;
         if (p == prev) {  /* can't read nothing. */
           num = 0; /* but, it's not error */
         }
@@ -3541,7 +3594,7 @@ fetch_token(OnigToken* tok, UChar** src, UChar* end, ScanEnv* env)
         }
         else { /* string */
           p = tok->backp + enclen(enc, tok->backp);
-	}
+        }
       }
       break;
     }
@@ -3753,8 +3806,7 @@ add_ctype_to_cc_by_range(CClassNode* cc, int ctype ARG_UNUSED, int not,
     OnigCodePoint prev = 0;
 
     for (i = 0; i < n; i++) {
-      for (j = prev;
-	   j < ONIGENC_CODE_RANGE_FROM(mbr, i); j++) {
+      for (j = prev; j < ONIGENC_CODE_RANGE_FROM(mbr, i); j++) {
         if (j >= sb_out) {
           goto sb_end2;
         }
@@ -4028,14 +4080,16 @@ next_state_class(CClassNode* cc, OnigCodePoint* vs, enum CCVALTYPE* type,
     }
   }
 
-  *state = CCS_VALUE;
+  if (*state != CCS_START)
+    *state = CCS_VALUE;
+
   *type  = CCV_CLASS;
   return 0;
 }
 
 static int
-next_state_val(CClassNode* cc, OnigCodePoint *vs, OnigCodePoint v,
-	       int* vs_israw, int v_israw,
+next_state_val(CClassNode* cc, OnigCodePoint *from, OnigCodePoint to,
+	       int* from_israw, int to_israw,
 	       enum CCVALTYPE intype, enum CCVALTYPE* type,
 	       enum CCSTATE* state, ScanEnv* env)
 {
@@ -4044,10 +4098,13 @@ next_state_val(CClassNode* cc, OnigCodePoint *vs, OnigCodePoint v,
   switch (*state) {
   case CCS_VALUE:
     if (*type == CCV_SB) {
-      BITSET_SET_BIT(cc->bs, (int )(*vs));
+      if (*from > 0xff)
+          return ONIGERR_INVALID_CODE_POINT_VALUE;
+
+      BITSET_SET_BIT(cc->bs, (int )(*from));
     }
     else if (*type == CCV_CODE_POINT) {
-      r = add_code_range(&(cc->mbuf), env, *vs, *vs);
+      r = add_code_range(&(cc->mbuf), env, *from, *from);
       if (r < 0) return r;
     }
     break;
@@ -4055,40 +4112,32 @@ next_state_val(CClassNode* cc, OnigCodePoint *vs, OnigCodePoint v,
   case CCS_RANGE:
     if (intype == *type) {
       if (intype == CCV_SB) {
-        if (*vs > 0xff || v > 0xff)
+        if (*from > 0xff || to > 0xff)
           return ONIGERR_INVALID_CODE_POINT_VALUE;
 
-        if (*vs > v) {
+        if (*from > to) {
           if (IS_SYNTAX_BV(env->syntax, ONIG_SYN_ALLOW_EMPTY_RANGE_IN_CC))
             goto ccs_range_end;
           else
             return ONIGERR_EMPTY_RANGE_IN_CHAR_CLASS;
         }
-        bitset_set_range(cc->bs, (int )*vs, (int )v);
+        bitset_set_range(cc->bs, (int )*from, (int )to);
       }
       else {
-        r = add_code_range(&(cc->mbuf), env, *vs, v);
+        r = add_code_range(&(cc->mbuf), env, *from, to);
         if (r < 0) return r;
       }
     }
     else {
-#if 0
-      if (intype == CCV_CODE_POINT && *type == CCV_SB) {
-#endif
-        if (*vs > v) {
-          if (IS_SYNTAX_BV(env->syntax, ONIG_SYN_ALLOW_EMPTY_RANGE_IN_CC))
-            goto ccs_range_end;
-          else
-            return ONIGERR_EMPTY_RANGE_IN_CHAR_CLASS;
-        }
-        bitset_set_range(cc->bs, (int )*vs, (int )(v < 0xff ? v : 0xff));
-        r = add_code_range(&(cc->mbuf), env, (OnigCodePoint )*vs, v);
-        if (r < 0) return r;
-#if 0
+      if (*from > to) {
+        if (IS_SYNTAX_BV(env->syntax, ONIG_SYN_ALLOW_EMPTY_RANGE_IN_CC))
+          goto ccs_range_end;
+        else
+          return ONIGERR_EMPTY_RANGE_IN_CHAR_CLASS;
       }
-      else
-        return ONIGERR_MISMATCH_CODE_LENGTH_IN_CLASS_RANGE;
-#endif
+      bitset_set_range(cc->bs, (int )*from, (int )(to < 0xff ? to : 0xff));
+      r = add_code_range(&(cc->mbuf), env, (OnigCodePoint )*from, to);
+      if (r < 0) return r;
     }
   ccs_range_end:
     *state = CCS_COMPLETE;
@@ -4103,9 +4152,9 @@ next_state_val(CClassNode* cc, OnigCodePoint *vs, OnigCodePoint v,
     break;
   }
 
-  *vs_israw = v_israw;
-  *vs       = v;
-  *type     = intype;
+  *from_israw = to_israw;
+  *from       = to;
+  *type       = intype;
   return 0;
 }
 
@@ -4366,9 +4415,9 @@ parse_char_class(Node** np, OnigToken* tok, UChar** src, UChar* end,
 
         r = parse_char_class(&anode, tok, &p, end, env);
         if (r != 0) {
-	  onig_node_free(anode);
-	  goto cc_open_err;
-	}
+          onig_node_free(anode);
+          goto cc_open_err;
+        }
         acc = NCCLASS(anode);
         r = or_cclass(cc, acc, env->enc);
 
@@ -4663,9 +4712,9 @@ parse_enclose(Node** np, OnigToken* tok, int term, UChar** src, UChar* end,
             r = parse_subexp(&target, tok, term, &p, end, env);
             env->option = prev;
             if (r < 0) {
-	      onig_node_free(target);
-	      return r;
-	    }
+              onig_node_free(target);
+              return r;
+            }
             *np = node_new_option(option);
             CHECK_NULL_RETURN_MEMERR(*np);
             NENCLOSE(*np)->target = target;
@@ -5291,8 +5340,8 @@ parse_branch(Node** top, OnigToken* tok, int term,
     while (r != TK_EOT && r != term && r != TK_ALT) {
       r = parse_exp(&node, tok, term, src, end, env);
       if (r < 0) {
-	onig_node_free(node);
-	return r;
+        onig_node_free(node);
+        return r;
       }
 
       if (NTYPE(node) == NT_LIST) {
diff --git a/src/regsyntax.c b/src/regsyntax.c
index ade5b55..e751e24 100644
--- a/src/regsyntax.c
+++ b/src/regsyntax.c
@@ -168,7 +168,8 @@ OnigSyntaxType OnigSyntaxJava = {
 OnigSyntaxType OnigSyntaxPerl = {
   (( SYN_GNU_REGEX_OP | ONIG_SYN_OP_QMARK_NON_GREEDY |
      ONIG_SYN_OP_ESC_OCTAL3 | ONIG_SYN_OP_ESC_X_HEX2 |
-     ONIG_SYN_OP_ESC_X_BRACE_HEX8 | ONIG_SYN_OP_ESC_CONTROL_CHARS |
+     ONIG_SYN_OP_ESC_X_BRACE_HEX8 | ONIG_SYN_OP_ESC_O_BRACE_OCTAL |
+     ONIG_SYN_OP_ESC_CONTROL_CHARS |
      ONIG_SYN_OP_ESC_C_CONTROL )
    & ~ONIG_SYN_OP_ESC_LTGT_WORD_BEGIN_END )
   , ( ONIG_SYN_OP2_ESC_CAPITAL_Q_QUOTE |
@@ -192,7 +193,8 @@ OnigSyntaxType OnigSyntaxPerl = {
 OnigSyntaxType OnigSyntaxPerl_NG = {
   (( SYN_GNU_REGEX_OP | ONIG_SYN_OP_QMARK_NON_GREEDY |
      ONIG_SYN_OP_ESC_OCTAL3 | ONIG_SYN_OP_ESC_X_HEX2 |
-     ONIG_SYN_OP_ESC_X_BRACE_HEX8 | ONIG_SYN_OP_ESC_CONTROL_CHARS |
+     ONIG_SYN_OP_ESC_X_BRACE_HEX8 | ONIG_SYN_OP_ESC_O_BRACE_OCTAL |
+     ONIG_SYN_OP_ESC_CONTROL_CHARS |
      ONIG_SYN_OP_ESC_C_CONTROL )
    & ~ONIG_SYN_OP_ESC_LTGT_WORD_BEGIN_END )
   , ( ONIG_SYN_OP2_ESC_CAPITAL_Q_QUOTE |
diff --git a/src/unicode_fold1_key.c b/src/unicode_fold1_key.c
index 6b390fc..2151211 100644
--- a/src/unicode_fold1_key.c
+++ b/src/unicode_fold1_key.c
@@ -1,7 +1,7 @@
 /* This file was converted by gperf_fold_key_conv.py
       from gperf output file. */
-/* ANSI-C code produced by gperf version 3.0.3 */
-/* Command-line: /Library/Developer/CommandLineTools/usr/bin/gperf -n -C -T -c -t -j1 -L ANSI-C -F,-1 -N unicode_fold1_key unicode_fold1_key.gperf  */
+/* ANSI-C code produced by gperf version 3.0.4 */
+/* Command-line: gperf -n -C -T -c -t -j1 -L ANSI-C -F,-1 -N unicode_fold1_key unicode_fold1_key.gperf  */
 /* Computed positions: -k'1-3' */
 
 
@@ -60,6 +60,12 @@ hash(OnigCodePoint codes[])
   return asso_values[(unsigned char)onig_codes_byte_at(codes, 2)+3] + asso_values[(unsigned char)onig_codes_byte_at(codes, 1)] + asso_values[(unsigned char)onig_codes_byte_at(codes, 0)];
 }
 
+#ifdef __GNUC__
+__inline
+#if defined __GNUC_STDC_INLINE__ || defined __GNUC_GNU_INLINE__
+__attribute__ ((__gnu_inline__))
+#endif
+#endif
 int
 unicode_fold1_key(OnigCodePoint codes[])
 {
@@ -2534,7 +2540,7 @@ unicode_fold1_key(OnigCodePoint codes[])
     {
       int key = hash(codes);
 
-      if (key <= MAX_HASH_VALUE)
+      if (key <= MAX_HASH_VALUE && key >= 0)
         {
           int index = wordlist[key];
 
diff --git a/src/unicode_fold2_key.c b/src/unicode_fold2_key.c
index 74e9876..07cfa4e 100644
--- a/src/unicode_fold2_key.c
+++ b/src/unicode_fold2_key.c
@@ -1,7 +1,7 @@
 /* This file was converted by gperf_fold_key_conv.py
       from gperf output file. */
-/* ANSI-C code produced by gperf version 3.0.3 */
-/* Command-line: /Library/Developer/CommandLineTools/usr/bin/gperf -n -C -T -c -t -j1 -L ANSI-C -F,-1 -N unicode_fold2_key unicode_fold2_key.gperf  */
+/* ANSI-C code produced by gperf version 3.0.4 */
+/* Command-line: gperf -n -C -T -c -t -j1 -L ANSI-C -F,-1 -N unicode_fold2_key unicode_fold2_key.gperf  */
 /* Computed positions: -k'3,6' */
 
 
@@ -60,6 +60,12 @@ hash(OnigCodePoint codes[])
   return asso_values[(unsigned char)onig_codes_byte_at(codes, 5)] + asso_values[(unsigned char)onig_codes_byte_at(codes, 2)];
 }
 
+#ifdef __GNUC__
+__inline
+#if defined __GNUC_STDC_INLINE__ || defined __GNUC_GNU_INLINE__
+__attribute__ ((__gnu_inline__))
+#endif
+#endif
 int
 unicode_fold2_key(OnigCodePoint codes[])
 {
@@ -189,7 +195,7 @@ unicode_fold2_key(OnigCodePoint codes[])
     {
       int key = hash(codes);
 
-      if (key <= MAX_HASH_VALUE)
+      if (key <= MAX_HASH_VALUE && key >= 0)
         {
           int index = wordlist[key];
 
diff --git a/src/unicode_fold3_key.c b/src/unicode_fold3_key.c
index 8095b1c..1b4d9d4 100644
--- a/src/unicode_fold3_key.c
+++ b/src/unicode_fold3_key.c
@@ -1,7 +1,7 @@
 /* This file was converted by gperf_fold_key_conv.py
       from gperf output file. */
-/* ANSI-C code produced by gperf version 3.0.3 */
-/* Command-line: /Library/Developer/CommandLineTools/usr/bin/gperf -n -C -T -c -t -j1 -L ANSI-C -F,-1 -N unicode_fold3_key unicode_fold3_key.gperf  */
+/* ANSI-C code produced by gperf version 3.0.4 */
+/* Command-line: gperf -n -C -T -c -t -j1 -L ANSI-C -F,-1 -N unicode_fold3_key unicode_fold3_key.gperf  */
 /* Computed positions: -k'3,6,9' */
 
 
@@ -60,6 +60,12 @@ hash(OnigCodePoint codes[])
   return asso_values[(unsigned char)onig_codes_byte_at(codes, 8)] + asso_values[(unsigned char)onig_codes_byte_at(codes, 5)] + asso_values[(unsigned char)onig_codes_byte_at(codes, 2)];
 }
 
+#ifdef __GNUC__
+__inline
+#if defined __GNUC_STDC_INLINE__ || defined __GNUC_GNU_INLINE__
+__attribute__ ((__gnu_inline__))
+#endif
+#endif
 int
 unicode_fold3_key(OnigCodePoint codes[])
 {
@@ -99,7 +105,7 @@ unicode_fold3_key(OnigCodePoint codes[])
     {
       int key = hash(codes);
 
-      if (key <= MAX_HASH_VALUE)
+      if (key <= MAX_HASH_VALUE && key >= 0)
         {
           int index = wordlist[key];
 
diff --git a/src/unicode_unfold_key.c b/src/unicode_unfold_key.c
index c6261d2..15302ca 100644
--- a/src/unicode_unfold_key.c
+++ b/src/unicode_unfold_key.c
@@ -1,7 +1,7 @@
 /* This file was converted by gperf_unfold_key_conv.py
       from gperf output file. */
-/* ANSI-C code produced by gperf version 3.0.3 */
-/* Command-line: /Library/Developer/CommandLineTools/usr/bin/gperf -n -C -T -c -t -j1 -L ANSI-C -F,-1,0 -N unicode_unfold_key unicode_unfold_key.gperf  */
+/* ANSI-C code produced by gperf version 3.0.4 */
+/* Command-line: gperf -n -C -T -c -t -j1 -L ANSI-C -F,-1,0 -N unicode_unfold_key unicode_unfold_key.gperf  */
 /* Computed positions: -k'1-3' */
 
 
@@ -64,6 +64,12 @@ hash(OnigCodePoint codes[])
   return asso_values[(unsigned char)onig_codes_byte_at(codes, 2)+35] + asso_values[(unsigned char)onig_codes_byte_at(codes, 1)+1] + asso_values[(unsigned char)onig_codes_byte_at(codes, 0)];
 }
 
+#ifdef __GNUC__
+__inline
+#if defined __GNUC_STDC_INLINE__ || defined __GNUC_GNU_INLINE__
+__attribute__ ((__gnu_inline__))
+#endif
+#endif
 const struct ByUnfoldKey *
 unicode_unfold_key(OnigCodePoint code)
 {
@@ -2840,11 +2846,11 @@ unicode_unfold_key(OnigCodePoint code)
     {
       int key = hash(&code);
 
-      if (key <= MAX_HASH_VALUE)
+      if (key <= MAX_HASH_VALUE && key >= 0)
         {
           OnigCodePoint gcode = wordlist[key].code;
 
-          if (code == gcode)
+          if (code == gcode && wordlist[key].index >= 0)
             return &wordlist[key];
         }
     }
diff --git a/test/testc.c b/test/testc.c
index fbad340..ddf9fd5 100644
--- a/test/testc.c
+++ b/test/testc.c
@@ -585,6 +585,7 @@ extern int main(int argc, char* argv[])
   x2("[0-9-a]", "-", 0, 1);   // PR#44
   n("[0-9-a]", ":");          // PR#44
   x3("(\\(((?:[^(]|\\g<1>)*)\\))", "(abc)(abc)", 1, 4, 2); // PR#43
+  x2("\\o{101}", "A", 0, 1);
 
   x2("", "��", 0, 0);
   x2("��", "��", 0, 2);
diff --git a/test/testu.c b/test/testu.c
index 70284fb..017ebef 100644
--- a/test/testu.c
+++ b/test/testu.c
@@ -903,6 +903,9 @@ extern int main(int argc, char* argv[])
   x2("\000a\000<\000b\000>0\3200\3740\2700\3470\3630n0\3000\2460\3630\3550\3740\311\000<\000\134\000/\000b\000>\000\000", "\000a\000<\000b\000>0\3200\3740\2700\3470\3630n0\3000\2460\3630\3550\3740\311\000<\000/\000b\000>\000\000", 0, 40);
   x2("\000.\000<\000b\000>0\3200\3740\2700\3470\3630n0\3000\2460\3630\3550\3740\311\000<\000\134\000/\000b\000>\000\000", "\000a\000<\000b\000>0\3200\3740\2700\3470\3630n0\3000\2460\3630\3550\3740\311\000<\000/\000b\000>\000\000", 0, 40);
   x2("\000^\000\\\000p\000{\000K\000a\000t\000a\000k\000a\000n\000a\000}\000$\000\000", "\060\277\000\000", 0, 2);
+  x2("\000\\\000o\000{\0001\0000\0001\000}\000\000", "\000A\000\000", 0, 2);
+  x2("\000\\\000o\000{\0001\0001\0000\0007\0002\0001\000}\000\000", "\221\321\000\000", 0, 2);
+
   fprintf(stdout,
        "\nRESULT   SUCC: %d,  FAIL: %d,  ERROR: %d      (by Oniguruma %s)\n",
        nsucc, nfail, nerror, onig_version());