php-zend-multibyte-bug

c.php

<?php
declare(encoding='UTF-8');

/* あああ */

?>

console

$ out/php -v
PHP 5.7.0-dev (cli) (built: Jul 23 2014 16:43:49) (DEBUG)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.7.0-dev, Copyright (c) 1998-2014 Zend Technologies

$ out/php -d zend.multibyte=1 -d mbstring.internal_encoding=EUC_JP dev.php | od -c
0000000  \0  \0  \0
0000003

fix.patch

diff --git a/Zend/zend_language_scanner.c b/Zend/zend_language_scanner.c
index ae41cde..34c88a8 100644
--- a/Zend/zend_language_scanner.c
+++ b/Zend/zend_language_scanner.c
@@ -853,7 +853,7 @@ ZEND_API void zend_multibyte_yyinput_again(zend_encoding_filter old_input_filter
 	SCNG(yy_cursor) = new_yy_start + (SCNG(yy_cursor) - SCNG(yy_start));
 	SCNG(yy_marker) = new_yy_start + (SCNG(yy_marker) - SCNG(yy_start));
 	SCNG(yy_text) = new_yy_start + (SCNG(yy_text) - SCNG(yy_start));
-	SCNG(yy_limit) = new_yy_start + (SCNG(yy_limit) - SCNG(yy_start));
+	SCNG(yy_limit) = new_yy_start + (SCNG(yy_limit) - SCNG(yy_start)) + length - SCNG(script_org_size);
 
 	SCNG(yy_start) = new_yy_start;
 }
diff --git a/Zend/zend_language_scanner.l b/Zend/zend_language_scanner.l
index 4f50658..89c055f 100644
--- a/Zend/zend_language_scanner.l
+++ b/Zend/zend_language_scanner.l
@@ -851,7 +851,7 @@ ZEND_API void zend_multibyte_yyinput_again(zend_encoding_filter old_input_filter
 	SCNG(yy_cursor) = new_yy_start + (SCNG(yy_cursor) - SCNG(yy_start));
 	SCNG(yy_marker) = new_yy_start + (SCNG(yy_marker) - SCNG(yy_start));
 	SCNG(yy_text) = new_yy_start + (SCNG(yy_text) - SCNG(yy_start));
-	SCNG(yy_limit) = new_yy_start + (SCNG(yy_limit) - SCNG(yy_start));
+	SCNG(yy_limit) = new_yy_start + (SCNG(yy_limit) - SCNG(yy_start)) + length - SCNG(script_org_size);
 
 	SCNG(yy_start) = new_yy_start;
 }