diff --git a/change_log.txt b/change_log.txt
index 46b3eecf..e5a31f96 100644
--- a/change_log.txt
+++ b/change_log.txt
@@ -1,4 +1,7 @@
  ===== 3.1.25-dev===== (xx.xx.2015)
+ 11.06.2015
+  - bugfix the lexer could hang on very large quoted strings (forum topic 25570)
+  
  08.06.2015
   - bugfix using {$foo} as array index like $bar.{$foo} or in double quoted string like "some {$foo} thing" failed https://github.com/smarty-php/smarty/issues/49
 
diff --git a/libs/Smarty.class.php b/libs/Smarty.class.php
index dcf3e2ca..57410a69 100644
--- a/libs/Smarty.class.php
+++ b/libs/Smarty.class.php
@@ -111,7 +111,7 @@ class Smarty extends Smarty_Internal_TemplateBase
     /**
      * smarty version
      */
-    const SMARTY_VERSION = '3.1.25-dev/4';
+    const SMARTY_VERSION = '3.1.25-dev/5';
 
     /**
      * define variable scopes
diff --git a/libs/sysplugins/smarty_internal_configfilelexer.php b/libs/sysplugins/smarty_internal_configfilelexer.php
index e5d4770b..e62728c2 100644
--- a/libs/sysplugins/smarty_internal_configfilelexer.php
+++ b/libs/sysplugins/smarty_internal_configfilelexer.php
@@ -21,7 +21,6 @@
  */
 class Smarty_Internal_Configfilelexer
 {
-
     /**
      * Source
      *
@@ -104,7 +103,8 @@ class Smarty_Internal_Configfilelexer
      *
      * @var array
      */
-    public $state_name = array(1 => 'START', 2 => 'VALUE', 3 => 'NAKED_STRING_VALUE', 4 => 'COMMENT', 5 => 'SECTION', 6 => 'TRIPPLE');
+    public $state_name = array(1 => 'START', 2 => 'VALUE', 3 => 'NAKED_STRING_VALUE', 4 => 'COMMENT', 5 => 'SECTION',
+                               6 => 'TRIPPLE');
 
     /**
      * storage for assembled token patterns
@@ -210,7 +210,7 @@ class Smarty_Internal_Configfilelexer
     public function yylex1()
     {
         if (!isset($this->yy_global_pattern1)) {
-            $this->yy_global_pattern1 = "/\G(#|;)|\G(\\[)|\G(\\])|\G(=)|\G([ \t\r]+)|\G(\n)|\G([0-9]*[a-zA-Z_]\\w*)|\G([\S\s])/iS";
+            $this->yy_global_pattern1 = "/\G(#|;)|\G(\\[)|\G(\\])|\G(=)|\G([ \t\r]+)|\G(\n)|\G([0-9]*[a-zA-Z_]\\w*)|\G([\S\s])/isS";
         }
         if ($this->counter >= strlen($this->data)) {
             return false; // end of input
@@ -219,7 +219,11 @@ class Smarty_Internal_Configfilelexer
         do {
             if (preg_match($this->yy_global_pattern1, $this->data, $yymatches, null, $this->counter)) {
                 $yysubmatches = $yymatches;
-                $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                if (strlen($yysubmatches[0]) < 200) {
+                    $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                } else {
+                    $yymatches = array_filter($yymatches, 'strlen');
+                }
                 if (empty($yymatches)) {
                     throw new Exception('Error: lexing failed because a rule matched' . ' an empty string.  Input "' . substr($this->data, $this->counter, 5) . '... state START');
                 }
@@ -308,7 +312,7 @@ class Smarty_Internal_Configfilelexer
     public function yylex2()
     {
         if (!isset($this->yy_global_pattern2)) {
-            $this->yy_global_pattern2 = "/\G([ \t\r]+)|\G(\\d+\\.\\d+(?=[ \t\r]*[\n#;]))|\G(\\d+(?=[ \t\r]*[\n#;]))|\G(\"\"\")|\G('[^'\\\\]*(?:\\\\.[^'\\\\]*)*'(?=[ \t\r]*[\n#;]))|\G(\"[^\"\\\\]*(?:\\\\.[^\"\\\\]*)*\"(?=[ \t\r]*[\n#;]))|\G([a-zA-Z]+(?=[ \t\r]*[\n#;]))|\G([^\n]+?(?=[ \t\r]*\n))|\G(\n)/iS";
+            $this->yy_global_pattern2 = "/\G([ \t\r]+)|\G(\\d+\\.\\d+(?=[ \t\r]*[\n#;]))|\G(\\d+(?=[ \t\r]*[\n#;]))|\G(\"\"\")|\G('[^'\\\\]*(?:\\\\.[^'\\\\]*)*'(?=[ \t\r]*[\n#;]))|\G(\"[^\"\\\\]*(?:\\\\.[^\"\\\\]*)*\"(?=[ \t\r]*[\n#;]))|\G([a-zA-Z]+(?=[ \t\r]*[\n#;]))|\G([^\n]+?(?=[ \t\r]*\n))|\G(\n)/isS";
         }
         if ($this->counter >= strlen($this->data)) {
             return false; // end of input
@@ -317,7 +321,11 @@ class Smarty_Internal_Configfilelexer
         do {
             if (preg_match($this->yy_global_pattern2, $this->data, $yymatches, null, $this->counter)) {
                 $yysubmatches = $yymatches;
-                $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                if (strlen($yysubmatches[0]) < 200) {
+                    $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                } else {
+                    $yymatches = array_filter($yymatches, 'strlen');
+                }
                 if (empty($yymatches)) {
                     throw new Exception('Error: lexing failed because a rule matched' . ' an empty string.  Input "' . substr($this->data, $this->counter, 5) . '... state VALUE');
                 }
@@ -396,7 +404,9 @@ class Smarty_Internal_Configfilelexer
     function yy_r2_7()
     {
 
-        if (!$this->configBooleanize || !in_array(strtolower($this->value), Array("true", "false", "on", "off", "yes", "no"))) {
+        if (!$this->configBooleanize || !in_array(strtolower($this->value), Array("true", "false", "on", "off", "yes",
+                "no"))
+        ) {
             $this->yypopstate();
             $this->yypushstate(self::NAKED_STRING_VALUE);
             return true; //reprocess in new state
@@ -424,7 +434,7 @@ class Smarty_Internal_Configfilelexer
     public function yylex3()
     {
         if (!isset($this->yy_global_pattern3)) {
-            $this->yy_global_pattern3 = "/\G([^\n]+?(?=[ \t\r]*\n))/iS";
+            $this->yy_global_pattern3 = "/\G([^\n]+?(?=[ \t\r]*\n))/isS";
         }
         if ($this->counter >= strlen($this->data)) {
             return false; // end of input
@@ -433,7 +443,11 @@ class Smarty_Internal_Configfilelexer
         do {
             if (preg_match($this->yy_global_pattern3, $this->data, $yymatches, null, $this->counter)) {
                 $yysubmatches = $yymatches;
-                $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                if (strlen($yysubmatches[0]) < 200) {
+                    $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                } else {
+                    $yymatches = array_filter($yymatches, 'strlen');
+                }
                 if (empty($yymatches)) {
                     throw new Exception('Error: lexing failed because a rule matched' . ' an empty string.  Input "' . substr($this->data, $this->counter, 5) . '... state NAKED_STRING_VALUE');
                 }
@@ -478,7 +492,7 @@ class Smarty_Internal_Configfilelexer
     public function yylex4()
     {
         if (!isset($this->yy_global_pattern4)) {
-            $this->yy_global_pattern4 = "/\G([ \t\r]+)|\G([^\n]+?(?=[ \t\r]*\n))|\G(\n)/iS";
+            $this->yy_global_pattern4 = "/\G([ \t\r]+)|\G([^\n]+?(?=[ \t\r]*\n))|\G(\n)/isS";
         }
         if ($this->counter >= strlen($this->data)) {
             return false; // end of input
@@ -487,7 +501,11 @@ class Smarty_Internal_Configfilelexer
         do {
             if (preg_match($this->yy_global_pattern4, $this->data, $yymatches, null, $this->counter)) {
                 $yysubmatches = $yymatches;
-                $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                if (strlen($yysubmatches[0]) < 200) {
+                    $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                } else {
+                    $yymatches = array_filter($yymatches, 'strlen');
+                }
                 if (empty($yymatches)) {
                     throw new Exception('Error: lexing failed because a rule matched' . ' an empty string.  Input "' . substr($this->data, $this->counter, 5) . '... state COMMENT');
                 }
@@ -544,7 +562,7 @@ class Smarty_Internal_Configfilelexer
     public function yylex5()
     {
         if (!isset($this->yy_global_pattern5)) {
-            $this->yy_global_pattern5 = "/\G(\\.)|\G(.*?(?=[\.=[\]\r\n]))/iS";
+            $this->yy_global_pattern5 = "/\G(\\.)|\G(.*?(?=[\.=[\]\r\n]))/isS";
         }
         if ($this->counter >= strlen($this->data)) {
             return false; // end of input
@@ -553,7 +571,11 @@ class Smarty_Internal_Configfilelexer
         do {
             if (preg_match($this->yy_global_pattern5, $this->data, $yymatches, null, $this->counter)) {
                 $yysubmatches = $yymatches;
-                $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                if (strlen($yysubmatches[0]) < 200) {
+                    $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                } else {
+                    $yymatches = array_filter($yymatches, 'strlen');
+                }
                 if (empty($yymatches)) {
                     throw new Exception('Error: lexing failed because a rule matched' . ' an empty string.  Input "' . substr($this->data, $this->counter, 5) . '... state SECTION');
                 }
@@ -604,7 +626,7 @@ class Smarty_Internal_Configfilelexer
     public function yylex6()
     {
         if (!isset($this->yy_global_pattern6)) {
-            $this->yy_global_pattern6 = "/\G(\"\"\"(?=[ \t\r]*[\n#;]))|\G([\S\s])/iS";
+            $this->yy_global_pattern6 = "/\G(\"\"\"(?=[ \t\r]*[\n#;]))|\G([\S\s])/isS";
         }
         if ($this->counter >= strlen($this->data)) {
             return false; // end of input
@@ -613,7 +635,11 @@ class Smarty_Internal_Configfilelexer
         do {
             if (preg_match($this->yy_global_pattern6, $this->data, $yymatches, null, $this->counter)) {
                 $yysubmatches = $yymatches;
-                $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                if (strlen($yysubmatches[0]) < 200) {
+                    $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                } else {
+                    $yymatches = array_filter($yymatches, 'strlen');
+                }
                 if (empty($yymatches)) {
                     throw new Exception('Error: lexing failed because a rule matched' . ' an empty string.  Input "' . substr($this->data, $this->counter, 5) . '... state TRIPPLE');
                 }
@@ -669,4 +695,5 @@ class Smarty_Internal_Configfilelexer
         $this->value = substr($this->data, $this->counter, $to - $this->counter);
         $this->token = Smarty_Internal_Configfileparser::TPC_TRIPPLE_TEXT;
     }
+
 }
diff --git a/libs/sysplugins/smarty_internal_configfileparser.php b/libs/sysplugins/smarty_internal_configfileparser.php
index 51e4a9bb..69aaf990 100644
--- a/libs/sysplugins/smarty_internal_configfileparser.php
+++ b/libs/sysplugins/smarty_internal_configfileparser.php
@@ -2,7 +2,6 @@
 
 class TPC_yyToken implements ArrayAccess
 {
-
     public $string = '';
 
     public $metadata = array();
@@ -68,7 +67,6 @@ class TPC_yyToken implements ArrayAccess
 
 class TPC_yyStackEntry
 {
-
     public $stateno;       /* The state-number */
     public $major;         /* The major token value.  This is the code
                      ** number for the token at this stack level */
@@ -357,15 +355,18 @@ class Smarty_Internal_Configfileparser
 
     const YY_SZ_ACTTAB = 38;
 
-    static public $yy_action = array(29, 30, 34, 33, 24, 13, 19, 25, 35, 21, 59, 8, 3, 1, 20, 12, 14, 31, 20, 12, 15, 17, 23, 18, 27, 26, 4, 5, 6, 32, 2, 11, 28, 22, 16, 9, 7, 10,);
+    static public $yy_action = array(29, 30, 34, 33, 24, 13, 19, 25, 35, 21, 59, 8, 3, 1, 20, 12, 14, 31, 20, 12, 15,
+        17, 23, 18, 27, 26, 4, 5, 6, 32, 2, 11, 28, 22, 16, 9, 7, 10,);
 
-    static public $yy_lookahead = array(7, 8, 9, 10, 11, 12, 5, 27, 15, 16, 20, 21, 23, 23, 17, 18, 13, 14, 17, 18, 15, 2, 17, 4, 25, 26, 6, 3, 3, 14, 23, 1, 24, 17, 2, 25, 22, 25,);
+    static public $yy_lookahead = array(7, 8, 9, 10, 11, 12, 5, 27, 15, 16, 20, 21, 23, 23, 17, 18, 13, 14, 17, 18, 15,
+        2, 17, 4, 25, 26, 6, 3, 3, 14, 23, 1, 24, 17, 2, 25, 22, 25,);
 
     const YY_SHIFT_USE_DFLT = - 8;
 
     const YY_SHIFT_MAX = 19;
 
-    static public $yy_shift_ofst = array(- 8, 1, 1, 1, - 7, - 3, - 3, 30, - 8, - 8, - 8, 19, 5, 3, 15, 16, 24, 25, 32, 20,);
+    static public $yy_shift_ofst = array(- 8, 1, 1, 1, - 7, - 3, - 3, 30, - 8, - 8, - 8, 19, 5, 3, 15, 16, 24, 25, 32,
+        20,);
 
     const YY_REDUCE_USE_DFLT = - 21;
 
@@ -373,9 +374,14 @@ class Smarty_Internal_Configfileparser
 
     static public $yy_reduce_ofst = array(- 10, - 1, - 1, - 1, - 20, 10, 12, 8, 14, 7, - 11,);
 
-    static public $yyExpectedTokens = array(array(), array(5, 17, 18,), array(5, 17, 18,), array(5, 17, 18,), array(7, 8, 9, 10, 11, 12, 15, 16,), array(17, 18,), array(17, 18,), array(1,), array(), array(), array(), array(2, 4,), array(15, 17,), array(13, 14,), array(14,), array(17,), array(3,), array(3,), array(2,), array(6,), array(), array(), array(), array(), array(), array(), array(), array(), array(), array(), array(), array(), array(), array(), array(), array(),);
+    static public $yyExpectedTokens = array(array(), array(5, 17, 18,), array(5, 17, 18,), array(5, 17, 18,),
+        array(7, 8, 9, 10, 11, 12, 15, 16,), array(17, 18,), array(17, 18,), array(1,), array(), array(), array(),
+        array(2, 4,), array(15, 17,), array(13, 14,), array(14,), array(17,), array(3,), array(3,), array(2,),
+        array(6,), array(), array(), array(), array(), array(), array(), array(), array(), array(), array(), array(),
+        array(), array(), array(), array(), array(),);
 
-    static public $yy_default = array(44, 37, 41, 40, 58, 58, 58, 36, 39, 44, 44, 58, 58, 58, 58, 58, 58, 58, 58, 58, 55, 54, 57, 56, 50, 45, 43, 42, 38, 46, 47, 52, 51, 49, 48, 53,);
+    static public $yy_default = array(44, 37, 41, 40, 58, 58, 58, 36, 39, 44, 44, 58, 58, 58, 58, 58, 58, 58, 58, 58,
+        55, 54, 57, 56, 50, 45, 43, 42, 38, 46, 47, 52, 51, 49, 48, 53,);
 
     const YYNOCODE = 29;
 
@@ -418,9 +424,19 @@ class Smarty_Internal_Configfileparser
     public $yyerrcnt;                 /* Shifts left before out of the error */
     public $yystack = array();  /* The parser's stack */
 
-    public $yyTokenName = array('$', 'OPENB', 'SECTION', 'CLOSEB', 'DOT', 'ID', 'EQUAL', 'FLOAT', 'INT', 'BOOL', 'SINGLE_QUOTED_STRING', 'DOUBLE_QUOTED_STRING', 'TRIPPLE_QUOTES', 'TRIPPLE_TEXT', 'TRIPPLE_QUOTES_END', 'NAKED_STRING', 'OTHER', 'NEWLINE', 'COMMENTSTART', 'error', 'start', 'global_vars', 'sections', 'var_list', 'section', 'newline', 'var', 'value',);
+    public $yyTokenName = array('$', 'OPENB', 'SECTION', 'CLOSEB', 'DOT', 'ID', 'EQUAL', 'FLOAT', 'INT', 'BOOL',
+        'SINGLE_QUOTED_STRING', 'DOUBLE_QUOTED_STRING', 'TRIPPLE_QUOTES', 'TRIPPLE_TEXT', 'TRIPPLE_QUOTES_END',
+        'NAKED_STRING', 'OTHER', 'NEWLINE', 'COMMENTSTART', 'error', 'start', 'global_vars', 'sections', 'var_list',
+        'section', 'newline', 'var', 'value',);
 
-    public static $yyRuleName = array('start ::= global_vars sections', 'global_vars ::= var_list', 'sections ::= sections section', 'sections ::=', 'section ::= OPENB SECTION CLOSEB newline var_list', 'section ::= OPENB DOT SECTION CLOSEB newline var_list', 'var_list ::= var_list newline', 'var_list ::= var_list var', 'var_list ::=', 'var ::= ID EQUAL value', 'value ::= FLOAT', 'value ::= INT', 'value ::= BOOL', 'value ::= SINGLE_QUOTED_STRING', 'value ::= DOUBLE_QUOTED_STRING', 'value ::= TRIPPLE_QUOTES TRIPPLE_TEXT TRIPPLE_QUOTES_END', 'value ::= TRIPPLE_QUOTES TRIPPLE_QUOTES_END', 'value ::= NAKED_STRING', 'value ::= OTHER', 'newline ::= NEWLINE', 'newline ::= COMMENTSTART NEWLINE', 'newline ::= COMMENTSTART NAKED_STRING NEWLINE',);
+    public static $yyRuleName = array('start ::= global_vars sections', 'global_vars ::= var_list',
+        'sections ::= sections section', 'sections ::=', 'section ::= OPENB SECTION CLOSEB newline var_list',
+        'section ::= OPENB DOT SECTION CLOSEB newline var_list', 'var_list ::= var_list newline',
+        'var_list ::= var_list var', 'var_list ::=', 'var ::= ID EQUAL value', 'value ::= FLOAT', 'value ::= INT',
+        'value ::= BOOL', 'value ::= SINGLE_QUOTED_STRING', 'value ::= DOUBLE_QUOTED_STRING',
+        'value ::= TRIPPLE_QUOTES TRIPPLE_TEXT TRIPPLE_QUOTES_END', 'value ::= TRIPPLE_QUOTES TRIPPLE_QUOTES_END',
+        'value ::= NAKED_STRING', 'value ::= OTHER', 'newline ::= NEWLINE', 'newline ::= COMMENTSTART NEWLINE',
+        'newline ::= COMMENTSTART NAKED_STRING NEWLINE',);
 
     public function tokenName($tokenType)
     {
@@ -722,9 +738,16 @@ class Smarty_Internal_Configfileparser
         }
     }
 
-    public static $yyRuleInfo = array(array(0 => 20, 1 => 2), array(0 => 21, 1 => 1), array(0 => 22, 1 => 2), array(0 => 22, 1 => 0), array(0 => 24, 1 => 5), array(0 => 24, 1 => 6), array(0 => 23, 1 => 2), array(0 => 23, 1 => 2), array(0 => 23, 1 => 0), array(0 => 26, 1 => 3), array(0 => 27, 1 => 1), array(0 => 27, 1 => 1), array(0 => 27, 1 => 1), array(0 => 27, 1 => 1), array(0 => 27, 1 => 1), array(0 => 27, 1 => 3), array(0 => 27, 1 => 2), array(0 => 27, 1 => 1), array(0 => 27, 1 => 1), array(0 => 25, 1 => 1), array(0 => 25, 1 => 2), array(0 => 25, 1 => 3),);
+    public static $yyRuleInfo = array(array(0 => 20, 1 => 2), array(0 => 21, 1 => 1), array(0 => 22, 1 => 2),
+        array(0 => 22, 1 => 0), array(0 => 24, 1 => 5), array(0 => 24, 1 => 6), array(0 => 23, 1 => 2),
+        array(0 => 23, 1 => 2), array(0 => 23, 1 => 0), array(0 => 26, 1 => 3), array(0 => 27, 1 => 1),
+        array(0 => 27, 1 => 1), array(0 => 27, 1 => 1), array(0 => 27, 1 => 1), array(0 => 27, 1 => 1),
+        array(0 => 27, 1 => 3), array(0 => 27, 1 => 2), array(0 => 27, 1 => 1), array(0 => 27, 1 => 1),
+        array(0 => 25, 1 => 1), array(0 => 25, 1 => 2), array(0 => 25, 1 => 3),);
 
-    public static $yyReduceMap = array(0 => 0, 2 => 0, 3 => 0, 19 => 0, 20 => 0, 21 => 0, 1 => 1, 4 => 4, 5 => 5, 6 => 6, 7 => 7, 8 => 8, 9 => 9, 10 => 10, 11 => 11, 12 => 12, 13 => 13, 14 => 14, 15 => 15, 16 => 16, 17 => 17, 18 => 17,);
+    public static $yyReduceMap = array(0  => 0, 2 => 0, 3 => 0, 19 => 0, 20 => 0, 21 => 0, 1 => 1, 4 => 4, 5 => 5,
+                                       6  => 6, 7 => 7, 8 => 8, 9 => 9, 10 => 10, 11 => 11, 12 => 12, 13 => 13,
+                                       14 => 14, 15 => 15, 16 => 16, 17 => 17, 18 => 17,);
 
     #line 261 "../smarty/lexer/smarty_internal_configfileparser.y"
     function yy_r0()
@@ -776,7 +799,8 @@ class Smarty_Internal_Configfileparser
     #line 307 "../smarty/lexer/smarty_internal_configfileparser.y"
     function yy_r9()
     {
-        $this->_retvalue = Array("key" => $this->yystack[$this->yyidx + - 2]->minor, "value" => $this->yystack[$this->yyidx + 0]->minor);
+        $this->_retvalue = Array("key"   => $this->yystack[$this->yyidx + - 2]->minor,
+                                 "value" => $this->yystack[$this->yyidx + 0]->minor);
     }
 
     #line 312 "../smarty/lexer/smarty_internal_configfileparser.y"
diff --git a/libs/sysplugins/smarty_internal_templatelexer.php b/libs/sysplugins/smarty_internal_templatelexer.php
index 9bb6b63e..abf81d08 100644
--- a/libs/sysplugins/smarty_internal_templatelexer.php
+++ b/libs/sysplugins/smarty_internal_templatelexer.php
@@ -286,7 +286,11 @@ class Smarty_Internal_Templatelexer
         do {
             if (preg_match($this->yy_global_pattern1, $this->data, $yymatches, null, $this->counter)) {
                 $yysubmatches = $yymatches;
-                $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                if (strlen($yysubmatches[0]) < 200) {
+                    $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                } else {
+                    $yymatches = array_filter($yymatches, 'strlen');
+                }
                 if (empty($yymatches)) {
                     throw new Exception('Error: lexing failed because a rule matched' . ' an empty string.  Input "' . substr($this->data, $this->counter, 5) . '... state TEXT');
                 }
@@ -399,7 +403,11 @@ class Smarty_Internal_Templatelexer
         do {
             if (preg_match($this->yy_global_pattern2, $this->data, $yymatches, null, $this->counter)) {
                 $yysubmatches = $yymatches;
-                $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                if (strlen($yysubmatches[0]) < 200) {
+                    $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                } else {
+                    $yymatches = array_filter($yymatches, 'strlen');
+                }
                 if (empty($yymatches)) {
                     throw new Exception('Error: lexing failed because a rule matched' . ' an empty string.  Input "' . substr($this->data, $this->counter, 5) . '... state TAG');
                 }
@@ -525,7 +533,11 @@ class Smarty_Internal_Templatelexer
         do {
             if (preg_match($this->yy_global_pattern3, $this->data, $yymatches, null, $this->counter)) {
                 $yysubmatches = $yymatches;
-                $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                if (strlen($yysubmatches[0]) < 200) {
+                    $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                } else {
+                    $yymatches = array_filter($yymatches, 'strlen');
+                }
                 if (empty($yymatches)) {
                     throw new Exception('Error: lexing failed because a rule matched' . ' an empty string.  Input "' . substr($this->data, $this->counter, 5) . '... state TAGBODY     ');
                 }
@@ -852,7 +864,11 @@ class Smarty_Internal_Templatelexer
         do {
             if (preg_match($this->yy_global_pattern4, $this->data, $yymatches, null, $this->counter)) {
                 $yysubmatches = $yymatches;
-                $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                if (strlen($yysubmatches[0]) < 200) {
+                    $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                } else {
+                    $yymatches = array_filter($yymatches, 'strlen');
+                }
                 if (empty($yymatches)) {
                     throw new Exception('Error: lexing failed because a rule matched' . ' an empty string.  Input "' . substr($this->data, $this->counter, 5) . '... state LITERAL');
                 }
@@ -932,7 +948,11 @@ class Smarty_Internal_Templatelexer
         do {
             if (preg_match($this->yy_global_pattern5, $this->data, $yymatches, null, $this->counter)) {
                 $yysubmatches = $yymatches;
-                $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                if (strlen($yysubmatches[0]) < 200) {
+                    $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                } else {
+                    $yymatches = array_filter($yymatches, 'strlen');
+                }
                 if (empty($yymatches)) {
                     throw new Exception('Error: lexing failed because a rule matched' . ' an empty string.  Input "' . substr($this->data, $this->counter, 5) . '... state DOUBLEQUOTEDSTRING');
                 }
@@ -1067,7 +1087,11 @@ class Smarty_Internal_Templatelexer
         do {
             if (preg_match($this->yy_global_pattern6, $this->data, $yymatches, null, $this->counter)) {
                 $yysubmatches = $yymatches;
-                $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                if (strlen($yysubmatches[0]) < 200) {
+                    $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                } else {
+                    $yymatches = array_filter($yymatches, 'strlen');
+                }
                 if (empty($yymatches)) {
                     throw new Exception('Error: lexing failed because a rule matched' . ' an empty string.  Input "' . substr($this->data, $this->counter, 5) . '... state CHILDBODY');
                 }
@@ -1157,7 +1181,11 @@ class Smarty_Internal_Templatelexer
         do {
             if (preg_match($this->yy_global_pattern7, $this->data, $yymatches, null, $this->counter)) {
                 $yysubmatches = $yymatches;
-                $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                if (strlen($yysubmatches[0]) < 200) {
+                    $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                } else {
+                    $yymatches = array_filter($yymatches, 'strlen');
+                }
                 if (empty($yymatches)) {
                     throw new Exception('Error: lexing failed because a rule matched' . ' an empty string.  Input "' . substr($this->data, $this->counter, 5) . '... state CHILDBLOCK');
                 }
@@ -1260,7 +1288,11 @@ class Smarty_Internal_Templatelexer
         do {
             if (preg_match($this->yy_global_pattern8, $this->data, $yymatches, null, $this->counter)) {
                 $yysubmatches = $yymatches;
-                $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                if (strlen($yysubmatches[0]) < 200) {
+                    $yymatches = preg_grep("/(.|\s)+/", $yysubmatches);
+                } else {
+                    $yymatches = array_filter($yymatches, 'strlen');
+                }
                 if (empty($yymatches)) {
                     throw new Exception('Error: lexing failed because a rule matched' . ' an empty string.  Input "' . substr($this->data, $this->counter, 5) . '... state CHILDLITERAL');
                 }