Index: branches/RC/core/kernel/nparser/nparser.php
===================================================================
diff -u -r8929 -r8953
--- branches/RC/core/kernel/nparser/nparser.php	(.../nparser.php)	(revision 8929)
+++ branches/RC/core/kernel/nparser/nparser.php	(.../nparser.php)	(revision 8953)
@@ -52,7 +52,9 @@
 			// appending any text/html data found before tag
 			$this->Buffers[$this->Level] .= $tag_data[1][0];
 			if (!$this->InsideComment) {
-				$this->ProcessTag($tag);
+				if ($this->ProcessTag($tag) === false) {
+					return false;
+				}
 			}
 			else {
 				$this->Buffers[$this->Level] .= $tag_data[2][0].$tag_data[3][0].$tag_data[4][0];
@@ -61,6 +63,7 @@
 
 		if ($this->Level > 0) {
 			$this->Application->handleError(E_USER_ERROR, 'Unclosed tag opened by '.$this->TagInfo($this->Stack[$this->Level]->Tag), $this->Stack[$this->Level]->Tag['file'], $this->Stack[$this->Level]->Tag['line']);
+			return false;
 		}
 
 		// appending text data after last tag (after its closing pos),
@@ -73,6 +76,7 @@
 			trigger_error('Saving compiled template failed', E_USER_ERROR);
 		}
 		fclose($compiled);
+		return true;
 	}
 
 	function SplitParamsStr($params_str)
@@ -93,6 +97,7 @@
 		if (!preg_match('/([^_ \t\n]*)[_]?([^ \t\n]*)[ \t\n]*(.*)$$/s', $tag['tag'], $parts)) {
 			// this is virtually impossible, but just in case
 			$this->Application->handleError(E_USER_ERROR, 'Incorrect tag format: '.$tag['tag'], $tag['file'], $tag['line']);
+			return false;
 		}
 
 		$splited['prefix'] = $parts[2] ? $parts[1] : '__auto__';
@@ -103,7 +108,9 @@
 
 	function ProcessTag($tag)
 	{
-		$tag = array_merge($tag, $this->SplitTag($tag));
+		$splited = $this->SplitTag($tag);
+		if ($splited === false) return false;
+		$tag = array_merge($tag, $splited);
 		$tag['processed'] = false;
 		$tag['NP'] = $this->SplitParamsStr($tag['attrs']);
 
@@ -117,7 +124,9 @@
 				/* @var $instance _BlockTag */
 				$this->Stack[++$this->Level] =& $instance;
 				$this->Buffers[$this->Level] = '';
-				$o .= $instance->Open($tag);
+				$open_code = $instance->Open($tag);
+				if ($open_code === false) return false;
+				$o .= $open_code;
 			}
 
 			if ($tag['is_closing']) { // not ELSE here, because tag may be <empty/> and still has a handler-class
@@ -127,14 +136,16 @@
 						$dump[] = $instance->Tag;
 					}
 					print_pre($dump);
-					$this->Application->handleError(E_USER_ERROR, 'Closing tag without an opening: '.$this->TagInfo($tag).' <b> - probably opening tag was removed or nested tags error', $tag['file'], $tag['line']);
+					$this->Application->handleError(E_USER_ERROR, 'Closing tag without an opening: '.$this->TagInfo($tag).' <b> - probably opening tag was removed or nested tags error</b>', $tag['file'], $tag['line']);
+					return false;
 				}
 				if ($this->Stack[$this->Level]->Tag['name'] != $tag['name']) {
 					$opening_tag = $this->Stack[$this->Level]->Tag;
 					$this->Application->handleError(E_USER_ERROR,
 					    'Closing tag '.$this->TagInfo($tag).' does not match
 							 opening tag at current nesting level ('.$this->TagInfo($opening_tag).'
 							 opened at line '.$opening_tag['line'].')', $tag['file'], $tag['line']);
+					return false;
 				}
 				$o .= $this->Stack[$this->Level]->Close($tag); // DO NOT use $this->Level-- here because it's used inside Close
 				$this->Level--;
@@ -143,14 +154,18 @@
 		else { // regular tags - just compile
 			if (!$tag['is_closing']) {
 				$this->Application->handleError(E_USER_ERROR, 'Tag without a handler: '.$this->TagInfo($tag).' <b> - probably missing &lt;empty <span style="color: red">/</span>&gt; tag closing</b>', $tag['file'], $tag['line']);
+				return false;
 			}
 
 			if ($this->Level > 0) $o .= $this->Stack[$this->Level]->PassThrough($tag);
 			if (!$tag['processed']) {
-				$o .= '<?'.'php '.$this->CompileTag($tag)." ?>\n";
+				$compiled = $this->CompileTag($tag);
+				if ($compiled === false) return false;
+				$o .= '<?'.'php '.$compiled." ?>\n";
 			}
 		}
 		$this->Buffers[$this->Level] .= $o;
+		return true;
 	}
 
 	function TagInfo($tag, $with_params=false)
@@ -191,6 +206,7 @@
 			$p =& $this->GetProcessor($prefix);
 			if (!$p->CheckTag($tag['name'], $tag['prefix'])) {
 				$this->Application->handleError(E_USER_ERROR, 'Unknown tag: '.$this->TagInfo($tag).' <b> - incorrect tag name or prefix </b>', $tag['file'], $tag['line']);
+				return false;
 			}
 		}
 		return $code;
@@ -208,7 +224,7 @@
 		}
 		if (!$pre_parsed || !$pre_parsed['active'] || defined('DBG_NPARSER_FORCE_COMPILE') && DBG_NPARSER_FORCE_COMPILE) {
 			$inc_parser =& new NParser();
-			$inc_parser->Compile($pre_parsed);
+			if (!$inc_parser->Compile($pre_parsed)) return false;
 		}
 		return $pre_parsed;
 	}