bugfix

File.cpp

@@ -77,6 +77,7 @@ const Tag& File::get() const { return _ret; }
 
 // _____________________________________________________________________________
 bool File::next() {
+  if (!_s.tagStack.size()) return false;
   // avoid too much stack copying
   if (_prevs.tagStack.size() != _s.tagStack.size() ||
       _prevs.tagStack.top() != _s.tagStack.top()) {
@@ -311,11 +312,13 @@ bool File::next() {
     _c = _buffer[_which] + off;
   }
 
-  if (_s.tagStack.top() != "[root]") {
-    // TODO error
-    throw XmlFileException("XML tree not complete");
-  } else {
-    _s.tagStack.pop();
+  if (_s.tagStack.size()) {
+    if (_s.tagStack.top() != "[root]") {
+      // TODO error
+      throw XmlFileException("XML tree not complete");
+    } else {
+      _s.tagStack.pop();
+    }
   }
   _s.s = NONE;
   _ret.name = "[root]";