Exception makes IDE unresponsive

[lallafa]

With Version 1.5 i can't open some templates without makeing the IDE unresponsive. The message.log is full with this exeption:

SEVERE [global]
java.lang.IllegalStateException: Lexer org.netbeans.freemarker.lexer.FTLLexer@620a8fa8
  returned null token but lexerInput.readLength()=13
  lexer-state: null
  tokenStartOffset=717, readOffset=730, lookaheadOffset=731
  Chars: "/#list][#t]\n\n" - these characters need to be tokenized.
Fix the lexer to not return null token in this state.
    at org.netbeans.lib.lexer.LexerInputOperation.checkLexerInputFinished(LexerInputOperation.java:457)
    at org.netbeans.lib.lexer.LexerInputOperation.nextToken(LexerInputOperation.java:217)
    at org.netbeans.lib.lexer.inc.IncTokenList.tokenOrEmbeddingImpl(IncTokenList.java:195)
    at org.netbeans.lib.lexer.inc.IncTokenList.tokenOrEmbedding(IncTokenList.java:190)
    at org.netbeans.api.lexer.TokenSequence.moveNext(TokenSequence.java:488)
    at org.netbeans.modules.editor.lib2.highlighting.SyntaxHighlighting$TSInfo.moveNextToken(SyntaxHighlighting.java:771)
    at org.netbeans.modules.editor.lib2.highlighting.SyntaxHighlighting$HSImpl.moveTheSequence(SyntaxHighlighting.java:478)
    at org.netbeans.modules.editor.lib2.highlighting.SyntaxHighlighting$HSImpl.moveNext(SyntaxHighlighting.java:427)
    at org.netbeans.modules.editor.lib2.highlighting.DirectMergeContainer$Wrapper.fetchNextHighlight(DirectMergeContainer.java:453)
    at org.netbeans.modules.editor.lib2.highlighting.DirectMergeContainer$HlSequence.updateMergeVars(DirectMergeContainer.java:305)
    at org.netbeans.modules.editor.lib2.highlighting.DirectMergeContainer$HlSequence.nextMerge(DirectMergeContainer.java:277)
    at org.netbeans.modules.editor.lib2.highlighting.DirectMergeContainer$HlSequence.moveNext(DirectMergeContainer.java:224)
    at org.netbeans.modules.editor.lib2.highlighting.HighlightsReader.readUntil(HighlightsReader.java:77)
    at org.netbeans.modules.editor.lib2.view.HighlightsViewFactory.restart(HighlightsViewFactory.java:191)
    at org.netbeans.modules.editor.lib2.view.ViewBuilder$FactoryState.init(ViewBuilder.java:1324)
    at org.netbeans.modules.editor.lib2.view.ViewBuilder.createViews(ViewBuilder.java:724)
    at org.netbeans.modules.editor.lib2.view.ViewBuilder.createReplaceRepaintViews(ViewBuilder.java:685)
    at org.netbeans.modules.editor.lib2.view.ViewUpdates.reinitAllViews(ViewUpdates.java:214)
    at org.netbeans.modules.editor.lib2.view.DocumentViewOp.checkViewsInited(DocumentViewOp.java:640)
    at org.netbeans.modules.editor.lib2.view.DocumentView.getPreferredSpan(DocumentView.java:251)
    at javax.swing.plaf.basic.BasicTextUI$RootView.getPreferredSpan(BasicTextUI.java:1353)
    at javax.swing.plaf.basic.BasicTextUI.getPreferredSize(BasicTextUI.java:919)
    at javax.swing.JComponent.getPreferredSize(JComponent.java:1662)
    at javax.swing.JEditorPane.getPreferredSize(JEditorPane.java:1332)
    at javax.swing.ScrollPaneLayout.layoutContainer(ScrollPaneLayout.java:791)
    at java.awt.Container.layout(Container.java:1510)
    at java.awt.Container.doLayout(Container.java:1499)
    at java.awt.Container.validateTree(Container.java:1695)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validate(Container.java:1630)
    at org.netbeans.core.windows.view.ui.DesktopImpl$LayeredLayout.layoutContainer(DesktopImpl.java:554)
    at java.awt.Container.layout(Container.java:1510)
    at java.awt.Container.doLayout(Container.java:1499)
    at java.awt.Container.validateTree(Container.java:1695)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validateTree(Container.java:1704)
    at java.awt.Container.validate(Container.java:1630)
    at javax.swing.RepaintManager$3.run(RepaintManager.java:711)
    at javax.swing.RepaintManager$3.run(RepaintManager.java:709)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at javax.swing.RepaintManager.validateInvalidComponents(RepaintManager.java:708)
    at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1731)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
    at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
[catch] at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
SEVERE [null]: Last record repeated more than 10 times, further logs of this record are ignored until the log record changes.
SEVERE [null]: Last record repeated 16810 times in total.

[rostanek]

Please attach your template file, so I can debug it.

[lallafa]

_partnerList.txt

[rostanek]

The problem was new directives introduced in FreeMarker 2.3.23 (#items and #sep). I forgot to handle them properly, but I fixed that in version 1.6, which is available at Netbeans plugin portal.