java.util.ConcurrentModificationException: Caller uses obsolete token sequence which is no longer valid. Underlying token hierarchy has been modified: modCount=1225 != upToDateModCount=1226
Please report against caller's module which needs to be fixed (not the lexer module).
        at org.netbeans.api.lexer.TokenSequence.checkModCount(TokenSequence.java:757)
        at org.netbeans.api.lexer.TokenSequence.move(TokenSequence.java:571)
        at org.netbeans.modules.latex.model.command.impl.NodeImpl.getNodeTokens(NodeImpl.java:187)
        at org.netbeans.modules.latex.model.command.impl.NodeImpl.getText(NodeImpl.java:250)
        at org.netbeans.modules.latex.gui.nb.VauParserImpl.parseOptions(VauParserImpl.java:216)
        at org.netbeans.modules.latex.gui.nb.VauParserImpl.access$1400(VauParserImpl.java:83)
        at org.netbeans.modules.latex.gui.nb.VauParserImpl$VCurveCommandParser.parseCommand(VauParserImpl.java:629)
        at org.netbeans.modules.latex.gui.nb.VauParserImpl$VauTraverseHandler.commandStart(VauParserImpl.java:139)
        at org.netbeans.modules.latex.model.command.impl.CommandNodeImpl.traverse(CommandNodeImpl.java:107)
        at org.netbeans.modules.latex.model.command.impl.TextNodeImpl.traverseImpl(TextNodeImpl.java:92)
        at org.netbeans.modules.latex.model.command.impl.TextNodeImpl.traverse(TextNodeImpl.java:98)
        at org.netbeans.modules.latex.model.command.impl.TextNodeImpl.traverseImpl(TextNodeImpl.java:92)
        at org.netbeans.modules.latex.model.command.impl.TextNodeImpl.traverse(TextNodeImpl.java:98)
        at org.netbeans.modules.latex.model.command.impl.BlockNodeImpl.traverse(BlockNodeImpl.java:107)
        at org.netbeans.modules.latex.model.command.impl.TextNodeImpl.traverseImpl(TextNodeImpl.java:92)
        at org.netbeans.modules.latex.model.command.impl.ArgumentNodeImpl.traverse(ArgumentNodeImpl.java:100)
        at org.netbeans.modules.latex.model.command.impl.CommandNodeImpl.traverse(CommandNodeImpl.java:111)
        at org.netbeans.modules.latex.gui.nb.VauParserImpl.parsePicture(VauParserImpl.java:102)
        at org.netbeans.modules.latex.gui.nb.VauParserImpl.parse(VauParserImpl.java:94)
        at org.netbeans.modules.latex.gui.nb.VauStructuralElement.<init>(VauStructuralElement.java:95)
        at org.netbeans.modules.latex.gui.nb.VauParser.getElement(VauParser.java:75)
        at org.netbeans.modules.latex.model.structural.parser.StructuralParserImpl$ParsingTraverseHandler.handleNode(StructuralParserImpl.java:191)
        at org.netbeans.modules.latex.model.structural.parser.StructuralParserImpl$ParsingTraverseHandler.commandStart(StructuralParserImpl.java:222)
        at org.netbeans.modules.latex.model.command.impl.CommandNodeImpl.traverse(CommandNodeImpl.java:107)
        at org.netbeans.modules.latex.model.command.impl.TextNodeImpl.traverseImpl(TextNodeImpl.java:92)
        at org.netbeans.modules.latex.model.command.impl.TextNodeImpl.traverse(TextNodeImpl.java:98)
        at org.netbeans.modules.latex.model.command.impl.TextNodeImpl.traverseImpl(TextNodeImpl.java:92)
        at org.netbeans.modules.latex.model.command.impl.TextNodeImpl.traverse(TextNodeImpl.java:98)
        at org.netbeans.modules.latex.model.command.impl.BlockNodeImpl.traverse(BlockNodeImpl.java:107)
        at org.netbeans.modules.latex.model.command.impl.TextNodeImpl.traverseImpl(TextNodeImpl.java:92)
        at org.netbeans.modules.latex.model.command.impl.TextNodeImpl.traverse(TextNodeImpl.java:98)
        at org.netbeans.modules.latex.model.command.impl.NBDocumentNodeImpl.traverse(NBDocumentNodeImpl.java:122)
        at org.netbeans.modules.latex.model.structural.parser.StructuralParserImpl.parse(StructuralParserImpl.java:89)
        at org.netbeans.modules.latex.loop.LaTeXGSFParser.parseFiles(LaTeXGSFParser.java:116)
        at org.netbeans.napi.gsfret.source.Source.moveToPhase(Source.java:880)
        at org.netbeans.napi.gsfret.source.Source$CompilationJob.run(Source.java:1192)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)
An error occurred during parsing of '/usr/local/home/lahvac/school/texts/ideas/clanek-dca/dca.tex'. Please report a bug against ruby and attach dump file '/usr/local/home/lahvac/userdir.latex/var/log/dca_12.dump'.