ConcurrentModificationException

[stof]

I got an exception in the plugin when opening a service file (not sure whether it is related to the action of opening the file, but it happened at this time):

null
java.util.ConcurrentModificationException
    at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:859)
    at java.util.ArrayList$Itr.next(ArrayList.java:831)
    at fr.adrienbrault.idea.symfony2plugin.dic.TagReference.multiResolve(TagReference.java:41)
    at com.intellij.codeInsight.daemon.impl.analysis.XmlHighlightVisitor.hasBadResolve(XmlHighlightVisitor.java:663)
    at com.intellij.codeInsight.daemon.impl.analysis.XmlHighlightVisitor.a(XmlHighlightVisitor.java:591)
    at com.intellij.codeInsight.daemon.impl.analysis.XmlHighlightVisitor.a(XmlHighlightVisitor.java:583)
    at com.intellij.codeInsight.daemon.impl.analysis.XmlHighlightVisitor.visitXmlAttributeValue(XmlHighlightVisitor.java:556)
    at com.intellij.psi.impl.source.xml.XmlAttributeValueImpl.accept(XmlAttributeValueImpl.java:55)
    at com.intellij.codeInsight.daemon.impl.analysis.XmlHighlightVisitor.visit(XmlHighlightVisitor.java:736)
    at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass$5.run(GeneralHighlightingPass.java:296)
    at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.a(GeneralHighlightingPass.java:383)
    at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.access$300(GeneralHighlightingPass.java:61)
    at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass$6.run(GeneralHighlightingPass.java:389)
    at com.intellij.codeInsight.daemon.impl.DefaultHighlightVisitor.analyze(DefaultHighlightVisitor.java:87)
    at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.a(GeneralHighlightingPass.java:386)
    at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.access$300(GeneralHighlightingPass.java:61)
    at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass$6.run(GeneralHighlightingPass.java:389)
    at com.intellij.codeInsight.daemon.impl.analysis.XmlHighlightVisitor.analyze(XmlHighlightVisitor.java:746)
    at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.a(GeneralHighlightingPass.java:386)
    at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.a(GeneralHighlightingPass.java:374)
    at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.collectInformationWithProgress(GeneralHighlightingPass.java:214)
    at com.intellij.codeInsight.daemon.impl.ProgressableTextEditorHighlightingPass.doCollectInformation(ProgressableTextEditorHighlightingPass.java:86)
    at com.intellij.codeHighlighting.TextEditorHighlightingPass.collectInformation(TextEditorHighlightingPass.java:61)
    at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass$1$1.run(PassExecutorService.java:355)
    at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1166)
    at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass$1.run(PassExecutorService.java:346)
    at com.intellij.openapi.progress.ProgressManager.executeProcessUnderProgress(ProgressManager.java:209)
    at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:212)
    at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.a(PassExecutorService.java:343)
    at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.run(PassExecutorService.java:319)
    at com.intellij.concurrency.JobLauncherImpl$VoidForkJoinTask.exec(JobLauncherImpl.java:194)
    at jsr166e.ForkJoinTask.doExec(ForkJoinTask.java:260)
    at jsr166e.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:858)
    at jsr166e.ForkJoinPool.scan(ForkJoinPool.java:1687)
    at jsr166e.ForkJoinPool.runWorker(ForkJoinPool.java:1642)
    at jsr166e.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:109)

PhpStorm 7.1, Symfony2 plugin 0.10.39