StringIndexOutOfBoundsException in DI parameter completion

[stof]

String index out of range: -1
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
    at java.lang.String.substring(String.java:1911)
    at fr.adrienbrault.idea.symfony2plugin.util.dict.ServiceUtil.getParameterDefinition(ServiceUtil.java:64)
    at fr.adrienbrault.idea.symfony2plugin.util.dict.ServiceUtil.getServiceClassTargets(ServiceUtil.java:97)
    at fr.adrienbrault.idea.symfony2plugin.config.xml.ParameterXmlReference.multiResolve(ParameterXmlReference.java:35)
    at com.intellij.psi.PsiPolyVariantReferenceBase.resolve(PsiPolyVariantReferenceBase.java:46)
    at com.intellij.codeInsight.TargetElementUtilBase.getReferenceOrReferencedElement(TargetElementUtilBase.java:315)
    at com.intellij.codeInsight.TargetElementUtilBase.findTargetElement(TargetElementUtilBase.java:200)
    at com.intellij.codeInsight.daemon.impl.IdentifierHighlighterPass.doCollectInformation(IdentifierHighlighterPass.java:87)
    at com.intellij.codeHighlighting.TextEditorHighlightingPass.collectInformation(TextEditorHighlightingPass.java:62)
    at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass$1$1.run(PassExecutorService.java:427)
    at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1180)
    at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass$1.run(PassExecutorService.java:418)
    at com.intellij.openapi.progress.ProgressManager.executeProcessUnderProgress(ProgressManager.java:193)
    at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:211)
    at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.a(PassExecutorService.java:415)
    at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.run(PassExecutorService.java:391)
    at com.intellij.concurrency.JobLauncherImpl$VoidForkJoinTask.exec(JobLauncherImpl.java:193)
    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)

env: PhpStorm 8.0.1, plugin 0.11.73