[Bug] NullPointerException at ObserverDeclarationInspection.java:188

[Citizen4our]

Describe the bug (*)

A clear and concise description of what the bug is.

java.lang.NullPointerException
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
	at java.base/java.util.concurrent.ForkJoinTask.getThrowableException(ForkJoinTask.java:603)
	at java.base/java.util.concurrent.ForkJoinTask.reportException(ForkJoinTask.java:678)
	at java.base/java.util.concurrent.ForkJoinTask.join(ForkJoinTask.java:722)
	at com.intellij.concurrency.JobLauncherImpl.processQueue(JobLauncherImpl.java:357)
	at com.intellij.codeInsight.daemon.impl.InspectionRunner.processInOrder(InspectionRunner.java:293)
	at com.intellij.codeInsight.daemon.impl.InspectionRunner.visitElements(InspectionRunner.java:268)
	at com.intellij.codeInsight.daemon.impl.InspectionRunner.lambda$inspect$5(InspectionRunner.java:130)
	at com.intellij.codeInspection.InspectionEngine.withSession(InspectionEngine.java:226)
	at com.intellij.codeInsight.daemon.impl.InspectionRunner.inspect(InspectionRunner.java:109)
	at com.intellij.codeInsight.daemon.impl.LocalInspectionsPass.collectInformationWithProgress(LocalInspectionsPass.java:132)
	at com.intellij.codeInsight.daemon.impl.ProgressableTextEditorHighlightingPass.doCollectInformation(ProgressableTextEditorHighlightingPass.java:97)
	at com.intellij.codeHighlighting.TextEditorHighlightingPass.collectInformation(TextEditorHighlightingPass.java:57)
	at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$doRun$1(PassExecutorService.java:419)
	at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1152)
	at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$doRun$2(PassExecutorService.java:412)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$12(CoreProgressManager.java:608)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:683)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:639)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:607)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:60)
	at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.doRun(PassExecutorService.java:411)
	at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$run$0(PassExecutorService.java:387)
	at com.intellij.openapi.application.impl.ReadMostlyRWLock.executeByImpatientReader(ReadMostlyRWLock.java:174)
	at com.intellij.openapi.application.impl.ApplicationImpl.executeByImpatientReader(ApplicationImpl.java:213)
	at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.run(PassExecutorService.java:385)
	at com.intellij.concurrency.JobLauncherImpl$VoidForkJoinTask$1.exec(JobLauncherImpl.java:184)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)
Caused by: java.lang.NullPointerException
	at com.magento.idea.magento2plugin.inspections.xml.ObserverDeclarationInspection$1.fetchModuleNamesWhereSameObserverNameUsed(ObserverDeclarationInspection.java:188)
	at com.magento.idea.magento2plugin.inspections.xml.ObserverDeclarationInspection$1.visitFile(ObserverDeclarationInspection.java:125)
	at com.intellij.psi.XmlElementVisitor.visitXmlFile(XmlElementVisitor.java:26)
	at com.intellij.psi.impl.source.xml.XmlFileImpl.accept(XmlFileImpl.java:54)
	at com.intellij.codeInsight.daemon.impl.InspectionRunner.lambda$processInOrder$10(InspectionRunner.java:317)
	at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1152)
	at com.intellij.codeInsight.daemon.impl.InspectionRunner.lambda$processInOrder$11(InspectionRunner.java:296)
	at com.intellij.openapi.application.impl.ReadMostlyRWLock.executeByImpatientReader(ReadMostlyRWLock.java:174)
	at com.intellij.openapi.application.impl.ApplicationImpl.executeByImpatientReader(ApplicationImpl.java:213)
	at com.intellij.codeInsight.daemon.impl.InspectionRunner.lambda$processInOrder$12(InspectionRunner.java:330)
	at com.intellij.util.AstLoadingFilter.forceAllowTreeLoading(AstLoadingFilter.java:159)
	at com.intellij.util.AstLoadingFilter.forceAllowTreeLoading(AstLoadingFilter.java:151)
	at com.intellij.codeInsight.daemon.impl.InspectionRunner.lambda$processInOrder$13(InspectionRunner.java:294)
	at com.intellij.util.AstLoadingFilter.disallowTreeLoading(AstLoadingFilter.java:130)
	at com.intellij.util.AstLoadingFilter.disallowTreeLoading(AstLoadingFilter.java:119)
	at com.intellij.codeInsight.daemon.impl.InspectionRunner.lambda$processInOrder$14(InspectionRunner.java:294)
	at com.intellij.concurrency.JobLauncherImpl$1MyProcessQueueTask.lambda$call$0(JobLauncherImpl.java:297)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$12(CoreProgressManager.java:608)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:683)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:639)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:607)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:60)
	at com.intellij.concurrency.JobLauncherImpl$1MyProcessQueueTask.call(JobLauncherImpl.java:282)
	at com.intellij.concurrency.JobLauncherImpl$1MyProcessQueueTask.call(JobLauncherImpl.java:270)
	at java.base/java.util.concurrent.ForkJoinTask$AdaptedCallable.exec(ForkJoinTask.java:1448)
	... 5 more

To Reproduce (*)

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4. See error

Expected behavior (*)

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Screenshots

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Please complete the following information: (*)

• OS: Mac OS X 12.4
• PhpStorm/Intellij version: 2022.1.1
• Plugin Version: 4.3.1

Additional context

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[m2-assistant]

Hi @Citizen4our. Thank you for your report.
To speed up processing of this issue, make sure that you provided sufficient information.

Add a comment to assign the issue: @magento I am working on this

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[SilinMykola]

@magento I am working on this