[Reference] NullPointerException in the PluginReferenceProvider

[krunal2212]

Describe the bug (*)

A clear and concise description of what the bug is.

java.lang.NullPointerException
	at com.magento.idea.magento2plugin.reference.provider.PluginReferenceProvider.getReferencesByElement(PluginReferenceProvider.java:38)
	at com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistryImpl.getReferences(ReferenceProvidersRegistryImpl.java:199)
	at com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistryImpl.mapNotEmptyReferencesFromProviders(ReferenceProvidersRegistryImpl.java:162)
	at com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistryImpl.doGetReferencesFromProviders(ReferenceProvidersRegistryImpl.java:141)
	at com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistry.getReferencesFromProviders(ReferenceProvidersRegistry.java:43)
	at com.intellij.psi.impl.source.xml.XmlAttributeValueImpl.getReferences(XmlAttributeValueImpl.java:80)
	at com.intellij.psi.impl.SharedPsiElementImplUtil.addReferences(SharedPsiElementImplUtil.java:57)
	at com.intellij.psi.impl.SharedPsiElementImplUtil.findReferenceAt(SharedPsiElementImplUtil.java:33)
	at com.intellij.psi.impl.SharedPsiElementImplUtil.findReferenceAt(SharedPsiElementImplUtil.java:51)
	at com.intellij.psi.impl.source.tree.CompositePsiElement.findReferenceAt(CompositePsiElement.java:118)
	at com.intellij.psi.AbstractFileViewProvider.findReferenceAt(AbstractFileViewProvider.java:238)
	at com.intellij.psi.SingleRootFileViewProvider.findReferenceAt(SingleRootFileViewProvider.java:223)
	at com.intellij.psi.impl.source.PsiFileImpl.findReferenceAt(PsiFileImpl.java:528)
	at com.intellij.codeInsight.TargetElementUtilBase.findReference(TargetElementUtilBase.java:189)
	at com.intellij.codeInsight.TargetElementUtil.findReference(TargetElementUtil.java:93)
	at com.intellij.model.psi.impl.TargetsKt.fromTargetEvaluator(targets.kt:166)
	at com.intellij.model.psi.impl.TargetsKt.declarationsOrReferences(targets.kt:135)
	at com.intellij.model.psi.impl.TargetsKt.declaredReferencedData(targets.kt:40)
	at com.intellij.codeInsight.navigation.impl.GtduKt.fromTargetData(gtdu.kt:57)
	at com.intellij.codeInsight.navigation.impl.GtduKt.gotoDeclarationOrUsagesInner(gtdu.kt:53)
	at com.intellij.codeInsight.navigation.impl.GtduKt.access$gotoDeclarationOrUsagesInner(gtdu.kt:1)
	at com.intellij.codeInsight.navigation.impl.GtduKt$gotoDeclarationOrUsages$1.invoke(gtdu.kt:18)
	at com.intellij.codeInsight.navigation.impl.GtduKt$gotoDeclarationOrUsages$1.invoke(gtdu.kt)
	at com.intellij.codeInsight.navigation.impl.CommonKt.processInjectionThenHost(common.kt:15)
	at com.intellij.codeInsight.navigation.impl.GtduKt.gotoDeclarationOrUsages(gtdu.kt:18)
	at com.intellij.codeInsight.navigation.actions.GotoDeclarationOrUsageHandler2.gotoDeclarationOrUsages(GotoDeclarationOrUsageHandler2.kt:30)
	at com.intellij.codeInsight.navigation.actions.GotoDeclarationOrUsageHandler2.getCtrlMouseInfo(GotoDeclarationOrUsageHandler2.kt:35)
	at com.intellij.codeInsight.navigation.actions.GotoDeclarationAction.getCtrlMouseInfo(GotoDeclarationAction.java:94)
	at com.intellij.codeInsight.navigation.CtrlMouseHandler$TooltipProvider.doExecute(CtrlMouseHandler.java:392)
	at com.intellij.codeInsight.navigation.CtrlMouseHandler$TooltipProvider.lambda$execute$0(CtrlMouseHandler.java:370)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.insideReadAction(NonBlockingReadActionImpl.java:521)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.lambda$attemptComputation$3(NonBlockingReadActionImpl.java:486)
	at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1078)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtils.lambda$runInReadActionWithWriteActionPriority$0(ProgressIndicatorUtils.java:78)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runActionAndCancelBeforeWrite(ProgressIndicatorUtils.java:161)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtils.lambda$runWithWriteActionPriority$1(ProgressIndicatorUtils.java:118)
	at com.intellij.openapi.progress.ProgressManager.lambda$runProcess$0(ProgressManager.java:57)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:183)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:705)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:647)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:63)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:170)
	at com.intellij.openapi.progress.ProgressManager.runProcess(ProgressManager.java:57)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runWithWriteActionPriority(ProgressIndicatorUtils.java:115)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runInReadActionWithWriteActionPriority(ProgressIndicatorUtils.java:78)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.attemptComputation(NonBlockingReadActionImpl.java:486)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.lambda$transferToBgThread$1(NonBlockingReadActionImpl.java:407)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:668)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:665)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:665)
	at java.base/java.lang.Thread.run(Thread.java:829)

To Reproduce (*)

Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior (*)

A clear and concise description of what you expected to happen.

Screenshots

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Please complete the following information: (*)

• OS: Windows 10 10.0
• PhpStorm/Intellij version: 2021.2.2
• Plugin Version: 4.1.0

Additional context

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[m2-assistant]

Hi @krunal2212. Thank you for your report.
To help us process this issue please make sure that you provided sufficient information.

Please, add a comment to assign the issue: @magento I am working on this

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[bohdan-harniuk]

Hello, @krunal2212!

Thank you, for your report!

Why did you duplicate this issue? #664

Thanks, Bohdan