IllegalArgumentException "@NotNull parameter 'file'" while opening/editing project in Webstorm

[mhankus]

Description

webstorm complains about exceptions in emberjs plugin (little red exclamation in bottom right corner)

Steps to Reproduce

Open project with hbs files

Expected behavior: [What you expect to happen]
No exception should occure.

Actual behavior: [What actually happens]
IllegalArgumentException is thrown

ExternalToolPass: 

com.intellij.diagnostic.PluginException: annotator: TemplateLintExternalAnnotator@2100e3cf (class TemplateLintExternalAnnotator) [Plugin: com.emberjs]
	at com.intellij.ide.plugins.PluginManagerCore.createPluginException(PluginManagerCore.java:274)
	at com.intellij.diagnostic.PluginProblemReporterImpl.createPluginExceptionByClass(PluginProblemReporterImpl.java:12)
	at com.intellij.diagnostic.PluginException.createByClass(PluginException.java:91)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass.process(ExternalToolPass.java:256)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass.doAnnotate(ExternalToolPass.java:207)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass$1.lambda$run$0(ExternalToolPass.java:180)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass.runChangeAware(ExternalToolPass.java:271)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass$1.lambda$run$2(ExternalToolPass.java:180)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$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.util.BackgroundTaskUtil.runUnderDisposeAwareIndicator(BackgroundTaskUtil.java:270)
	at com.intellij.openapi.progress.util.BackgroundTaskUtil.runUnderDisposeAwareIndicator(BackgroundTaskUtil.java:248)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass$1.run(ExternalToolPass.java:179)
	at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:333)
	at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:323)
	at com.intellij.util.ui.update.MergingUpdateQueue.lambda$flush$1(MergingUpdateQueue.java:273)
	at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:287)
	at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:242)
	at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:240)
	at com.intellij.util.Alarm$Request.runSafely(Alarm.java:391)
	at com.intellij.util.Alarm$Request.run(Alarm.java:377)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at com.intellij.util.concurrency.SchedulingWrapper$MyScheduledFutureTask.run(SchedulingWrapper.java:220)
	at com.intellij.util.concurrency.BoundedTaskExecutor.doRun(BoundedTaskExecutor.java:216)
	at com.intellij.util.concurrency.BoundedTaskExecutor.access$200(BoundedTaskExecutor.java:27)
	at com.intellij.util.concurrency.BoundedTaskExecutor$1.execute(BoundedTaskExecutor.java:195)
	at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:213)
	at com.intellij.util.concurrency.BoundedTaskExecutor$1.run(BoundedTaskExecutor.java:184)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$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)
Caused by: java.lang.IllegalArgumentException: Argument for @NotNull parameter 'file' of com/intellij/lang/javascript/linter/LinterUnsavedConfigFileManager.isFileModified must not be null
	at com.intellij.lang.javascript.linter.LinterUnsavedConfigFileManager.$$$reportNull$$$0(LinterUnsavedConfigFileManager.java)
	at com.intellij.lang.javascript.linter.LinterUnsavedConfigFileManager.isFileModified(LinterUnsavedConfigFileManager.java)
	at java.base/java.util.stream.MatchOps$1MatchSink.accept(MatchOps.java:90)
	at java.base/java.util.AbstractList$RandomAccessSpliterator.tryAdvance(AbstractList.java:706)
	at java.base/java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:127)
	at java.base/java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:502)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:488)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.MatchOps$MatchOp.evaluateSequential(MatchOps.java:230)
	at java.base/java.util.stream.MatchOps$MatchOp.evaluateSequential(MatchOps.java:196)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.anyMatch(ReferencePipeline.java:528)
	at com.intellij.lang.javascript.linter.LinterUnsavedConfigFileManager.requestSaveIfNeeded(LinterUnsavedConfigFileManager.java:49)
	at TemplateLintExternalRunner.execute$lambda-1(TemplateLintExternalRunner.kt:189)
	at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:854)
	at com.intellij.openapi.application.ReadAction.compute(ReadAction.java:61)
	at TemplateLintExternalRunner.execute(TemplateLintExternalRunner.kt:184)
	at TemplateLintExternalAnnotator.annotate(TemplateLintExternalAnnotator.kt:30)
	at TemplateLintExternalAnnotator.annotate(TemplateLintExternalAnnotator.kt:12)
	at com.intellij.lang.javascript.linter.JSLinterWithInspectionExternalAnnotator.doAnnotate(JSLinterWithInspectionExternalAnnotator.java:136)
	at com.intellij.lang.javascript.linter.JSLinterWithInspectionExternalAnnotator.doAnnotate(JSLinterWithInspectionExternalAnnotator.java:22)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass.doAnnotate(ExternalToolPass.java:204)
	... 34 more

• Version of the plugin
  2021.2.1

Additional Information

Impact of this bug is minimal.