org.antlr.intellij.plugin.ANTLRv4ExternalAnnotator Exception

[zeta9044]

Intellij IEDA version: 2023.3.6 (Ultimate Edition)
build number: #IU-233.15026.9

Antlr4 plugin version : 1.23.1

ExternalToolPass:

com.intellij.diagnostic.PluginException: annotator: org.antlr.intellij.plugin.ANTLRv4ExternalAnnotator@2a2495be (class org.antlr.intellij.plugin.ANTLRv4ExternalAnnotator) [Plugin: org.antlr.intellij.plugin]
	at com.intellij.diagnostic.PluginProblemReporterImpl.createPluginExceptionByClass(PluginProblemReporterImpl.java:23)
	at com.intellij.diagnostic.PluginException.createByClass(PluginException.java:89)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass.processError(ExternalToolPass.java:253)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass.doAnnotate(ExternalToolPass.java:212)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass.doAnnotate(ExternalToolPass.java:203)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass$1.lambda$run$0(ExternalToolPass.java:164)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass.runChangeAware(ExternalToolPass.java:268)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass$1.lambda$run$2(ExternalToolPass.java:164)
	at com.intellij.openapi.progress.util.BackgroundTaskUtil.lambda$runUnderDisposeAwareIndicator$15(BackgroundTaskUtil.java:371)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$1(CoreProgressManager.java:192)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$12(CoreProgressManager.java:610)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:685)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:641)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:609)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:78)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:179)
	at com.intellij.openapi.progress.util.BackgroundTaskUtil.runUnderDisposeAwareIndicator(BackgroundTaskUtil.java:366)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass$1.run(ExternalToolPass.java:162)
	at com.intellij.util.concurrency.ChildContext$runAsCoroutine$1.invoke(propagation.kt:81)
	at com.intellij.util.concurrency.ChildContext$runAsCoroutine$1.invoke(propagation.kt:81)
	at com.intellij.util.concurrency.ChildContext.runAsCoroutine(propagation.kt:86)
	at com.intellij.util.concurrency.ChildContext.runAsCoroutine(propagation.kt:81)
	at com.intellij.util.ui.update.Update.runUpdate(Update.java:113)
	at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:348)
	at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:338)
	at com.intellij.util.ui.update.MergingUpdateQueue.doFlush(MergingUpdateQueue.java:295)
	at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:277)
	at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:246)
	at com.intellij.util.concurrency.ChildContext$runAsCoroutine$1.invoke(propagation.kt:81)
	at com.intellij.util.concurrency.ChildContext$runAsCoroutine$1.invoke(propagation.kt:81)
	at com.intellij.util.concurrency.ChildContext.runAsCoroutine(propagation.kt:86)
	at com.intellij.util.concurrency.ChildContext.runAsCoroutine(propagation.kt:81)
	at com.intellij.util.Alarm$Request.lambda$runSafely$0(Alarm.java:369)
	at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:253)
	at com.intellij.util.Alarm$Request.runSafely(Alarm.java:369)
	at com.intellij.util.Alarm$Request.run(Alarm.java:356)
	at com.intellij.util.concurrency.Propagation.contextAwareCallable$lambda$2(propagation.kt:357)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at com.intellij.util.concurrency.SchedulingWrapper$MyScheduledFutureTask.run(SchedulingWrapper.java:272)
	at com.intellij.util.concurrency.BoundedTaskExecutor.doRun(BoundedTaskExecutor.java:244)
	at com.intellij.util.concurrency.BoundedTaskExecutor.access$200(BoundedTaskExecutor.java:30)
	at com.intellij.util.concurrency.BoundedTaskExecutor$1.executeFirstTaskAndHelpQueue(BoundedTaskExecutor.java:222)
	at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:218)
	at com.intellij.util.concurrency.BoundedTaskExecutor$1.run(BoundedTaskExecutor.java:210)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:702)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:699)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:699)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: java.lang.NullPointerException: Cannot invoke "com.intellij.openapi.vfs.VirtualFile.getPath()" because the return value of "com.intellij.openapi.vfs.VirtualFile.getParent()" is null
	at org.antlr.intellij.plugin.parsing.RunANTLROnGrammarFile.getParentDir(RunANTLROnGrammarFile.java:264)
	at org.antlr.intellij.plugin.parsing.RunANTLROnGrammarFile.getANTLRArgs(RunANTLROnGrammarFile.java:194)
	at org.antlr.intellij.plugin.parsing.RunANTLROnGrammarFile.getANTLRArgsAsList(RunANTLROnGrammarFile.java:179)
	at org.antlr.intellij.plugin.validation.GrammarIssuesCollector.collectGrammarIssues(GrammarIssuesCollector.java:37)
	at org.antlr.intellij.plugin.ANTLRv4ExternalAnnotator.lambda$doAnnotate$0(ANTLRv4ExternalAnnotator.java:39)
	at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:894)
	at org.antlr.intellij.plugin.ANTLRv4ExternalAnnotator.doAnnotate(ANTLRv4ExternalAnnotator.java:38)
	at org.antlr.intellij.plugin.ANTLRv4ExternalAnnotator.doAnnotate(ANTLRv4ExternalAnnotator.java:25)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass.doAnnotate(ExternalToolPass.java:209)
	... 47 more