What are the steps to reproduce this issue?（重现步骤？）
输入function, 概率性报错
What happens?（出现什么问题？）
java.lang.NullPointerException
at com.tang.intellij.lua.psi.LuaPsiImplUtilKt$getPresentation$2.getPresentableText(LuaPsiImplUtil.kt:161)
at com.intellij.find.findUsages.PsiElement2UsageTargetAdapter.update(PsiElement2UsageTargetAdapter.java:256)
at com.intellij.find.findUsages.PsiElement2UsageTargetAdapter.(PsiElement2UsageTargetAdapter.java:58)
at com.intellij.find.findUsages.PsiElement2UsageTargetAdapter.(PsiElement2UsageTargetAdapter.java:63)
at com.intellij.find.findUsages.PsiElement2UsageTargetAdapter.(PsiElement2UsageTargetAdapter.java:85)
at com.intellij.find.findUsages.DefaultUsageTargetProvider.getTargets(DefaultUsageTargetProvider.java:17)
at com.intellij.usages.UsageTargetUtil.findUsageTargets(UsageTargetUtil.java:51)
at com.intellij.usages.UsageTargetUtil.findUsageTargets(UsageTargetUtil.java:32)
at com.intellij.ide.impl.dataRules.UsageTargetsRule.getData(UsageTargetsRule.java:13)
at com.intellij.ide.impl.DataManagerImpl.getRulesData(DataManagerImpl.java:139)
at com.intellij.ide.impl.DataManagerImpl.lambda$getDataRule$4(DataManagerImpl.java:127)
at com.intellij.ide.impl.DataManagerImpl.getDataFromProvider(DataManagerImpl.java:77)
at com.intellij.openapi.actionSystem.impl.PreCachedDataContext.getData(PreCachedDataContext.java:182)
at com.intellij.openapi.actionSystem.DataContext.getData(DataContext.java:42)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.ensureSlowDataKeysPreCached(ActionUpdater.java:409)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$callAction$5(ActionUpdater.java:186)
at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1152)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.callAction(ActionUpdater.java:186)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.updateActionReal(ActionUpdater.java:127)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$new$0(ActionUpdater.java:112)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.update(ActionUpdater.java:634)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.expandGroupChild(ActionUpdater.java:478)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$doExpandActionGroup$20(ActionUpdater.java:457)
at com.intellij.util.containers.ContainerUtil.concat(ContainerUtil.java:1400)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.doExpandActionGroup(ActionUpdater.java:457)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.expandGroupChild(ActionUpdater.java:535)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$doExpandActionGroup$20(ActionUpdater.java:457)
at com.intellij.util.containers.ContainerUtil.concat(ContainerUtil.java:1400)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.doExpandActionGroup(ActionUpdater.java:457)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.expandActionGroup(ActionUpdater.java:260)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$expandActionGroupAsync$12(ActionUpdater.java:321)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$expandActionGroupAsync$13(ActionUpdater.java:339)
at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1152)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$tryRunReadActionAndCancelBeforeWrite$17(ActionUpdater.java:371)
at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runActionAndCancelBeforeWrite(ProgressIndicatorUtils.java:158)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.tryRunReadActionAndCancelBeforeWrite(ActionUpdater.java:367)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$expandActionGroupAsync$14(ActionUpdater.java:339)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:189)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$12(CoreProgressManager.java:608)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:683)
at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:639)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:607)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:60)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:176)
at com.intellij.openapi.progress.util.BackgroundTaskUtil.runUnderDisposeAwareIndicator(BackgroundTaskUtil.java:365)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$expandActionGroupAsync$15(ActionUpdater.java:338)
at com.intellij.util.concurrency.BoundedTaskExecutor.doRun(BoundedTaskExecutor.java:241)
at com.intellij.util.concurrency.BoundedTaskExecutor.access$200(BoundedTaskExecutor.java:31)
at com.intellij.util.concurrency.BoundedTaskExecutor$1.execute(BoundedTaskExecutor.java:214)
at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:212)
at com.intellij.util.concurrency.BoundedTaskExecutor$1.run(BoundedTaskExecutor.java:203)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$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$1.run(Executors.java:665)
at java.base/java.lang.Thread.run(Thread.java:829)
What are the steps to reproduce this issue?（重现步骤？）
输入function, 概率性报错
What happens?（出现什么问题？）
java.lang.NullPointerException at com.tang.intellij.lua.psi.LuaPsiImplUtilKt$getPresentation$2.getPresentableText(LuaPsiImplUtil.kt:161) at com.intellij.find.findUsages.PsiElement2UsageTargetAdapter.update(PsiElement2UsageTargetAdapter.java:256) at com.intellij.find.findUsages.PsiElement2UsageTargetAdapter.(PsiElement2UsageTargetAdapter.java:58)
at com.intellij.find.findUsages.PsiElement2UsageTargetAdapter.(PsiElement2UsageTargetAdapter.java:63)
at com.intellij.find.findUsages.PsiElement2UsageTargetAdapter.(PsiElement2UsageTargetAdapter.java:85)
at com.intellij.find.findUsages.DefaultUsageTargetProvider.getTargets(DefaultUsageTargetProvider.java:17)
at com.intellij.usages.UsageTargetUtil.findUsageTargets(UsageTargetUtil.java:51)
at com.intellij.usages.UsageTargetUtil.findUsageTargets(UsageTargetUtil.java:32)
at com.intellij.ide.impl.dataRules.UsageTargetsRule.getData(UsageTargetsRule.java:13)
at com.intellij.ide.impl.DataManagerImpl.getRulesData(DataManagerImpl.java:139)
at com.intellij.ide.impl.DataManagerImpl.lambda$getDataRule$4(DataManagerImpl.java:127)
at com.intellij.ide.impl.DataManagerImpl.getDataFromProvider(DataManagerImpl.java:77)
at com.intellij.openapi.actionSystem.impl.PreCachedDataContext.getData(PreCachedDataContext.java:182)
at com.intellij.openapi.actionSystem.DataContext.getData(DataContext.java:42)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.ensureSlowDataKeysPreCached(ActionUpdater.java:409)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$callAction$5(ActionUpdater.java:186)
at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1152)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.callAction(ActionUpdater.java:186)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.updateActionReal(ActionUpdater.java:127)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$new$0(ActionUpdater.java:112)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.update(ActionUpdater.java:634)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.expandGroupChild(ActionUpdater.java:478)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$doExpandActionGroup$20(ActionUpdater.java:457)
at com.intellij.util.containers.ContainerUtil.concat(ContainerUtil.java:1400)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.doExpandActionGroup(ActionUpdater.java:457)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.expandGroupChild(ActionUpdater.java:535)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$doExpandActionGroup$20(ActionUpdater.java:457)
at com.intellij.util.containers.ContainerUtil.concat(ContainerUtil.java:1400)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.doExpandActionGroup(ActionUpdater.java:457)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.expandActionGroup(ActionUpdater.java:260)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$expandActionGroupAsync$12(ActionUpdater.java:321)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$expandActionGroupAsync$13(ActionUpdater.java:339)
at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1152)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$tryRunReadActionAndCancelBeforeWrite$17(ActionUpdater.java:371)
at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runActionAndCancelBeforeWrite(ProgressIndicatorUtils.java:158)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.tryRunReadActionAndCancelBeforeWrite(ActionUpdater.java:367)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$expandActionGroupAsync$14(ActionUpdater.java:339)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:189)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$12(CoreProgressManager.java:608)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:683)
at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:639)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:607)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:60)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:176)
at com.intellij.openapi.progress.util.BackgroundTaskUtil.runUnderDisposeAwareIndicator(BackgroundTaskUtil.java:365)
at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$expandActionGroupAsync$15(ActionUpdater.java:338)
at com.intellij.util.concurrency.BoundedTaskExecutor.doRun(BoundedTaskExecutor.java:241)
at com.intellij.util.concurrency.BoundedTaskExecutor.access$200(BoundedTaskExecutor.java:31)
at com.intellij.util.concurrency.BoundedTaskExecutor$1.execute(BoundedTaskExecutor.java:214)
at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:212)
at com.intellij.util.concurrency.BoundedTaskExecutor$1.run(BoundedTaskExecutor.java:203)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$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)
What were you expecting to happen?（期望？）
…
Any logs, error output, etc?（有没有什么log, error输出？）
(If it’s long, please paste to https://ghostbin.com/ and insert the link here.)
Any other comments?（其它说明）
…