Slow operations in import action

[valis]

Import action may perform slow operations

java.lang.Throwable: Slow operations are prohibited on EDT. See SlowOperations.assertSlowOperationsAreAllowed javadoc.
	at com.intellij.openapi.diagnostic.Logger.error(Logger.java:182)
	at com.intellij.util.SlowOperations.assertSlowOperationsAreAllowed(SlowOperations.java:110)
	at com.intellij.util.indexing.FileBasedIndexImpl.ensureUpToDate(FileBasedIndexImpl.java:754)
	at com.intellij.psi.stubs.StubIndexImpl.getContainingIds(StubIndexImpl.java:501)
	at com.intellij.psi.stubs.StubIndexImpl.processElements(StubIndexImpl.java:305)
	at com.intellij.psi.stubs.StubIndex.getElements(StubIndex.java:100)
	at com.intellij.psi.stubs.StubIndex.getElements(StubIndex.java:88)
	at org.arend.quickfix.referenceResolve.ArendImportHintAction$Companion.getStubElementSet(ArendImportHintAction.kt:150)
	at org.arend.quickfix.referenceResolve.ArendImportHintAction$Companion.doComputeAvailability$lambda-0(ArendImportHintAction.kt:123)
	at com.intellij.psi.util.CachedValuesManager$1.compute(CachedValuesManager.java:158)
	at com.intellij.psi.impl.PsiCachedValueImpl.doCompute(PsiCachedValueImpl.java:39)
	at com.intellij.util.CachedValueBase.lambda$getValueWithLock$3(CachedValueBase.java:227)
	at com.intellij.util.CachedValueBase.computeData(CachedValueBase.java:42)
	at com.intellij.util.CachedValueBase.lambda$getValueWithLock$4(CachedValueBase.java:227)
	at com.intellij.openapi.util.RecursionManager$1.computePreventingRecursion(RecursionManager.java:111)
	at com.intellij.openapi.util.RecursionGuard.doPreventingRecursion(RecursionGuard.java:43)
	at com.intellij.openapi.util.RecursionManager.doPreventingRecursion(RecursionManager.java:68)
	at com.intellij.util.CachedValueBase.getValueWithLock(CachedValueBase.java:228)
	at com.intellij.psi.impl.PsiCachedValueImpl.getValue(PsiCachedValueImpl.java:28)
	at com.intellij.util.CachedValuesManagerImpl.getCachedValue(CachedValuesManagerImpl.java:72)
	at com.intellij.psi.util.CachedValuesManager.getCachedValue(CachedValuesManager.java:155)
	at com.intellij.psi.util.CachedValuesManager.getCachedValue(CachedValuesManager.java:121)
	at org.arend.quickfix.referenceResolve.ArendImportHintAction$Companion.doComputeAvailability(ArendImportHintAction.kt:122)
	at org.arend.quickfix.referenceResolve.ArendImportHintAction$Companion.access$doComputeAvailability(ArendImportHintAction.kt:118)
	at org.arend.quickfix.referenceResolve.ArendImportHintAction.checkAvailability(ArendImportHintAction.kt:57)
	at org.arend.quickfix.referenceResolve.ArendImportHintAction.isAvailable(ArendImportHintAction.kt:53)
	at org.arend.highlight.BasePass.reportToEditor(BasePass.kt:119)
	at org.arend.highlight.BasePass.applyInformationWithProgress(BasePass.kt:78)
	at org.arend.highlight.ArendHighlightingPass.applyInformationWithProgress(ArendHighlightingPass.kt:189)
	at com.intellij.codeInsight.daemon.impl.ProgressableTextEditorHighlightingPass.doApplyInformationToEditor(ProgressableTextEditorHighlightingPass.java:98)
	at com.intellij.codeHighlighting.TextEditorHighlightingPass.applyInformationToEditor(TextEditorHighlightingPass.java:105)
	at com.intellij.codeInsight.daemon.impl.PassExecutorService.lambda$applyInformationToEditorsLater$6(PassExecutorService.java:467)
	at com.intellij.openapi.application.TransactionGuardImpl.runWithWritingAllowed(TransactionGuardImpl.java:214)
	at com.intellij.openapi.application.TransactionGuardImpl.access$200(TransactionGuardImpl.java:21)
	at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:196)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:794)
	at com.intellij.openapi.application.impl.ApplicationImpl.lambda$invokeLater$4(ApplicationImpl.java:350)
	at com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:84)
	at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:133)
	at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:46)
	at com.intellij.openapi.application.impl.FlushQueue$FlushNow.run(FlushQueue.java:189)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:776)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:746)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:886)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:755)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$7(IdeEventQueue.java:442)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:825)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:441)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:794)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:487)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)