... just like AndroidReferenceSearchExecutor does. Otherwise, we get
com.intellij.openapi.application.impl.ApplicationImpl$NoReadAccessException
[java] [uitest] at com.intellij.openapi.application.impl.ApplicationImpl.assertReadAccessAllowed(ApplicationImpl.java:1070)
[java] [uitest] at com.intellij.psi.impl.source.tree.CompositeElement.textToCharArray(CompositeElement.java:291)
[java] [uitest] at com.intellij.psi.impl.source.tree.CompositeElement.getText(CompositeElement.java:261)
[java] [uitest] at com.intellij.psi.impl.source.xml.XmlAttributeValueImpl.getValue(XmlAttributeValueImpl.java:72)
[java] [uitest] at org.jetbrains.android.dom.wrappers.ValueResourceElementWrapper.getValue(ValueResourceElementWrapper.java:458)
[java] [uitest] at org.jetbrains.kotlin.AndroidExtensionsReferenceSearchExecutor.processQuery(AndroidExtensionsReferenceSearchExecutor.kt:42)
[java] [uitest] at org.jetbrains.kotlin.AndroidExtensionsReferenceSearchExecutor.processQuery(AndroidExtensionsReferenceSearchExecutor.kt:38)
[java] [uitest] at com.intellij.openapi.application.QueryExecutorBase.execute(QueryExecutorBase.java:87)
[java] [uitest] at com.intellij.util.ExecutorsQuery.processResults(ExecutorsQuery.java:45)
[java] [uitest] at com.intellij.util.AbstractQuery.forEach(AbstractQuery.java:79)
[java] [uitest] at com.intellij.util.UniqueResultsQuery.process(UniqueResultsQuery.java:66)
[java] [uitest] at com.intellij.util.UniqueResultsQuery.forEach(UniqueResultsQuery.java:56)
[java] [uitest] at com.intellij.psi.search.QuerySearchRequest.runQuery(QuerySearchRequest.java:53)
[java] [uitest] at com.intellij.psi.impl.search.PsiSearchHelperImpl.appendCollectorsFromQueryRequests(PsiSearchHelperImpl.java:635)
[java] [uitest] at com.intellij.psi.impl.search.PsiSearchHelperImpl.processRequests(PsiSearchHelperImpl.java:596)
[java] [uitest] at com.intellij.psi.search.SearchRequestQuery.processResults(SearchRequestQuery.java:45)
[java] [uitest] at com.intellij.util.AbstractQuery.forEach(AbstractQuery.java:79)
[java] [uitest] at com.intellij.util.MergeQuery.processSubQuery(MergeQuery.java:85)
[java] [uitest] at com.intellij.util.MergeQuery.forEach(MergeQuery.java:57)
[java] [uitest] at com.intellij.util.MergeQuery.findFirst(MergeQuery.java:51)
[java] [uitest] at com.intellij.util.UniqueResultsQuery.findFirst(UniqueResultsQuery.java:51)
[java] [uitest] at com.android.tools.idea.editors.theme.ThemeEditorComponent$19.doInBackground(ThemeEditorComponent.java:895)
[java] [uitest] at com.android.tools.idea.editors.theme.ThemeEditorComponent$19.doInBackground(ThemeEditorComponent.java:891)
[java] [uitest] at javax.swing.SwingWorker$1.call(SwingWorker.java:295)
[java] [uitest] at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[java] [uitest] at javax.swing.SwingWorker.run(SwingWorker.java:334)
[java] [uitest] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[java] [uitest] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[java] [uitest] at java.lang.Thread.run(Thread.java:745)
[java] [uitest] [ 72230] ERROR - plication.impl.ApplicationImpl - Android Studio 3.1 Canary Build #171.SNAPSHOT
When more than one layout configuration is available, a particular resource (view or fragment) may be absent in some of them.
We should show a warning on such resource reference calls as the call may lead to NPE.