IDEA-164859 Throwable at com.intellij.openapi.application.impl.NoSwingUnderWriteAction.a

xml/impl/src/com/intellij/codeInsight/daemon/impl/analysis/AddSchemaPrefixIntention.java

@@ -57,6 +57,11 @@ public class AddSchemaPrefixIntention extends PsiElementBaseIntentionAction {
     return NAME;
   }
 
+  @Override
+  public boolean startInWriteAction() {
+    return false;
+  }
+
   @Override
   public void invoke(@NotNull Project project, Editor editor, @NotNull PsiElement element) throws IncorrectOperationException {
     final XmlAttribute xmlns = getXmlnsDeclaration(element);