EA-210457 - IAE: PsiDocumentManager.$$$reportNull$$$: project is missed while indexing unsaved scratch file

GitOrigin-RevId: a97b8d2a370d5975dbcc029471c09f180eda7793

platform/lang-impl/src/com/intellij/ide/scratch/ScratchFileActions.java

@@ -152,7 +152,7 @@ public class ScratchFileActions {
     return context;
   }
 
-  static void doCreateNewScratch(@NotNull Project project, @NotNull ScratchFileCreationHelper.Context context) {
+  static PsiFile doCreateNewScratch(@NotNull Project project, @NotNull ScratchFileCreationHelper.Context context) {
     FeatureUsageTracker.getInstance().triggerFeatureUsed("scratch");
     Language language = ObjectUtils.notNull(context.language);
     if (context.fileExtension == null) {
@@ -172,13 +172,14 @@ public class ScratchFileActions {
                                             context.fileExtension);
     VirtualFile file = ScratchRootType.getInstance().createScratchFile(
       project, fileName, language, context.text, context.createOption);
-    if (file == null) return;
+    if (file == null) return null;
 
     PsiNavigationSupport.getInstance().createNavigatable(project, file, context.caretOffset).navigate(true);
     PsiFile psiFile = PsiManager.getInstance(project).findFile(file);
     if (context.ideView != null && psiFile != null) {
       context.ideView.selectElement(psiFile);
     }
+    return psiFile;
   }
 
   private static void checkLanguageAndTryToFixText(@NotNull Project project,

platform/platform-tests/testSrc/com/intellij/ide/scratch/ScratchFileTest.java

@@ -0,0 +1,33 @@
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+package com.intellij.ide.scratch;
+
+import com.intellij.codeInsight.completion.CodeCompletionHandlerBase;
+import com.intellij.codeInsight.completion.CompletionType;
+import com.intellij.lang.xml.XMLLanguage;
+import com.intellij.openapi.editor.Document;
+import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.fileEditor.FileDocumentManager;
+import com.intellij.openapi.fileEditor.FileEditorManager;
+import com.intellij.openapi.fileEditor.TextEditor;
+import com.intellij.psi.PsiFile;
+import com.intellij.testFramework.LightPlatformCodeInsightTestCase;
+
+public class ScratchFileTest extends LightPlatformCodeInsightTestCase {
+
+  public void testXmlCompletion() {
+    ScratchFileCreationHelper.Context context = new ScratchFileCreationHelper.Context();
+    context.language = XMLLanguage.INSTANCE;
+    PsiFile file = ScratchFileActions.doCreateNewScratch(getProject(), context);
+    assertNotNull(file);
+    Document document = FileDocumentManager.getInstance().getDocument(file.getVirtualFile());
+    document.setText("<");
+    Editor editor = ((TextEditor)FileEditorManager.getInstance(getProject()).openFile(file.getVirtualFile(), true)[0]).getEditor();
+    editor.getCaretModel().moveToOffset(1);
+    new CodeCompletionHandlerBase(CompletionType.BASIC).invokeCompletion(getProject(), editor);
+  }
+
+  @Override
+  protected boolean isRunInWriteAction() {
+    return true;
+  }
+}

xml/impl/src/com/intellij/psi/impl/source/xml/DefaultXmlTagNameProvider.java

@@ -111,7 +111,7 @@ public class DefaultXmlTagNameProvider implements XmlTagNameProvider {
     Processor<String> processor = Processors.cancelableCollectProcessor(result);
     fbi.processAllKeys(XmlNamespaceIndex.NAME, processor, tag.getProject());
 
-    final GlobalSearchScope scope = new EverythingGlobalScope();
+    final GlobalSearchScope scope = new EverythingGlobalScope(tag.getProject());
     for (final String ns : result) {
       if (ns.isEmpty()) continue;
       fbi.processValues(XmlNamespaceIndex.NAME, ns, null, new FileBasedIndex.ValueProcessor<XsdNamespaceBuilder>() {