diff --git a/jps/jps-builders/src/org/jetbrains/jps/backwardRefs/BackwardReferenceIndexWriter.java b/jps/jps-builders/src/org/jetbrains/jps/backwardRefs/BackwardReferenceIndexWriter.java
index bba1c105a7ec..dcc556c97a00 100644
--- a/jps/jps-builders/src/org/jetbrains/jps/backwardRefs/BackwardReferenceIndexWriter.java
+++ b/jps/jps-builders/src/org/jetbrains/jps/backwardRefs/BackwardReferenceIndexWriter.java
@@ -35,9 +35,7 @@ import org.jetbrains.jps.model.java.compiler.JavaCompilers;
 
 import java.io.File;
 import java.io.IOException;
-import java.util.ArrayList;
 import java.util.Collection;
-import java.util.List;
 import java.util.Set;
 
 import static com.sun.tools.javac.code.Flags.PRIVATE;
@@ -166,7 +164,7 @@ public class BackwardReferenceIndexWriter {
 
   synchronized void writeReferences(int fileId, Collection<JavacRefSymbol> refs) {
     final ByteArrayEnumerator byteSeqEum = myIndex.getByteSeqEum();
-    final List<LightRef> usages = ContainerUtil.mapNotNull(refs, new Function<JavacRefSymbol, LightRef>() {
+    final Set<LightRef> usages = ContainerUtil.map2SetNotNull(refs, new Function<JavacRefSymbol, LightRef>() {
       @Override
       public LightRef fun(JavacRefSymbol symbol) {
         return fromSymbol(symbol, byteSeqEum);
@@ -186,7 +184,7 @@ public class BackwardReferenceIndexWriter {
 
   private void updateReferenceIndicesIncrementally(int fileId, Collection<LightRef> usages) {
     final Collection<LightRef> rawOldUsages = myIndex.getReferenceMap().get(fileId);
-    Collection<LightRef> oldUsages = rawOldUsages == null ? null : new ArrayList<LightRef>(rawOldUsages);
+    Collection<LightRef> oldUsages = rawOldUsages == null ? null : new THashSet<LightRef>(rawOldUsages);
     for (LightRef usage : usages) {
       if (oldUsages == null || !oldUsages.remove(usage)) {
         myIndex.getBackwardReferenceMap().put(usage, fileId);
diff --git a/platform/lang-impl/src/com/intellij/execution/runners/DefaultProgramRunnerImpl.kt b/platform/lang-impl/src/com/intellij/execution/runners/DefaultRunProgramRunner.kt
similarity index 93%
rename from platform/lang-impl/src/com/intellij/execution/runners/DefaultProgramRunnerImpl.kt
rename to platform/lang-impl/src/com/intellij/execution/runners/DefaultRunProgramRunner.kt
index dcae4b26ee35..50082aedb035 100644
--- a/platform/lang-impl/src/com/intellij/execution/runners/DefaultProgramRunnerImpl.kt
+++ b/platform/lang-impl/src/com/intellij/execution/runners/DefaultRunProgramRunner.kt
@@ -24,8 +24,8 @@ import com.intellij.openapi.fileEditor.FileDocumentManager
 import org.jetbrains.concurrency.Promise
 import org.jetbrains.concurrency.resolvedPromise
 
-private class DefaultProgramRunnerImpl : AsyncGenericProgramRunner<RunnerSettings>() {
-  override fun getRunnerId() = "defaultRunner"
+private class DefaultRunProgramRunner : AsyncGenericProgramRunner<RunnerSettings>() {
+  override fun getRunnerId() = "defaultRunRunner"
 
   override fun prepare(environment: ExecutionEnvironment, state: RunProfileState): Promise<RunProfileStarter> {
     FileDocumentManager.getInstance().saveAllDocuments()
diff --git a/platform/lang-impl/src/com/intellij/formatting/FormattingMode.java b/platform/lang-impl/src/com/intellij/formatting/FormattingMode.java
index 165482ce317b..758569f8a283 100644
--- a/platform/lang-impl/src/com/intellij/formatting/FormattingMode.java
+++ b/platform/lang-impl/src/com/intellij/formatting/FormattingMode.java
@@ -16,10 +16,23 @@
 package com.intellij.formatting;
 
 /**
- * @author Denis Zhdanov
- * @since 8/22/12 2:44 PM
+ * The current formatting mode.
  */
 public enum FormattingMode {
-  
-  REFORMAT, ADJUST_INDENT, ADJUST_INDENT_ON_ENTER
+
+  /**
+   * Normal reformat (modifies indents and inline whitespaces).
+   */
+  REFORMAT,
+
+  /**
+   * Line indent adjustment.
+   */
+  ADJUST_INDENT,
+
+  /**
+   * Indent adjustment on a new line after Enter.  In some cases a behavior may be different from the case when the same code is
+   * reformatted or indented, especially when some more input is expected to follow on the new line.
+   */ 
+  ADJUST_INDENT_ON_ENTER
 }
diff --git a/platform/lang-impl/src/com/intellij/ide/projectView/BaseProjectTreeBuilder.java b/platform/lang-impl/src/com/intellij/ide/projectView/BaseProjectTreeBuilder.java
index dcbf7ed025f4..3d92e7364fcd 100644
--- a/platform/lang-impl/src/com/intellij/ide/projectView/BaseProjectTreeBuilder.java
+++ b/platform/lang-impl/src/com/intellij/ide/projectView/BaseProjectTreeBuilder.java
@@ -22,6 +22,7 @@ import com.intellij.ide.favoritesTreeView.FavoritesTreeNodeDescriptor;
 import com.intellij.ide.util.treeView.AbstractTreeBuilder;
 import com.intellij.ide.util.treeView.AbstractTreeNode;
 import com.intellij.ide.util.treeView.AbstractTreeStructure;
+import com.intellij.ide.util.treeView.AbstractTreeUpdater;
 import com.intellij.ide.util.treeView.NodeDescriptor;
 import com.intellij.openapi.progress.ProgressIndicator;
 import com.intellij.openapi.progress.Progressive;
@@ -160,11 +161,14 @@ public abstract class BaseProjectTreeBuilder extends AbstractTreeBuilder {
                                  final boolean requestFocus,
                                  final Condition<AbstractTreeNode> nonStopCondition) {
 
+    AbstractTreeUpdater updater = getUpdater();
+    if (updater == null) return ActionCallback.REJECTED;
+
     final ActionCallback result = new ActionCallback();
 
     final FocusRequestor requestor = IdeFocusManager.getInstance(myProject).getFurtherRequestor();
 
-    UiActivityMonitor.getInstance().addActivity(myProject, new UiActivity.AsyncBgOperation("projectViewSelect"), getUpdater().getModalityState());
+    UiActivityMonitor.getInstance().addActivity(myProject, new UiActivity.AsyncBgOperation("projectViewSelect"), updater.getModalityState());
     batch(indicator -> {
       _select(element, file, requestFocus, nonStopCondition, result, indicator, null, requestor, false);
       UiActivityMonitor.getInstance().removeActivity(myProject, new UiActivity.AsyncBgOperation("projectViewSelect"));
diff --git a/platform/platform-resources/src/META-INF/PlatformLangPlugin.xml b/platform/platform-resources/src/META-INF/PlatformLangPlugin.xml
index 4c7beb1e2b46..5b36b9cc07f2 100644
--- a/platform/platform-resources/src/META-INF/PlatformLangPlugin.xml
+++ b/platform/platform-resources/src/META-INF/PlatformLangPlugin.xml
@@ -75,7 +75,7 @@
 
     <treeStructureProvider implementation="com.intellij.platform.PlatformProjectViewStructureProvider"/>
 
-    <programRunner implementation="com.intellij.execution.runners.DefaultProgramRunnerImpl" order="last"/>
+    <programRunner implementation="com.intellij.execution.runners.DefaultRunProgramRunner" order="last"/>
 
     <projectConfigurable groupId="editor" groupWeight="160" displayName="Inspections" id="Errors" instance="com.intellij.profile.codeInspection.ui.ProjectInspectionToolsConfigurable" order="before preferences.intentionPowerPack"/>
     <projectConfigurable groupId="appearance" groupWeight="111" instance="com.intellij.ide.util.scopeChooser.ScopeChooserConfigurable" id="project.scopes" key="scopes.display.name" bundle="messages.IdeBundle" />
diff --git a/resources/src/idea/RichPlatformPlugin.xml b/resources/src/idea/RichPlatformPlugin.xml
index 8a7eab221bcf..ff41b7b47691 100644
--- a/resources/src/idea/RichPlatformPlugin.xml
+++ b/resources/src/idea/RichPlatformPlugin.xml
@@ -341,7 +341,7 @@
     <stepsBeforeRunProvider implementation="com.intellij.compiler.options.CompileStepBeforeRunNoErrorCheck" id="compileBeforeRunNoErrorCheck" order="after compileBeforeRun"/>
     <stepsBeforeRunProvider implementation="com.intellij.packaging.impl.run.BuildArtifactsBeforeRunTaskProvider" order="after compileBeforeRunNoErrorCheck"/>
     <programRunner id="defaultRunRunner" implementation="com.intellij.execution.impl.DefaultJavaProgramRunner"/>
-    <programRunner implementation="com.intellij.execution.runners.DefaultProgramRunnerImpl" order="last"/>
+    <programRunner implementation="com.intellij.execution.runners.DefaultRunProgramRunner" order="last"/>
 
     <hectorComponentProvider implementation="com.intellij.codeInsight.daemon.impl.ImportPopupHectorComponentProvider"/>