#493 It's prohibited to access index during event dispatching

gradle.properties

@@ -2,7 +2,7 @@
 # https://www.jetbrains.com/intellij-repository/releases
 # https://www.jetbrains.com/intellij-repository/snapshots
 
-ideaVersion = 2017.1.5
+ideaVersion = 2016.3.7
 ideaType = IC
 javaVersion = 1.6
 javaTargetVersion = 1.6
@@ -23,4 +23,4 @@ publishChannel =
 org.gradle.jvmargs=-XX:MaxPermSize=512m -XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled -XX:+HeapDumpOnOutOfMemoryError -Xmx1024m -Dfile.encoding=utf-8
 JDK6_HOME=/usr/lib/jvm/java-6-jdk/
 
-idePath =
+idePath = /home/hsz/IDE/idea-IU-171.4694.70

src/mobi/hsz/idea/gitignore/util/Utils.java

@@ -28,8 +28,6 @@
 import com.intellij.ide.plugins.IdeaPluginDescriptorImpl;
 import com.intellij.ide.plugins.PluginManager;
 import com.intellij.ide.projectView.PresentationData;
-import com.intellij.openapi.application.Application;
-import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.editor.Document;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.editor.EditorFactory;
@@ -48,15 +46,12 @@
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.openapi.vfs.VfsUtilCore;
 import com.intellij.openapi.vfs.VirtualFile;
-import com.intellij.openapi.vfs.VirtualFileManager;
 import com.intellij.psi.FileViewProvider;
 import com.intellij.psi.PsiDirectory;
 import com.intellij.psi.PsiFile;
 import com.intellij.psi.PsiManager;
-import com.intellij.psi.util.PsiModificationTracker;
 import com.intellij.ui.SimpleTextAttributes;
 import com.intellij.util.containers.ContainerUtil;
-import com.intellij.util.messages.MessageBus;
 import mobi.hsz.idea.gitignore.IgnoreBundle;
 import mobi.hsz.idea.gitignore.command.CreateFileCommandAction;
 import mobi.hsz.idea.gitignore.file.type.IgnoreFileType;
@@ -66,6 +61,7 @@
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.lang.reflect.InvocationTargetException;
 import java.util.*;
 
 import static com.intellij.ui.SimpleTextAttributes.REGULAR_ATTRIBUTES;
@@ -548,10 +544,19 @@ public static void addColoredText(@NotNull PresentationData data, @NotNull Strin
      * @return event is processed
      */
     public static boolean isInsideEventProcessing() {
-        Application application = ApplicationManager.getApplication();
-        if (!application.isWriteAccessAllowed()) return false;
-
-        MessageBus bus = application.getMessageBus();
-        return bus.hasUndeliveredEvents(VirtualFileManager.VFS_CHANGES) || bus.hasUndeliveredEvents(PsiModificationTracker.TOPIC);
+        try {
+            return (Boolean) Class
+                    .forName("com.intellij.openapi.project.NoAccessDuringPsiEvents")
+                    .getMethod("isInsideEventProcessing")
+                    .invoke(null);
+        } catch (ClassNotFoundException e) {
+            return false;
+        } catch (NoSuchMethodException e) {
+            return false;
+        } catch (IllegalAccessException e) {
+            return false;
+        } catch (InvocationTargetException e) {
+            return false;
+        }
     }
 }