Fix IDE history when exception thrown (forward)

platform/platform-impl/src/com/intellij/openapi/fileEditor/impl/IdeDocumentHistoryImpl.java

@@ -355,13 +355,16 @@ public class IdeDocumentHistoryImpl extends IdeDocumentHistory implements Projec
     if (target == null) return;
 
     myForwardInProgress = true;
-    executeCommand(new Runnable() {
-      @Override
-      public void run() {
-        gotoPlaceInfo(target);
-      }
-    }, "", null);
-    myForwardInProgress = false;
+    try {
+      executeCommand(new Runnable() {
+        @Override
+        public void run() {
+          gotoPlaceInfo(target);
+        }
+      }, "", null);
+    } finally {
+      myForwardInProgress = false;
+    }
   }
 
   private PlaceInfo getTargetForwardInfo() {