Fix EDU-571 Project is already disposed

diff --git a/python/educational-core/student/src/com/jetbrains/edu/learning/StudyUtils.java b/python/educational-core/student/src/com/jetbrains/edu/learning/StudyUtils.java
index 82df5b47bd408519aa2394863647608a94489b41..092ce8f2a52ca3dd4eb26d9eccc0dcd5c2b78476 100644 (file)
--- a/python/educational-core/student/src/com/jetbrains/edu/learning/StudyUtils.java
+++ b/python/educational-core/student/src/com/jetbrains/edu/learning/StudyUtils.java
@@ -194,6 +194,8 @@ public class StudyUtils {
 
   @Nullable
   public static StudyToolWindow getStudyToolWindow(@NotNull final Project project) {
+    if (project.isDisposed()) return null;
+    
     ToolWindow toolWindow = ToolWindowManager.getInstance(project).getToolWindow(StudyToolWindowFactory.STUDY_TOOL_WINDOW);
     if (toolWindow != null) {
       Content[] contents = toolWindow.getContentManager().getContents();