fixed after IDEA-CR-5228

python/src/com/jetbrains/python/module/PyContentEntriesEditor.java

@@ -50,14 +50,14 @@ public class PyContentEntriesEditor extends CommonContentEntriesEditor {
   private final Module myModule;
   private Disposable myFilePointersDisposable;
   private MyContentEntryEditor myContentEntryEditor;
-  private FacetErrorPanel myErrorPanel;
+  private FacetErrorPanel myWarningPanel;
 
   public PyContentEntriesEditor(Module module, ModuleConfigurationState moduleConfigurationState,
                                       JpsModuleSourceRootType<?>... rootTypes) {
     super(module.getName(), moduleConfigurationState, rootTypes);
     myRootTypeProviders = Extensions.getExtensions(PyRootTypeProvider.EP_NAME);
     myModule = module;
-    myErrorPanel = new FacetErrorPanel();
+    myWarningPanel = new FacetErrorPanel();
     reset();
   }
 
@@ -105,6 +105,10 @@ public class PyContentEntriesEditor extends CommonContentEntriesEditor {
     if (myFilePointersDisposable != null) {
       Disposer.dispose(myFilePointersDisposable);
     }
+
+    for (PyRootTypeProvider provider : myRootTypeProviders) {
+      provider.disposeUIResources(myModule);
+    }
   }
 
   @Override
@@ -292,10 +296,10 @@ public class PyContentEntriesEditor extends CommonContentEntriesEditor {
 
   @Override
   protected void addAdditionalSettingsToPanel(JPanel mainPanel) {
-    mainPanel.add(myErrorPanel.getComponent(), BorderLayout.SOUTH);
+    mainPanel.add(myWarningPanel.getComponent(), BorderLayout.SOUTH);
   }
 
-  public FacetErrorPanel getErrorPanel() {
-    return myErrorPanel;
+  public FacetErrorPanel getWarningPanel() {
+    return myWarningPanel;
   }
 }

python/src/com/jetbrains/python/module/PyRootTypeProvider.java

@@ -48,7 +48,7 @@ public abstract class PyRootTypeProvider {
     }
   };
 
-  public abstract void reset(@NotNull final Disposable disposable, PyContentEntriesEditor editor, Module module);
+  public abstract void reset(@NotNull final Disposable disposable, PyContentEntriesEditor editor, @NotNull Module module);
 
   public abstract void apply(Module module);
 
@@ -76,6 +76,9 @@ public abstract class PyRootTypeProvider {
     return null;
   }
 
+  public void disposeUIResources(@NotNull Module module) {
+  }
+
 
   protected class RootEntryEditingAction extends ContentEntryEditingAction {
     private final Disposable myDisposable;
@@ -123,12 +126,12 @@ public abstract class PyRootTypeProvider {
 
   private void addRoot(VirtualFilePointer root, PyContentEntriesEditor editor) {
     editor.getContentEntryEditor().addRoot(this, root);
-    editor.getErrorPanel().getValidatorsManager().validate();
+    editor.getWarningPanel().getValidatorsManager().validate();
   }
 
   protected void removeRoot(VirtualFile selectedFile, PyContentEntriesEditor editor, ModifiableRootModel model) {
     editor.getContentEntryEditor().removeRoot(null, selectedFile.getUrl(), this);
-    editor.getErrorPanel().getValidatorsManager().validate();
+    editor.getWarningPanel().getValidatorsManager().validate();
   }
 
   protected boolean hasRoot(VirtualFile file, PyContentEntriesEditor editor) {