Check referencing instance variables from static context.

src/com/jpexs/decompiler/flash/gui/abc/ABCPanel.java

@@ -1240,6 +1240,9 @@ public class ABCPanel extends JPanel implements ItemListener, SearchListener<Scr
         Reference<Integer> multinameIndexRef = new Reference<>(0);
         Reference<Boolean> classTrait = new Reference<>(false);
         Reference<ABC> usedAbcRef = new Reference<>(null);
+        if (getSwf() == null) {
+            return false;
+        }
         if (decompiledTextArea.getPropertyTypeAtPos(getSwf().getAbcIndex(), pos, abcIndex, classIndex, traitIndex, classTrait, multinameIndexRef, usedAbcRef)) {
             return true;
         }

src/com/jpexs/decompiler/flash/gui/abc/UsageFrame.java

@@ -156,8 +156,8 @@ public class UsageFrame extends AppDialog implements MouseListener {
             };
 
             Main.getMainFrame().getPanel().setLoadingScrollPosEnabled(false);
-            if (decompiledTextArea.getScriptIndex() == icu.getScriptIndex() &&
-                    (decompiledTextArea.getClassIndex() == icu.getClassIndex() || icu.getClassIndex() == -1) && abcPanel.abc == newAbc) {
+            if (decompiledTextArea.getScriptIndex() == icu.getScriptIndex() 
+                    && (decompiledTextArea.getClassIndex() == icu.getClassIndex() || icu.getClassIndex() == -1) && abcPanel.abc == newAbc) {
                 setTrait.run();
             } else {
                 decompiledTextArea.addScriptListener(setTrait);

src/com/jpexs/decompiler/flash/gui/editor/LineMarkedEditorPane.java

@@ -362,11 +362,7 @@ public class LineMarkedEditorPane extends UndoFixedEditorPane implements LinkHan
             return t;
         }
         return null;
-    }
-    
-    public Token getTokenUnderCursor() {
-        return tokenAtPos(lastCursorPos);
-    }
+    }    
    
 
     public void setLinkHandler(LinkHandler linkHandler) {

src/com/jpexs/decompiler/flash/gui/editor/VariableMarker.java

@@ -491,7 +491,7 @@ public class VariableMarker implements SyntaxComponent, CaretListener, PropertyC
 
     private void editorMouseMoved(MouseEvent e) {
         if (pane instanceof LineMarkedEditorPane) {
-            Token token = ((LineMarkedEditorPane) pane).getTokenUnderCursor();
+            Token token = ((LineMarkedEditorPane) pane).tokenAtPos(e.getPoint());
             if (token != null) {
                 String err = errors.get(token.start);
                 pane.setToolTipText(err);