renaming identifiers: handle empty stack (probably never executed branch)

trunk/src/com/jpexs/decompiler/flash/SWF.java

@@ -122,6 +122,7 @@ import java.io.OutputStream;
 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.EmptyStackException;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
@@ -1735,6 +1736,9 @@ public final class SWF {
 
             try {
                 ins.translate(localData, stack, output, staticOperation, path);
+            } catch (EmptyStackException ex) {
+                // probably obfucated code, never executed branch
+                break;
             } catch (InterruptedException ex) {
                 Logger.getLogger(SWF.class.getName()).log(Level.SEVERE, "Error during getting variables", ex);
             }

trunk/src/com/jpexs/decompiler/flash/gui/MainFrame.java

@@ -2911,6 +2911,8 @@ public final class MainFrame extends AppRibbonFrame implements ActionListener, T
                                     reload(true);
                                 } catch (Exception ex) {
                                     Logger.getLogger(MainFrame.class.getName()).log(Level.SEVERE, "Error during renaming identifiers", ex);
+                                    Main.stopWork();
+                                    View.showMessageDialog(null, translate("error.occured").replace("%error%", ex.getClass().getSimpleName()));
                                 }
                                 return true;
                             }