Fixed #1772 AS1/2 decompilation - StackOverflow during getVariables function

CHANGELOG.md

@@ -16,6 +16,7 @@ All notable changes to this project will be documented in this file.
 - Uncompressed FLA (XFL) export creates a directory
 - [#1827] Video replacing VP6 reading
 - [#1926] Constructors namespace taken from class - should be always public
+- [#1772] AS1/2 decompilation - StackOverflow during getVariables function
 
 ### Changed
 - [#1913] SVG export/import of shapes - shape exact position (bounds) is retained
@@ -2832,6 +2833,7 @@ All notable changes to this project will be documented in this file.
 [#1923]: https://www.free-decompiler.com/flash/issues/1923
 [#1827]: https://www.free-decompiler.com/flash/issues/1827
 [#1926]: https://www.free-decompiler.com/flash/issues/1926
+[#1772]: https://www.free-decompiler.com/flash/issues/1772
 [#1922]: https://www.free-decompiler.com/flash/issues/1922
 [#1921]: https://www.free-decompiler.com/flash/issues/1921
 [#1917]: https://www.free-decompiler.com/flash/issues/1917

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/Action.java

@@ -999,7 +999,7 @@ public abstract class Action implements GraphSourceItem {
     }
 
     private static HashMap<String, GraphTargetItem> prepareVariables(GraphSourceItemContainer cnt, HashMap<String, GraphTargetItem> variables) {
-        HashMap<String, GraphTargetItem> variables2 = Helper.deepCopy(variables);
+        HashMap<String, GraphTargetItem> variables2 = new LinkedHashMap<>(variables);
         if (cnt instanceof ActionDefineFunction || cnt instanceof ActionDefineFunction2) {
             for (int r = 0; r < 256; r++) {
                 if (variables2.containsKey("__register" + r)) {

libsrc/ffdec_lib/src/com/jpexs/helpers/Helper.java

@@ -660,7 +660,10 @@ public class Helper {
         } catch (IOException | ClassNotFoundException ex) {
             Logger.getLogger(Helper.class.getName()).log(Level.SEVERE, "Copy error", ex);
             return null;
+        } catch (StackOverflowError se) {
+            throw new StackOverflowError("Stack overflow in deepcopy");
         }
+        
     }
 
     public static List<Object> toList(Object... rest) {