Fixed: #2486 decompilation timeout on infinite loop

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/AVM2Code.java

@@ -3652,6 +3652,13 @@ public class AVM2Code implements Cloneable {
                     cnt++;
                 }
             }
+            if ((ins.definition instanceof LabelIns) || (ins.definition instanceof DebugLineIns)) {                
+                ins.setIgnored(true, 0);
+                if (minChangedIp == -1 || minChangedIp > i) {
+                    minChangedIp = i;
+                }
+                cnt++;
+            }
         }
 
         removeIgnored(body);
@@ -3660,6 +3667,25 @@ public class AVM2Code implements Cloneable {
 
         return cnt;
     }
+    
+    /**
+     * Removes label and debugline instructions
+     * @param body Method body
+     * @return Number of removed instructions
+     * @throws InterruptedException 
+     */
+    public int removeLabelsAndDebugLine(MethodBody body) throws InterruptedException {        
+        int cnt = 0;
+        for (int i = code.size() - 1; i >= 0; i--) {
+            AVM2Instruction ins = code.get(i);            
+            if ((ins.definition instanceof LabelIns) || (ins.definition instanceof DebugLineIns)) {                
+                ins.setIgnored(true, 0);
+                cnt++;
+            }
+        }
+        removeIgnored(body);       
+        return cnt;
+    }
 
     /**
      * Replaces jumps to exit instructions (return, throw) with exit

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/graph/AVM2Graph.java

@@ -3263,39 +3263,5 @@ public class AVM2Graph extends Graph {
         }
 
         return ternar;
-    }
-
-    @Override
-    protected int checkIp(int ip) {
-        if (true) {
-            //return ip;
-        }
-        /*
-        Ignore label instructions
-        
-        <pre>
-        locA:
-            label
-        locB:
-            pushbyte 1
-        
-        =>
-        
-        locAB: 
-            pushbyte 1
-        </pre>
-         */
-        while (ip < code.size()) {
-            GraphSourceItem ins = code.get(ip);
-            if (!(ins instanceof AVM2Instruction)) {
-                break;
-            }
-            AVM2Instruction ains = (AVM2Instruction) ins;
-            if (!(ains.definition instanceof LabelIns)) {
-                break;
-            }
-            ip++;
-        }
-        return ip;
-    }
+    }   
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/types/MethodBody.java

@@ -631,6 +631,7 @@ public final class MethodBody implements Cloneable {
         if (deobfuscate) {
             try {
                 code.removeTraps(trait, method_info, body, abc, scriptIndex, classIndex, isStatic, path);
+                code.removeLabelsAndDebugLine(body);
             } catch (ThreadDeath | InterruptedException ex) {
                 throw ex;
             } catch (Throwable ex) {

libsrc/ffdec_lib/src/com/jpexs/decompiler/graph/Graph.java

@@ -4125,6 +4125,9 @@ public class Graph {
                 }
 
                 GraphPart nextPart = part.nextParts.get(0);
+                if (nextPart == part) {
+                    continue;
+                }
 
                 for (GraphPart r : part.refs) {
                     while (true) {