Fix bridge uniqueness

Author: Gaming32

src/main/java/net/raphimc/javadowngrader/transformer/DowngradingTransformer.java

@@ -33,6 +33,8 @@
 
 public abstract class DowngradingTransformer {
 
+    private static final String BRIDGE_PREFIX = "javadowngrader-bridge$";
+
     private final int sourceVersion;
     private final int targetVersion;
 
@@ -75,6 +77,11 @@ public void transform(final ClassNode classNode) {
         this.preTransform(classNode);
 
         int bridge = 100;
+        for (final MethodNode methodNode : classNode.methods) {
+            if (methodNode.name.startsWith(BRIDGE_PREFIX)) {
+                bridge = Integer.parseInt(methodNode.name.substring(BRIDGE_PREFIX.length())) + 1;
+            }
+        }
 
         if (!this.methodCallReplacers.isEmpty()) {
             for (MethodNode methodNode : new ArrayList<>(classNode.methods)) {
@@ -107,7 +114,7 @@ public void transform(final ClassNode classNode) {
                                     final String desc = handle.getTag() == Opcodes.H_INVOKESTATIC || handle.getTag() == Opcodes.H_GETSTATIC || handle.getTag() == Opcodes.H_PUTSTATIC
                                         ? handle.getDesc()
                                         : "(L" + handle.getOwner() + ';' + handle.getDesc().substring(1);
-                                    final MethodNode bridgeMethod = new MethodNode(Opcodes.ACC_PRIVATE | Opcodes.ACC_STATIC | Opcodes.ACC_SYNTHETIC, "javadowngrader-bridge$" + (bridge++), desc, null, null);
+                                    final MethodNode bridgeMethod = new MethodNode(Opcodes.ACC_PRIVATE | Opcodes.ACC_STATIC | Opcodes.ACC_SYNTHETIC, BRIDGE_PREFIX + (bridge++), desc, null, null);
                                     final Type[] argumentTypes = Type.getArgumentTypes(desc);
                                     for (int i1 = 0; i1 < argumentTypes.length; i1++) {
                                         bridgeMethod.instructions.add(new VarInsnNode(argumentTypes[i1].getOpcode(Opcodes.ILOAD), i1));