[asm-cherry-pick] Associate LabelNodes with their corresponding label

It looks like this is a bugfix that should be handed upstream.

Originally added in
lrytz/scala@2458576

Author: lrytz

src/main/java/scala/tools/asm/tree/MethodNode.java

@@ -570,7 +570,10 @@ public void visitEnd() {
    */
   protected LabelNode getLabelNode(final Label label) {
     if (!(label.info instanceof LabelNode)) {
-      label.info = new LabelNode();
+      // Patch in scala-asm: changed `new LabelNode()` to `new LabelNode(l)`
+      // TODO: check if this can go upstream, or if it is still discouraged
+      // https://mail.ow2.org/wws/arc/asm/2011-07/msg00032.html
+      label.info = new LabelNode(label);
     }
     return (LabelNode) label.info;
   }