Use consistent exceptions in visitLabel.

asm-util/src/main/java/org/objectweb/asm/util/CheckMethodAdapter.java

@@ -784,7 +784,7 @@ public class CheckMethodAdapter extends MethodVisitor {
     checkVisitMaxsNotCalled();
     checkLabel(label, false, "label");
     if (labelInsnIndices.get(label) != null) {
-      throw new IllegalArgumentException("Already visited label");
+      throw new IllegalStateException("Already visited label");
     }
     labelInsnIndices.put(label, insnCount);
     super.visitLabel(label);

asm-util/src/test/java/org/objectweb/asm/util/CheckMethodAdapterTest.java

@@ -595,7 +595,7 @@ public class CheckMethodAdapterTest extends AsmTest implements Opcodes {
 
     Executable visitLabel = () -> checkMethodAdapter.visitLabel(label);
 
-    Exception exception = assertThrows(IllegalArgumentException.class, visitLabel);
+    Exception exception = assertThrows(IllegalStateException.class, visitLabel);
     assertEquals("Already visited label", exception.getMessage());
   }