Typical test failure of GenericsTest due to incorrect method signature.

vmOpts: '-Xmx512m -XX:MaxRAMPercentage=6 -ea -esa'
javaOpts: '-XX:+CreateCoredumpOnCrash -XX:+UnlockExperimentalVMOptions -XX:+UseZGC'
JVM version:15-valhalla
JDI version: 15.0
JVM description: Java Debug Interface (Reference Implementation) version 15.0
Java Debug Wire Protocol (Reference Implementation) version 15.0
JVM Debug Interface version 15.0
JVM version 15-valhalla (Java HotSpot(TM) 64-Bit Server VM, mixed mode)
Gen1<tt> ctor called
Gen1<tt> ctor called
strArray name = GenericsTarg.strArray
         type = array class java.lang.String[] (no class loader)
          sig = [Ljava/lang/String;
       genSig = null
intField name = GenericsTarg.intField
         type = int
          sig = I
genField name = GenericsTarg.genField
         type = class Gen1 (loaded by instance of jdk.internal.loader.ClassLoaders$AppClassLoader(id=62))
          sig = LGen1;
       genSig = <tt:Ljava/lang/Object;>Ljava/lang/Object;Ljava/lang/IdentityObject;
field1 name = Gen1.field1
       type = LGen1;
        sig = Ljava/lang/Object;
    gen sig = Ttt;
method1 name = Gen1.method1(java.lang.Object)
        type = LGen1;
         sig = (Ljava/lang/Object;)Ljava/lang/Object;
     gen sig = (Ttt;)Ttt;
     bridge = false
   local var 0 = p1
      sig = Ljava/lang/Object;
      gen sig = Ttt;
   local var 1 = xxx
      sig = LGen1;
      gen sig = LGen1<Ljava/lang/String;>;
method2 name = Gen1.method2()
        type = LGen1;
         sig = ()Ljava/lang/String;
     gen sig = null
     bridge = false
   local var 0 = str
      sig = Ljava/lang/String;
      gen sig = null
method is: Sub1.method1(java.lang.String)
method is: Sub1.method1(java.lang.Object)

method1 name = Sub1.method1(java.lang.Object)
         sig = (Ljava/lang/Object;)Ljava/lang/Object;
      bridge = true
Goodbye from GenericsTarg!