ADDITIONAL SYSTEM INFORMATION :
javac 11.0.1

A DESCRIPTION OF THE PROBLEM :
The offset for annotation on cast is wrongly on the instruction which follows checkcast if the cast is on an expression

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
javap the compiled source code

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
   stack=1, locals=3, args_size=3
         0: iload_0
         1: ifeq 8
         4: aload_1
         5: goto 9
         8: aload_2
         9: checkcast #2 // class java/lang/String
        12: areturn
.....
      RuntimeVisibleTypeAnnotations:
        0: #21(): CAST, offset=9, type_index=0
          TypeUse
}
ACTUAL -
   stack=1, locals=3, args_size=3
         0: iload_0
         1: ifeq 8
         4: aload_1
         5: goto 9
         8: aload_2
         9: checkcast #2 // class java/lang/String
        12: areturn
....
      RuntimeVisibleTypeAnnotations:
        0: #21(): CAST, offset=12, type_index=0
          TypeUse
}

---------- BEGIN SOURCE ----------
@Target(ElementType.TYPE_USE)
@Retention(RetentionPolicy.RUNTIME)
public @interface TypeUse {}

public class AnnotateCast {
    private static String checkcast(boolean test,Object obj,Object obj2) {
            return (@TypeUse String)(test?obj:obj2);
    }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Object obj1 = test?obj:obj2;
 return (@TypeUse String)obj1;
/* placing brackets round obj1 reproduces the problem */

FREQUENCY : occasionally