Non-variadic functions clashing with variadic functions are erroneously invoked

[purplesyringa]

Vineflower version

1.11.1

Describe the bug

// outputs "variadic"
class Test {
    public static void main(String[] args) {
        overloaded(new Object[]{"arg"});
    }

    static void overloaded(Object o) {
        System.out.println("non-variadic");
    }

    static void overloaded(Object... o) {
        System.out.println("variadic");
    }
}

decompiles to

// outputs "non-variadic"
class Test {
   public static void main(String[] var0) {
      overloaded("arg");
   }

   static void overloaded(Object var0) {
      System.out.println("non-variadic");
   }

   static void overloaded(Object... var0) {
      System.out.println("variadic");
   }
}

which invokes the wrong overload.

[purplesyringa]

Bonus content: misdecompilation in another direction!

// outputs: "non-variadic"
class Test {
    public static void main(String[] args) {
        overloaded((Object)null);
    }

    static void overloaded(Object o) {
        System.out.println("non-variadic");
    }

    static void overloaded(Object... o) {
        System.out.println("variadic");
    }
}

decompiles to

// outputs: "variadic"
class Test {
   public static void main(String[] var0) {
      overloaded(null);
   }

   static void overloaded(Object var0) {
      System.out.println("non-variadic");
   }

   static void overloaded(Object... var0) {
      System.out.println("variadic");
   }
}

with a warning that explains the problem

test.java:3: warning: non-varargs call of varargs method with inexact argument type for last parameter;
      overloaded(null);
                 ^
  cast to Object for a varargs call
  cast to Object[] for a non-varargs call and to suppress this warning
1 warning

Though this one also reproduces when Object... is replaced with Object[], except that the compiler doesn't even emit a warning.