In class that i modifying there is non referenced constant pool entries and krakatau skips it, but they are actually used through getting from ConstantPool on runtime
You can use raw reference syntax (e.g. .const [4] = Long 12312312 ) to force creation of a constant pool entry at a particular index. If you disassemble a class in roundtrip mode, it will do this automatically.
In class that i modifying there is non referenced constant pool entries and krakatau skips it, but they are actually used through getting from ConstantPool on runtime