cglib/src/main/java/net/sf/cglib/core/CodeEmitter.java
void emit_field(int opcode, Type ctype, String name, Type ftype) {
        mv.visitFieldInsn(opcode,
                          ctype.getInternalName(),
                          name,
                          ftype.getDescriptor());
    }
void emit_field(int opcode, Type ctype, String name, Type ftype) {
        mv.visitFieldInsn(opcode,
                          ctype.getInternalName(),
                          name,
                          ftype.getDescriptor());
    }
package-protected for EmitUtils, try to fix