# A field-injected collaborator used in the constructor

context started: false
top exception  : org.springframework.beans.factory.BeanCreationException
top message    : Error creating bean with name 'fieldTrapService': Failed to instantiate [com.ankurm.coredi.injection.FieldTrapService]: Constructor threw exception
root cause     : java.lang.NullPointerException: Cannot invoke "com.ankurm.coredi.injection.PaymentGateway.charge(String, int)" because "this.gateway" is null