Failed to obtain reader, failed to marshal fields to JSON, json: unsupported type: func() error

[shklae]

The following error is generated while trying to log.WithField cmd variable (of type https://pkg.go.dev/os/exec#Cmd)
Failed to obtain reader, failed to marshal fields to JSON, json: unsupported type: func() error

https://github.com/smart-edge-open/sriov-fec-operator/blob/6be4a1f78d468bd9b07821468c577e8b0873a7be/pkg/daemon/common.go#L29

The issue has started since the Cancel func() error field was added to the Cmd type