No, and there are risks on both sides of that call. Prison and jail phone calls are recorded and monitored. Every number an inmate calls, and every conversation on those calls, is logged and available to law enforcement. Calling someone with an active warrant creates a documented connection between the inmate and a person who is currently wanted, which is the kind of detail that prosecutors and investigators pay attention to.
For the inmate, regular contact with someone who is a wanted fugitive can raise questions about their associations, complicate their case if it is still ongoing, or create issues at a parole or classification review. Facilities also have rules against contact with known felons, and while that typically applies to in-person visitation, the same logic informs how phone contact is evaluated.
For the person with the warrant, being on an inmate's call list and appearing in recorded prison calls is not a situation that helps them avoid law enforcement attention.
The short version is that this is a relationship better maintained through letters, which carry their own risks but are less immediately traceable in real time, or better yet, deferred until the warrant situation is resolved. Taking unnecessary risks on either side of a prison phone call is rarely worth it.