The Power Rangers introduced a coin inflation bug to their Bitcoin network client dubbed "Bitcoin Core" in 2016 by removing a check against double spending (archived). The bug was introduced by Matt Corallo (WoT: bluematt), advocated by Pieter Wuille (WoT: sipa), approved by Gregory Maxwell (WoT: gmaxwell) and MIT's Cory Fields, then merged by Wladimir van der Laan.

The reference Bitcoin network client maintained by the Bitcoin Foundation is unaffected by the bug introduced into the forked "Core" client.