Bug report: if you ascend while block breaking is active, it will remain active post-ascension, including before you actually purchase the block breaking upgrade. In this state it appears to be fully functional, including allowing you to accrue stone by breaking blocks, and then spend it on things such as Tier 2 Prestige (and, I'm guessing, the stone upgrades, though I haven't gotten that far in this ascension yet).
It's a fairly useless bug, given by the time you're in a position to exploit it, you're also in a position to very quickly purchase the block breaking upgrade anyways, but it's neat in its own right.
 "Block Fuser"){kind=icon}