Basil as a weed?

cross-posted from: https://sh.itjust.works/post/226623

I was removing weeds from between the tiles in my garden and found what looks like basil. In autumn I usually let by basil flower before the first frost kills it. I think one of the seeds survived the winter. I didn't know basil seeds were so resilient. I let this one live (until I turn it into pesto).