fresh prune with out-of-sync wallet can fail (but shouldn't) #6345

If you restart a non pruned full node with -prune=550 (to enable pruning), while having a wallet which is not in sync (maybe you copied it), the node will first prune, than complain about a impossible rescan (see below). IMO before pruning all old blocks, the node should firs try to sync the wallet.

Prune: UnlinkPrunedFiles deleted blk/rev (00263)
Prune: UnlinkPrunedFiles deleted blk/rev (00264)
Prune: UnlinkPrunedFiles deleted blk/rev (00265)
Prune: UnlinkPrunedFiles deleted blk/rev (00266)
Prune: UnlinkPrunedFiles deleted blk/rev (00267)
Prune: UnlinkPrunedFiles deleted blk/rev (00268)
Prune: UnlinkPrunedFiles deleted blk/rev (00269)
Prune: UnlinkPrunedFiles deleted blk/rev (00270)
Prune: UnlinkPrunedFiles deleted blk/rev (00271)
Prune: UnlinkPrunedFiles deleted blk/rev (00272)
Prune: UnlinkPrunedFiles deleted blk/rev (00273)
Prune: UnlinkPrunedFiles deleted blk/rev (00274)
Prune: UnlinkPrunedFiles deleted blk/rev (00275)
Prune: UnlinkPrunedFiles deleted blk/rev (00276)
Prune: UnlinkPrunedFiles deleted blk/rev (00277)
Prune: UnlinkPrunedFiles deleted blk/rev (00278)
Prune: UnlinkPrunedFiles deleted blk/rev (00279)
Prune: UnlinkPrunedFiles deleted blk/rev (00280)
Prune: UnlinkPrunedFiles deleted blk/rev (00281)
Prune: UnlinkPrunedFiles deleted blk/rev (00282)
Prune: UnlinkPrunedFiles deleted blk/rev (00283)
Prune: UnlinkPrunedFiles deleted blk/rev (00284)
Prune: UnlinkPrunedFiles deleted blk/rev (00285)
init message: Loading wallet...
nFileVersion = 119900
Keys: 102 plaintext, 0 encrypted, 102 w/ metadata, 102 total
 wallet                  772ms
Error: Prune: last wallet synchronisation goes beyond pruned data. You need to -reindex (download the whole blockchain again in case of pruned node)
Error: Prune: last wallet synchronisation goes beyond pruned data. You need to -reindex (download the whole blockchain again in case of pruned node)

Fix pushed. It's a bit of an edge case, but I imagine it's really annoying.