Really fun to see a new Angband variant in this day and age and I wish you luck in development! I think your game is going to kill me in a horrible, unexpected way after a hunter dropped a Ring of Speed (+5) for me on the very first level of the town dungeon...
I've seen the comments here, and your mention in the readme, about "*" target selection. If it helps, I have a savefile that can immediately reproduce a crash in V.9, but I guess you may already know enough about the problem to not need it.
Though "c to target closest" is alright in most cases, as a spellcaster there are still times when it's highly useful to target a particular square or monster (e.g. when casting AoE ball spells, like Breathing Fumes, or Stinking Cloud in vanilla). I can understand it may be a thorny problem but... any chance you could take one last look at this?
If not, maybe the ability to enter target selection should be completely prevented, rather than still being available but with no obvious mention of it, as is currently the case. Sadly that means a degree of unfairness when monsters can target you, but you may not be able to target them back.
