Demolish can kill invincible turrets in Practice tool

[GAMEPLAY] If champions with demolish can damage invulnerable turrets in the practice tool. The towers will take damage when demolish procs.

1. Start a game of Practice Tool with the rune "Demolish" equipped.

2. Activate "Invincible Turrets".

3. Walk up to a turret and use demolish on it.

I ran into this today while fast forwarding time and trying to wait for manamune to stack on my autos with Urgot, and found that MisterManiac123 reported it a while back on the EUW forums

This is a problem that I think should be addressed for 2 reasons:

1. If you want to try a manamune build on Urgot, the easiest way to do it tends to be to give yourself and turrets invulnerability then fast forward while auto-attacking a tower with W. If you happen to have demolish in your runepage you'll eventually kill the turret with this method. This is more of a minor inconvenience that's specific to playing Urgot since most champions don't attack while you fast forward.

2. Bots run demolish. If you're trying to practice with a bot in your game (Garen bot specifically caused this issue for me, and I find him useful for testing against tank items), it can push up to your nexus while you're trying to stack, which is pretty annoying. I'm sure there are other reasons this could break people's practice too.

I was able to reproduce it easily with 100% success with a mundo bot and running demolish on Garen myself, so I would guess that the bug is specific to the rune. I think reason 2 is the more annoying one that could use fixing. Although I know the practice tool is low-priority it would be nice to see this fixed with the next batch of changes to it.