AI can use one creature to attack multiple targets (player and planeswalkers)

[copperfield42]

the AI was able to declare attack with the same creature as it were multiple creatures an attacked all my Chandras and when I blocked only one of those multiples attack was blocked

07:20 PM: Turn 41 Computer 3 (34 - -2 - 40 - 7)
07:20 PM, T41.UN: Computer 3 untapped Kalemne, Disciple of Iroas [dca]
07:20 PM, T41.DR: Computer 3 draws a card
07:20 PM, T41.M1: Computer 3 activates: Equip. from Loxodon Warhammer [169] targeting Kalemne, Disciple of Iroas [dca]
07:20 PM, T41.M1: Computer 3 plays Mountain [751]
07:20 PM, T41.M1: Computer 3 puts Mountain [751] from hand onto the Battlefield
07:20 PM, T41.DA: Computer 3 attacks with 3 creatures
07:25 PM, T41.DB: Attacked player: copperfield
07:25 PM, T41.DB: Attacker: Kalemne, Disciple of Iroas [dca] (6/3) blocked by Dragon Egg [056] (0/2) Dragon Egg [1be] (0/2) Dragon Egg [3df] (0/2) Dragon Egg [87e] (0/2) Dragon Egg [f64] (0/2) Goblin [c50] (1/1) Goblin [307] (1/1) Goblin [dfb] (1/1) 
07:25 PM, T41.DB: Attacker: Kalemne, Disciple of Iroas [dca] (6/3) unblocked
07:25 PM, T41.DB: Attacker: Kalemne, Disciple of Iroas [dca] (6/3) unblocked
07:25 PM, T41.FCD: Kalemne, Disciple of Iroas [dca] deals 6 damage to Chandra, Bold Pyromancer [9da]
07:25 PM, T41.FCD: Kalemne, Disciple of Iroas [dca] deals 6 damage to Chandra, Flame's Fury [54e]
07:25 PM, T41.FCD: Computer 3 gains 18 life
07:25 PM, T41.FCD: Kalemne, Disciple of Iroas [dca] deals 2 damage to Dragon Egg [056]
07:25 PM, T41.FCD: Kalemne, Disciple of Iroas [dca] deals 2 damage to Dragon Egg [1be]
07:25 PM, T41.FCD: Kalemne, Disciple of Iroas [dca] deals 2 damage to Dragon Egg [3df]
07:25 PM, T41.FCD: Chandra, Bold Pyromancer [9da] is put into graveyard from battlefield
07:25 PM, T41.FCD: Chandra, Flame's Fury [54e] is put into graveyard from battlefield
07:25 PM, T41.FCD: Dragon Egg [1be] died
07:25 PM, T41.FCD: Dragon Egg [3df] died
07:25 PM, T41.FCD: Dragon Egg [056] died
07:25 PM, T41.CD: Kalemne, Disciple of Iroas [dca] deals 1 damage to Goblin [307]
07:25 PM, T41.CD: Kalemne, Disciple of Iroas [dca] deals 2 damage to Dragon Egg [87e]
07:25 PM, T41.CD: Kalemne, Disciple of Iroas [dca] deals 1 damage to Goblin [c50]
07:25 PM, T41.CD: Kalemne, Disciple of Iroas [dca] deals 2 damage to Dragon Egg [f64]
07:25 PM, T41.CD: Computer 3 gains 6 life
07:25 PM, T41.CD: Dragon Egg [87e] died
07:25 PM, T41.CD: Goblin [307] died
07:25 PM, T41.CD: Kalemne, Disciple of Iroas [dca] died
07:25 PM, T41.CD: Dragon Egg [f64] died
07:25 PM, T41.CD: Goblin [c50] died
07:25 PM, T41.CD: Computer 3 puts Kalemne, Disciple of Iroas [dca] from exile zone to his or her command zone
07:25 PM, T41.CD: Goblin [dfb] deals 3 damage to Kalemne, Disciple of Iroas [dca]
07:25 PM, T41.CD: Goblin [307] deals 3 damage to Kalemne, Disciple of Iroas [dca]
07:25 PM, T41.CD: Goblin [c50] deals 3 damage to Kalemne, Disciple of Iroas [dca]

[copperfield42]

It happens again, this time attacking another player and my planeswalker, and I couldn't block it

[JayDi85]

Is that a rare bug or it appears in all AI games?

[JayDi85]

It can be related to the changes from a7e1c501224d16939170a6537ade84c0c490c8a1 (and later commits) about AI and planeswalker attacks. I don't check current code but first commit version allows attack multiple planeswalkers by one creature. And your screenshots shows planeswalker attacks too.

Maybe @jeffwadsworth can review that code for more details.

[copperfield42]

Is that a rare bug or it appears in all AI games?

is rare, the screenshot I show are the only times I watched this bug, I had planeswalker out in other occasions and that didn't happens

[copperfield42]

Here is another sample, this time 2 creatures are doing the multi-attack

is a little interesting that it trigger Circle of Flames multiple times

[copperfield42]

another sample

there seem to be a correlation with the ability of vigilance and this bug

[jeffwadsworth]

I will test the Vigilance thing because I have never seen this bug during playtesting. Hopefully, that is the weird link.

[Alex-Vasile]

Another reported occurance:

[JayDi85]

Multiple targets attack by AI fixed in e4157fefb8d924cbf014534753e13c288d2d902f. Real reason was in miss attacking status, see previous comments https://github.com/magefree/mage/issues/7434#issuecomment-774707516.