qBot-xp tries to get position for empty unitCollection

[Deiz]

As I'm fairly unfamiliar with the AI code I can't provide much insight. All I know is that this.position is defined at attack_plan.js:516:

this.position = this.unitCollection.getCentrePosition();

It seems logical that for this.position to be undefined, the unitCollection must be empty. As with most AI errors, it tends to cause severe slowdowns.

ERROR: JavaScript error: simulation/ai/common-api-v2/utils.js line 10
TypeError: a is undefined
  SquareVectorDistance((void 0),[object Array])@simulation/ai/common-api-v2/utils.js:10
  ([object Object],[object Object],[object Array])@simulation/ai/qbot-wc/attack_plan.js:626
  ([object Object],[object Object],[object Array])@simulation/ai/qbot-wc/military.js:590
  ()@simulation/ai/qbot-wc/qbot.js:132
  ([object Object])@simulation/ai/common-api-v2/base.js:147
  @:0

[wraitii]

I'll give a look at that, should be an easy fix.

[wraitii]

In 12531:

Check the length of the unit collection in started attack plans to avoid errors. Fixes #1620