Crash when casting Verdant Spheres triggering Fury Swipes

If your game crashes, please copy and paste the full error message below, or post a screenshot of it.


############################################################################################
FATAL ERROR in
action number 1
of Step Event0
for object obj_battlecontroller:

Push :: Execution Error - Variable Index [0,-1] out of range [1,13] - -5.creatureList(100003,-1)
at gml_Script_bc_CreatureCast
############################################################################################

stack frame is
gml_Script_bc_CreatureCast (line 0)
gml_Script_bc_CreatureCastSpellGem
gml_Script_bc_CreatureCast
gml_Script_bc_SpellsOnHit
gml_Script_bc_OnDodge
gml_Script_bc_CreatureAttack
gml_Script_bc_ExecuteEvents
gml_Object_obj_battlecontroller_Step_0

Please describe in as much detail as possible how to reproduce the bug or crash.

I was fighting in the arena. I had my Medusa (in position 6) cast Verdant Spheres. It triggered a cast of Fury Swipes. The game crashed with the “cast Fury Swipes.” text.

What operating system are you playing the game on?

Windows 10

What game version are you playing?

Version 2.1.2.