How to replicate:

Enter this room, start from the very bottom left of the room and begin running full speed. Face up right and begin shooting as fast as you can, it'll crash.
Error:
############################################################################################
ERROR in action number 1
of Step Event0 for object obj_Projectile:
Data structure with index does not exist.
at gml_Script_entity_position_collide@gml_Object_obj_Entity_Create_0
############################################################################################
gml_Script_entity_position_collide@gml_Object_obj_Entity_Create_0 (line -1)
gml_Object_obj_Projectile_Step_0
gml_Object_obj_Beam_Step_0 (line -1)
How to replicate:
Enter this room, start from the very bottom left of the room and begin running full speed. Face up right and begin shooting as fast as you can, it'll crash.
Error:
############################################################################################
ERROR in action number 1
of Step Event0 for object obj_Projectile:
Data structure with index does not exist.
at gml_Script_entity_position_collide@gml_Object_obj_Entity_Create_0
############################################################################################
gml_Script_entity_position_collide@gml_Object_obj_Entity_Create_0 (line -1)
gml_Object_obj_Projectile_Step_0
gml_Object_obj_Beam_Step_0 (line -1)