[Bug]: (IPC Medical Rework Testmerge) handle_burst_damage Runtime

[sadkermit]

Checks

• I have searched the bug with a few keywords, and I confirm this bug was not yet reported.

Location

Event / Other

Describe the issue

burst damaging an IPC doesn't apply damage effects due to a null owner variable

Stacktrace:

[2025-08-31 00:34:09.148] cBl-dyln RUNTIME: runtime error: Cannot read null.internal_organs_by_name
 - proc name: handle burst damage (/obj/item/organ/internal/machine/posibrain/proc/handle_burst_damage)
 -   source file: code/modules/organs/internal/species/machine/posibrain.dm,282
 -   usr: null
 -   src: the positronic brain (/obj/item/organ/internal/machine/posibrain)
 -   src.loc: null
 -   call stack:
 - the positronic brain (/obj/item/organ/internal/machine/posibrain): handle burst damage()
 - the positronic brain (/obj/item/organ/internal/machine/posibrain): add burst damage counter()
 - /datum/component/synthetic_bur... (/datum/component/synthetic_burst_damage): burst damage effects()
 - /datum/component/synthetic_bur... (/datum/component/synthetic_burst_damage): receive internal damage(x (/mob/living/carbon/human), 6.85761)
 - x (/mob/living/carbon/human):  SendSignal("machine_internal_damage", /list (/list))
 - the air cooling unit (/obj/item/organ/internal/machine/cooling_unit): take internal damage(6.85761, null)
 - the air cooling unit (/obj/item/organ/internal/machine/cooling_unit): process(1)
 - Processing (/datum/controller/subsystem/processing): fire(1)
 - Processing (/datum/controller/subsystem/processing): ignite(1)
 - Master (/datum/controller/master): RunQueue()
 - Master (/datum/controller/master): Loop(2)
 - Master (/datum/controller/master): StartProcessing(0)
 

How to reproduce

1. Spawn an IPC
2. Spawn a gun with burst fire
3. Shoot IPC
4. Observe runtime errors

Round ID

cBl-dyln

Staff ckey

No response

[sadkermit]

Testmerged PR: #20721

[NonQueueingMatt]

should be caused by the posibrain's owner somehow becoming null when a dead ipc is rejuved