Error when using Group EH "UnitKilled"

[PiG13BR]

Mods (complete and add to the following information):

• Arma 3: 2.18 stable
• CBA: 3.18.1 stable
• ACE3: 3.18.1 stable

Description: SP/editor - clean mission: Error in .../addons/medical_feedback/XEH_postInit.sqf when using group EH "UnitKilled". In dedi server .rpt: I've also got an error in the fnc_setDead.sqf. In this case was not a clean mission. More info in the logs below

Steps to reproduce:

1. Open the editor in VR, place the player unit and some other unit.
2. In the group init field of that unit, add the "UnitKilled" EH.
3. Preview the scenario and kill the unit.

Expected behavior: No error showing up.

Where did the issue occur?

• Dedicated / Singleplayer / Editor (Singleplayer)

Log Files:

• Client rpt file
• Server rpt file

Additional context:

• I've tested it out with "killed" EH and it works normally. Seems like the ace functions is getting the _group parameter from the "UnitKilled" EH (?), and this generates the error.
• Also adding the EH in the init field of that unit (e.g. (group this) addEventHandler...) generates the same issue.
• Same issue if placing more than one unit in that group.

Screenshots: Screenshots of the error after killing the unit with the group EH. Thanks to artemoz

[johnb432]

Given that CBA is also throwing an error, I doubt this is ACE's doing - I doubt it's even CBA's fault. I'll test it myself, but I have a feeling that it's something in 2.18 that's been changed.

[PabstMirror]

ace_medical_death event is running for the object and then the group

[PiG13BR]

I think it's the EH fault. It's returning wrong parameters, at least, wrong order of them. The _unit parameter should return the killed unit but it's actually returning the _killer.

[johnb432]

ACE is not the culprit, as it still happens with CBA only:

20:55:16 Error in expression <ariable ["cba_xeh_killedBody", objNull] != _unit) then {                    _uni>
20:55:16   Error position: <!= _unit) then {                    _uni>
20:55:16   Error Generic error in expression
20:55:16  ➥ Context:    [] L1 ()
    [] L1 ()

[PabstMirror]

It's really just BIS's fault

when adding a "UnitKilled" EH to a group:

• Unit Killed XEH runs first and is passed 5 args [B Alpha 1-2,X2,X1,X1,true] 1st is the group (these are the args that unitKilled group eh should be getting)

• UnitKilled runs 2nd and is passed [X2,X1,X1,true] 1st arg is the unit (these are the args that the killed unit eh should be getting)

so for some reason adding the group event switches the args around 🤡

[johnb432]

Yea, confirmed that it happens in Vanilla only too.

[johnb432]

https://feedback.bistudio.com/T185567

[PiG13BR]

Seems like this issue was fixed in 2.18 hotfix. https://dev.arma3.com/post/spotrep-00116

Tested this EH in editor with ace + CBA. No errors. Also checked .rpt file.