Blizzard_UIWidgetTemplateTextWithState tainting issue

[2072]

Mainline/Blizzard_UIWidgetTemplateTextWithState.lua:35: attempt to perform arithmetic on local 'textHeight' (a secret number value tainted by 'Decursive'), 
STACK:
, [Interface/AddOns/Blizzard_UIWidgets/Mainline/Blizzard_UIWidgetTemplateTextWithState.lua]:35: in function 'Setup'
[Interface/AddOns/Blizzard_UIWidgets/Mainline/Blizzard_UIWidgetManager.lua]:526: in function 'ProcessWidget'
[Interface/AddOns/Blizzard_UIWidgets/Mainline/Blizzard_UIWidgetManager.lua]:562: in function 'ProcessAllWidgets'
[Interface/AddOns/Blizzard_UIWidgets/Mainline/Blizzard_UIWidgetManager.lua]:275: in function 'RegisterForWidgetSet'
[Interface/AddOns/Blizzard_GameTooltip/Mainline/GameTooltip.lua]:588: in function 'GameTooltip_AddWidgetSet'
[Interface/AddOns/Blizzard_FrameXMLUtil/AreaPoiUtil.lua]:44: in function <...terface/AddOns/Blizzard_FrameXMLUtil/AreaPoiUtil.lua:3>
[tail call]: ?
[Interface/AddOns/Blizzard_SharedMapDataProviders/AreaPOIDataProvider.lua]:166: in function 'OnMouseEnter'
[Interface/AddOns/Blizzard_SharedMapDataProviders/AreaPOIEventDataProvider.lua]:76: in function <..._SharedMapDataProviders/AreaPOIEventDataProvider.lua:74>

This is probably caused by Decursive's usage of GameTooltip... I only use AddLines on that but I'm not sure if I'm doing something wrong or if it's Blizzard's fault...

I would need a taintlog but the issue seems very random.

[rctfenix]

Hi, I enabled taintLog recording but still don't see anything yet in the Logs folder. However I have this message which may be related to the issue that suddenly occurred since last week (this wasn't an issue last Tuesday reset)

Classic Era, outside of Naxxramas in EPL and also inside of Naxxramas instance:

Please email the content of this window to Decursive+Report@2072productions.com
(Use CTRL+A to select all and then CTRL+C to put the text in your clip-board)
Also tell in your report if you noticed any strange behavior of Decursive.

2.7.34 DRUID(60) CT: 238.0410 D: Tue Mar 17 19:37:19 2026 enUS BGe DTl: 4 DE: 0 nDrE: 0 Embeded: true W: 1 (LA: 79 TAMU: 538833) TA: 0 NDRTA: 0 BUIE: 0 dbc: [d:3076-0, u:2240-0] TI: [dc:4, lc:4, y:0, LEBY:34, LB:2, TTE:287] (1.15.8, 66129, Feb 24 2026, 11508)

---

236.0390 (tr:'' ca:'false' icl:'false' h27_w27-119fps-Eastern Plaguelands): WARNING Blizzard default error handler is no longer available... -|count: 6

---

236.0390 (tr:'' ca:'false' icl:'false' h27_w27-119fps-Eastern Plaguelands): Now checking the event management library... -|count: 6

---

236.5390 (tr:'DcrDiagOneTimeEvent' ca:'false' icl:'false' h27_w27-119fps-Eastern Plaguelands): delayed call executed -|count: 6

---

238.0410 (tr:'' ca:'false' icl:'false' h27_w27-119fps-Eastern Plaguelands): Event library functionning properly, Everything seems to be OK -|count: 6

---

Bleed Conf:
21 Bleed Effects registered.
Bleed keywords:

Physical
Bleed

Active no case version:

[pP][hH][yY][sS][iI][cC][aA][lL]
[bB][lL][eE][eE][dD]

---

Action Conf:

Spells assignments:

Prio 1: - CURSE - (*%s1) -> Remove Curse

Prio 2: - POISON - (*%s2) -> Abolish Poison

---

Custom Spell Conf:

---

Decursive known spells:

(left and right side should be 'matching')

{
[DCR_LOC_MINDVISION] = [Mind Vision],
[GDREAMLESSSLEEP] = [Greater Dreamless Sleep],
[SPELL_COUNTERSPELL] = [Counterspell],
[Lesser Invisibility] = [Lesser Invisibility],
[ANCIENTHYSTERIA] = [Ancient Hysteria],
[CRIPLES] = [Cripple],
[SPELL_REMOVE_CURSE_DRUID] = [Remove Curse],
[SPELL_CLEANSE] = [Cleanse],
[SPELL_ABOLISH_POISON] = [Abolish Poison],
[Banish] = [Banish],
[SPELL_CURE_POISON_SHAMAN] = [Cure Poison],
[SPELL_ABOLISH_DISEASE] = [Abolish Disease],
[IGNITE] = [Ignite Mana],
[SPELL_DISPELL_MAGIC_PRIEST_R2] = [Dispel Magic],
[Stealth] = [Stealth],
[SPELL_REMOVE_CURSE_MAGE] = [Remove Lesser Curse],
[Prowl] = [Prowl],
[SPELL_FEAR] = [Fear],
[TAINTEDMIND] = [Tainted Mind],
[DREAMLESSSLEEP] = [Dreamless Sleep],
[WIDOWSEMBRACE] = [Widow's Embrace],
[SPELL_PURIFY] = [Purify],
[SPELL_CURE_DISEASE_PRIEST] = [Cure Disease],
[DCR_LOC_SILENCE] = [Silence],
[Frost Trap Aura] = [Frost Trap Aura],
[DUSTCLOUD] = [Dust Cloud],
[SPELL_POLYMORPH] = [Polymorph],
[SPELL_CURE_POISON_DRUID] = [Cure Poison],
[SPELL_REMOVE_GREATER_CURSE] = [Remove Greater Curse],
[SPELL_WILL_OF_THE_FORSAKEN] = [Will of the Forsaken],
[DELUSIONOFJINDO] = [Delusions of Jin'do],
[SPELL_DISPELL_MAGIC] = [Dispel Magic],
[SPELL_CURE_DISEASE_SHAMAN] = [Cure Disease],
[SONICBURST] = [Sonic Burst],
[SPELL_PURGE] = [Purge],
[Shadowmeld] = [Shadowmeld],
[PET_DEVOUR_MAGIC] = [Devour Magic],
[MAGMASHAKLES] = [Magma Shackles],
[MUTATINGINJECTION] = [Mutating Injection],
}

---

Script ran too long errors:

{
[total] = [0],
}

---

Loaded Addons:

AngryEra (v2.7.1)[13]{MU: 4626}
AtlasLootClassic (v3.2.0)[16]{MU: 3745}
AtlasLootClassic_Data (v3.2.0)[18]{MU: 1042}
AtlasLootClassic_DungeonsAndRaids (v3.2.0)[19]{MU: 1211}
Auc-Advanced (4.4.7010 (SwimmingSeadragon))[22]{MU: 4682}
Auc-Filter-Basic (4.4.7010 (SwimmingSeadragon))[23]{MU: 24}
Auc-ScanData (4.4.7010 (SwimmingSeadragon))[24]{MU: 49}
Auc-Stat-Histogram (4.4.7010 (SwimmingSeadragon))[25]{MU: 2704}
Auc-Stat-Purchased (4.4.7010 (SwimmingSeadragon))[27]{MU: 487}
Auc-Stat-Simple (4.4.7010 (SwimmingSeadragon))[28]{MU: 1015}
Auc-Stat-StdDev (4.4.7010 (SwimmingSeadragon))[29]{MU: 5519}
Auc-Stat-iLevel (4.4.7010 (SwimmingSeadragon))[26]{MU: 1977}
Auc-Util-FixAH (4.4.7010 (SwimmingSeadragon))[30]{MU: 5}
Auctionator (319)[31]{MU: 12262}
Bartender4 (4.17.3)[32]{MU: 3924}
BeanCounter (4.4.7010 (SwimmingSeadragon))[33]{MU: 2499}
BuffTimers (v2.0.13)[34]{MU: 59}
Capping (v12.0.8)[35]{MU: 164}
CharacterStatsClassic (3.9.3)[37]{MU: 895}
ClassicCameraDistance (11503)[38]{MU: 0}
DBM-Core (12.0.31)[1]{MU: 2570}
DBM-Raids-Vanilla (r818)[7]{MU: 3563}
DBM-StatusBarTimers (12.0.31)[3]{MU: 156}
DBM-VPVEM (dc126b8)[4]{MU: 0}
Decursive (2.7.34)[39]{MU: 2409}
Details (#Details.20260304.14718.170)[40]{MU: 64148}
Details_Compare2 (N/A)[41]{MU: 118}
Details_EncounterDetails (N/A)[42]{MU: 606}
Details_RaidCheck (N/A)[43]{MU: 0}
Details_TinyThreat (N/A)[46]{MU: 91}
Details_Vanguard (N/A)[47]{MU: 63}
Enchantrix (4.4.7010 (SwimmingSeadragon))[48]{MU: 3115}
Enchantrix-Barker (4.4.7010 (SwimmingSeadragon))[49]{MU: 422}
ExtendedCharacterStats (3.1.1)[50]{MU: 6293}
Gargul (7.7.21)[52]{MU: 17362}
Gargul_ItemData (1.0.0)[51]{MU: 21}
GatherMate2 (1.47.9-classic)[53]{MU: 1248}
Grid2 (2.9.22)[55]{MU: 21740}
Grid2LDB (2.9.22)[56]{MU: 11}
Grid2RaidDebuffs (2.9.22)[58]{MU: 44}
Informant (4.4.7010 (SwimmingSeadragon))[61]{MU: 8351}
InviteOnWhisper (v1.4.65)[62]{MU: 47}
ItemRack (4.23)[63]{MU: 321}
LetMeCast (1.3)[65]{MU: 1}
LoathebRotate (0.5.9)[66]{MU: 1308}
MikScrollingBattleText (6.0.3)[67]{MU: 636}
NovaRaidCompanion (1.84)[69]{MU: 208095}
NovaWorldBuffs (3.31)[70]{MU: 5404}
OPie (8.2.2)[71]{MU: 2119}
Outfitter (5.5.3.13)[72]{MU: 6033}
Peggle (2.4.2)[73]{MU: 1123}
Plater (Plater-v636-Vanilla)[74]{MU: 10008}
Prat-3.0 (3.9.94)[75]{MU: 6253}
Questie (11.23.0)[76]{MU: 36675}
SexyMap (v12.0.2)[77]{MU: 1088}
SlideBar (4.4.7010 (SwimmingSeadragon))[78]{MU: 60}
Stubby (4.4.7010 (SwimmingSeadragon))[79]{MU: 84}
TipTac (26.03.16)[82]{MU: 67568}
TipTacItemRef (26.03.16)[83]{MU: 398}
TipTacTalents (26.03.16)[85]{MU: 47}
TradeSkillMaster (v4.14.65)[86]{MU: 46563}
TwitchEmotes (v2)[89]{MU: 6385}
WeakAuras (5.21.2)[90]{MU: 27212}
WoWGatheringNodes (WoWGatheringNodes_Classic_v1.0)[96]{MU: 711}
YetAnotherItemLevel (1.0.2)[97]{MU: 8}
ZPerl (7.7.0)[113]{MU: 3914}
ZPerl_ArcaneBar (N/A)[98]{MU: 33}
ZPerl_CustomHighlight (N/A)[99]{MU: 784}
ZPerl_Party (N/A)[101]{MU: 900}
ZPerl_PartyPet (N/A)[102]{MU: 815}
ZPerl_Player (N/A)[103]{MU: 169}
ZPerl_PlayerBuffs (N/A)[104]{MU: 10859}
ZPerl_PlayerPet (N/A)[105]{MU: 66}
ZPerl_RaidAdmin (N/A)[106]{MU: 200}
ZPerl_RaidFrames (N/A)[107]{MU: 1034}
ZPerl_RaidHelper (N/A)[108]{MU: 281}
ZPerl_RaidMonitor (N/A)[109]{MU: 64}
ZPerl_RaidPets (N/A)[110]{MU: 77}
ZPerl_Target (N/A)[111]{MU: 137}
ZPerl_TargetTarget (N/A)[112]{MU: 77}

---

[bozoweed]

Blizzard issue, should be fix from the latest update or in future one

[2072]

@rctfenix the report you posted should only be shown if you previously run the chat command /dcrdiag. It creates a bug reports so the message will popup the next time you leave combat. Do you think it's what happened?

[rctfenix]

Not sure, I'm running again tonight in another 40-man, so I will make sure a TaintLog is running just in case something pops up. I did load up Swatter and was able to pull this from 3/17:

Date: 2026-03-17 19:31:27
ID: -1
Error occured in: Global
Count: 1
Message: bad argument #1 to '?' (Usage: local name, instanceType, isHeroic, isChallengeMode, displayHeroic, displayMythic, toggleDifficultyID, isLFR, minPlayers, maxPlayers, isUserSelectable = GetDifficultyIn
Debug:
[C]: ?
[Interface/AddOns/Blizzard_SharedXMLBase/CallbackRegistry.lua]:144:
...e/AddOns/Blizzard_SharedXMLBase/CallbackRegistry.lua:143
[C]: ?
[Interface/AddOns/Blizzard_SharedXMLBase/CallbackRegistry.lua]:147: in function 'TriggerEvent'
[Interface/AddOns/Decursive/Libs/BugGrabber/BugGrabber.lua]:400:
...face/AddOns/Decursive/Libs/BugGrabber/BugGrabber.lua:300
[C]: ?
[C]: in function 'GetDifficultyInfo'
[Interface/AddOns/Blizzard_ReadyCheck/Classic/ReadyCheck.lua]:33: in function 'ShowReadyCheck'
[Interface/AddOns/Blizzard_ReadyCheck/Classic/ReadyCheck.lua]:56:
...ce/AddOns/Blizzard_ReadyCheck/Classic/ReadyCheck.lua:54
Locals:

AddOns:
Swatter, v4.4.7010 (SwimmingSeadragon)
AngryEra, vv2.7.1
AtlasLootClassic, vv3.2.0
AtlasLootClassicData, vv3.2.0
AtlasLootClassicDungeonsAndRaids, vv3.2.0
AucAdvanced, v4.4.7010 (SwimmingSeadragon)
AucFilterBasic, v4.4.7010 (SwimmingSeadragon)
AucScanData, v4.4.7010 (SwimmingSeadragon)
AucStatHistogram, v4.4.7010 (SwimmingSeadragon)
AucStatiLevel, v4.4.7010 (SwimmingSeadragon)
AucStatPurchased, v4.4.7010 (SwimmingSeadragon)
AucStatSimple, v4.4.7010 (SwimmingSeadragon)
AucStatStdDev, v4.4.7010 (SwimmingSeadragon)
AucUtilFixAH, v4.4.7010 (SwimmingSeadragon)
Auctionator, v319
Bartender4, v4.17.3
BeanCounter, v4.4.7010 (SwimmingSeadragon)
BuffTimers, vv2.0.13
Capping, vv12.0.8
CharacterStatsClassic, v3.9.3
ClassicCameraDistance, v11503
DBMCore, v12.0.31
DBMPvP, vr191-1-gf8cd19e
DBMStatusBarTimers, v12.0.31
DBMVPVEM, vdc126b8
Decursive, v2.8.0-RC3
Details, v#Details.20260304.14718.170
DetailsCompare2, v
DetailsEncounterDetails, v
DetailsRaidCheck, v
DetailsTinyThreat, v
DetailsVanguard, v
Enchantrix, v4.4.7010 (SwimmingSeadragon)
EnchantrixBarker, v4.4.7010 (SwimmingSeadragon)
ExtendedCharacterStats, v3.1.1
Gargul, v7.7.21
GargulItemData, v1.0.0
GatherMate2, v1.47.9-classic
Grid2, v2.9.22
Grid2LDB, v2.9.22
Grid2RaidDebuffs, v2.9.22
Informant, v4.4.7010 (SwimmingSeadragon)
InviteOnWhisper, vv1.4.65
ItemRack, v4.23
LetMeCast, v1.3
LoathebRotate, v0.5.9
MikScrollingBattleText, v6.0.3
NovaRaidCompanion, v1.84
NovaWorldBuffs, v3.31
OPie, v8.2.2
Outfitter, v5.5.3.13
Peggle, v2.4.2
Plater, vPlater-v636-Vanilla
Prat30, v3.9.94
Questie, v11.23.0
SexyMap, vv12.0.2
SlideBar, v4.4.7010 (SwimmingSeadragon)
Stubby, v4.4.7010 (SwimmingSeadragon)
TipTac, v26.03.16
TipTacItemRef, v26.03.16
TipTacTalents, v26.03.16
TradeSkillMaster, vv4.14.65
TwitchEmotes, vv2
WeakAuras, v5.21.2
WoWGatheringNodes, vWoWGatheringNodes_Classic_v1.0
YetAnotherItemLevel, v1.0.2
ZPerl, v7.7.0
ZPerlArcaneBar, v
ZPerlCustomHighlight, v
ZPerlParty, v
ZPerlPartyPet, v
ZPerlPlayer, v
ZPerlPlayerBuffs, v
ZPerlPlayerPet, v
ZPerlRaidAdmin, v
ZPerlRaidFrames, v
ZPerlRaidHelper, v
ZPerlRaidMonitor, v
ZPerlRaidPets, v
ZPerlTarget, v
ZPerlTargetTarget, v
BlizRuntimeLib v1.15.8.66129(US)
(ck=923)

[bozoweed]

that is not the same error as befor bad argument #1 to '?' (Usage: local name, instanceType, isHeroic, isChallengeMode, displayHeroic, displayMythic, toggleDifficultyID, isLFR, minPlayers, maxPlayers, isUserSelectable = GetDifficultyIn is no more linked to the Tainted secret value usage, we have to take a look for that

[bozoweed]

Issue #51 - Final Combined Analysis Report

Executive Summary

Issue #51 contains two distinct Blizzard bugs, both confirmed after thorough investigation.

---

Bug #1: UIWidget Taint (Original)

Verdict: BLIZZARD BUG ✅ CONFIRMED

Aspect	Details
Error	attempt to perform arithmetic on 'textHeight' (secret number tainted by Decursive)
Source	Blizzard_UIWidgetTemplateTextWithState.lua:35
Cause	Secret Values system (Midnight 12.0.0) fails to handle taint propagation
Decursive code	Uses GameTooltip API correctly
Responsibility	100% Blizzard

---

Bug #2: GetDifficultyInfo (New Report - rctfenix)

Verdict: BLIZZARD BUG ✅ CONFIRMED

Aspect	Details
Error	bad argument #1 to '?' (Usage: ...GetDifficultyInfo...)
Source	Blizzard_ReadyCheck/Classic/ReadyCheck.lua:33
Cause	Blizzard code passes invalid/nil argument to GetDifficultyInfo
Decursive code	Zero interaction - no calls, no hooks, no taint
Responsibility	100% Blizzard

Technical Evidence:

• GetDifficultyInfo: 0 occurrences in Decursive codebase
• ReadyCheck: 0 occurrences
• No hooks on related APIs
• Stack trace contains no Decursive code

---

Investigation Summary

Criteria	Bug #1	Bug #2
Type	Taint propagation	Invalid API argument
Component	UIWidgets	ReadyCheck
Trigger	Map POI hover	ReadyCheck in raid
Client	Mainline	Classic Era
Decursive involved	Indirect (taint)	None
Action required	None	None

---

Conclusion

Both errors originate from Blizzard code. Decursive uses the WoW API correctly and has no direct responsibility for either bug.

[2072]

@rctfenix There is a good chance that 89db5b1 fixed this issue.