fix(12.0): guard secret aura curve color in PostUpdateAura (script ran too long)

[mjodheim]

Problem

In-game error in Midnight (12.x):

ElvUI_Libraries/.../oUF/elements/auras.lua:360: script ran too long
  auras.lua:360 in function <auras.lua:345>   (filterIcons)
  auras.lua:406 in function 'func'            (UpdateAuras)
  oUF/events.lua:85

auras.lua:360 is just if result == VISIBLE then — it's where the watchdog tripped, not the bug. As with the other 12.0 taint reports, tainted execution gets a drastically reduced budget, so once the per-aura loop is tainted a later iteration trips "script ran too long".

Root cause

C_UnitAuras.GetAuraDispelTypeColor returns a color whose r/g/b are secret numbers. ElvUI already treats it as secret everywhere else:

• UnitFrames/Elements/AuraHighlight.lua names the result secretColor and feeds color.r/.g/.b straight into the setter (never branches on them).
• The standalone Auras/Auras.lua does color = (curve and GetAuraDispelTypeColor(...)) or fallback and passes color.r/.g/.b directly into SetBackdropBorderColor.

But UF:PostUpdateAura (UnitFrames/Elements/Auras.lua) extracted the components:

if color then
    r, g, b = color:GetRGB()   -- r,g,b become SECRET numbers
end
...
if not r then                  -- <-- branches on a secret number -> TAINT
    r, g, b = unpack(fallback)
end

if not r branches on a secret number, tainting the per-aura update loop (PostUpdateButton runs for every visible aura), which collapses the script budget and trips the watchdog above.

Fix

Mirror the AuraHighlight / standalone-Auras pattern: keep the curve result as an object (the object reference itself is not secret, only its fields are) and pass its components directly into SetBackdropBorderColor, never branching on the extracted numbers.

Strict no-op when the color is not secret.

🤖 Generated with Claude Code