Problem with castbar icon in PostCastStart

[Irongunner]

Hey guys,

I am using parts of oUF_Hank in my own oUF layout. My castbar is based on the one in his addon. It has some nice fading animations based on whether the cast succeeded or not. To achieve this, a second 'dummy' castbar is used for playing the animation. In the PostCastStart function the texture of the spell icon, currently used in the 'real' castbar needs to be set in the 'dummy' castbar, so that the icon can be shown during the fade animation.

Here is the interesting part of the code from oUF_Hank:

oUF_Hank.PostCastStart = function(castbar, unit, name, rank, castid)
    ...
    castbar.Dummy.Icon:SetTexture(castbar.Icon:GetTexture())
    ...

Unfortunately the GetTexture() call sometimes returns nil, so that the fading animation shows an icon from a previous cast. Is there a way to get the texture 100% of the time?

Bests
Iron

[Irongunner]

For now my workaround looks like this. Strangely the problem does not occur inside OnUpdate(..):

-- PostCastStart / PostChannelStart:
-- replace: castbar.Dummy.Icon:SetTexture(castbar.Icon:GetTexture())
-- by: castbar.Dummy.IconTexture = nil
     
-- PostCastSucceeded / PostCastStop / PostChannelStop:
-- add castbar.Dummy.Icon:SetTexture(castbar.Dummy.IconTexture)
       
local coreCastbarUpdate = function(castbar, elapsed)
    -- insert code from oUF core castbar.lua onUpdate(..) here
end
     
oUF_Iron.OnUpdate = function(castbar, elapsed)
    if castbar.Dummy.IconTexture == nil then
        local texture = castbar.Icon:GetTexture()
        if texture ~= nil then
            castbar.Dummy.IconTexture = texture
        end
    end
    coreCastbarUpdate(castbar, elapsed)
end
     
-- Register cb.OnUpdate = oUF_Iron.OnUpdate at castbar creation