Hey fellow addon author,

I have a lot of macros like

#show Cobra Shot

/targetenemy [noexists]
/petattack [harm, nodead]
/cast Claw
/cast Bite
/cast Smack

/cast Cobra Shot

which cause an integer overflow attempting to store 3238019515 from Neuron-Buttons.lua:1345:

alt_Name = GetSpellInfo(sIndex[spellName].spellID_Alt):lower()

So I changed it to

local status, err = pcall(function ()
  alt_Name = GetSpellInfo(sIndex[spellName].spellID_Alt):lower()
end)

if not status then
  print("NEURON ERROR", err)
  print(spellName)
end

Which prints out the spell name, claw.

I'm not sure if this bug has any impact on functionality, I just figured I'd let you know it exists.

I just made a pull request with a fix: #152