I zoned into sepulcher of the first ones and get infinitely spammed with this:

231x FrameXML\CompactUnitFrame.lua:1523: Usage: SpellIsPriorityAura(spellID)
[string "=[C]"]: in function SpellIsPriorityAura' [string "@FrameXML\CompactUnitFrame.lua"]:1523: in function <FrameXML\CompactUnitFrame.lua:1521> [string "=(tail call)"]: ? [string "@BigDebuffs\BigDebuffs-v10.10.lua"]:1414: in function <BigDebuffs\BigDebuffs.lua:1413> [string "@BigDebuffs\BigDebuffs-v10.10.lua"]:1481: in function func'
[string "@FrameXML\AuraUtil.lua"]:43: in function <FrameXML\AuraUtil.lua:38>
[string "@FrameXML\AuraUtil.lua"]:58: in function ForEachAura' [string "@BigDebuffs\BigDebuffs-v10.10.lua"]:1469: in function <BigDebuffs\BigDebuffs.lua:1448> [string "=[C]"]: in function CompactUnitFrame_UpdateAuras'
[string "@FrameXML\CompactUnitFrame.lua"]:328: in function <FrameXML\CompactUnitFrame.lua:307>
[string "=[C]"]: in function `CompactUnitFrame_UpdateAll'
[string "@FrameXML\CompactUnitFrame.lua"]:48: in function <FrameXML\CompactUnitFrame.lua:45>

Locals:
(*temporary) = "Light Stagger"

Sorry about that, it's fixed in v10.11 (#348)