SavedVariables not writing table

[chrisronline]

Hey folks,

I'm fairly new to lua and WoW addon development in general so hopefully this is a simple issue.

I have the following code as the only lua file loaded by my addon.

local REGION_NAMES = {
	[1] = 'us',
	[2] = 'kr',
	[3] = 'eu',
	[4] = 'tw',
	[5] = 'cn'
}
local DELIMITER = '::'
local MINOR = 95

local function getWardrobe()
	local wardrobe = {}
	for colType = 1, Enum.TransmogCollectionTypeMeta.NumValues do
		local app = C_TransmogCollection.GetCategoryAppearances(colType)
		for k, o in pairs(app) do
			if o.isCollected and not o.isHideVisual then
				for i, source in ipairs(C_TransmogCollection.GetAppearanceSources(o.visualID)) do
					local _, _, _, _, _, link = C_TransmogCollection.GetAppearanceSourceInfo(source.sourceID)
					local itemID = GetItemInfoInstant(link)
					local str = itemID .. ':' .. colType
					tinsert(wardrobe, str)
				end
			end
		end
	end
	return wardrobe
end

local function saveWardrobe()
	local region = REGION_NAMES[GetCurrentRegion()]
	local realm = GetRealmName()
	local character = UnitName('player')
	local wardrobe = getWardrobe()
	local hash = region .. ':' .. realm .. ':'.. character

	ArmoryHubExportData = ArmoryHubExportData and wipe(ArmoryHubExportData)  or {}
	ArmoryHubExportData.version = MINOR
	ArmoryHubExportData[hash] = ArmoryHubExportData[hash] or {}
	ArmoryHubExportData[hash].region = region
	ArmoryHubExportData[hash].realm = realm
	ArmoryHubExportData[hash].character = character
	ArmoryHubExportData[hash].wardrobe = wardrobe

	print('ArmoryHub: Saved wardrobe with ' .. table.getn(ArmoryHubExportData[hash].wardrobe) .. ' items')
end

local frame = CreateFrame('FRAME');
frame:RegisterEvent('ADDON_LOADED');
frame:RegisterEvent('PLAYER_LOGOUT');

function frame:OnEvent(event, arg1)
	if event == 'PLAYER_LOGOUT' then
		saveWardrobe()
	end
end

frame:SetScript('OnEvent', frame.OnEvent);
SLASH_ARMORYHUB1 = '/ah';
SlashCmdList['ARMORYHUB'] = function(msg)
	saveWardrobe()
end

In-game, the output says something like "ArmoryHub: Saved wardrobe with 5670 items".

However, when I open the SavedVariables file from my local disk, I see:

ArmoryHubExportData = {
	["version"] = 95,
	["us:Area 52:Dyspeptic"] = {
		["wardrobe"] = {
		},
		["character"] = "Dyspeptic",
		["realm"] = "Area 52",
		["region"] = "us",
	},
}

I don't know why the "wardrobe" field is not written out. I tried creating a simple table with a few entries and it writes it without issue. Is it a size issue? Is it trying to write too much at once?