Describe the bug
I was in a raid in MC and I was hiding a bar because it was covering the raid icons and this error appeared:

3x FarmingBar\Core\Bars.lua:534: attempt to compare number with nil
[string "@FarmingBar\Core\Bars.lua"]:534: in function <FarmingBar\Core\Bars.lua:533>

Locals:
self = FarmingBarBar4AnchorButtonIDEditBox {
0 =
}
(*temporary) = nil
(*temporary) = 100
(*temporary) = nil
(*temporary) = ""
(*temporary) = nil
(*temporary) = "attempt to compare number with nil"
addon =

{
modules = {
}
CancelTimer = defined @datastore\libs\AceTimer-3.0\AceTimer-3.0.lua:147
SetObjectiveID = defined @FarmingBar\Core\Buttons.lua:125
DrawShoppingListGroup = defined @FarmingBar\Modules\ObjectiveBuilder.lua:867
RemoveBar = defined @FarmingBar\Core\Bars.lua:651
SetDefaultModulePrototype = defined @AngryAssignments\libs\AceAddon-3.0\AceAddon-3.0.lua:409
IsEnabled = defined @AngryAssignments\libs\AceAddon-3.0\AceAddon-3.0.lua:451
ScheduleTimer = defined @datastore\libs\AceTimer-3.0\AceTimer-3.0.lua:94
minButtonPadding = -3
maxButtonPadding = 20
MoveShoppingList = defined @FarmingBar\Modules\ItemMover.lua:226
SortObjectives = defined @FarmingBar\Modules\ObjectiveBuilder.lua:1096
UnregisterMessage = defined @datastore\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:153
DeleteTemplate = defined @FarmingBar\Modules\Templates.lua:90
ResetProfile = defined @FarmingBar\Core\Bars.lua:683
db = {
}
SetEnabledState = defined @AngryAssignments\libs\AceAddon-3.0\AceAddon-3.0.lua:424
GetDirection = defined @FarmingBar\Core\Buttons.lua:101
barProgress = "%B progress: %progressColor%%c/%t%color%%if(%p>0, (%p%%),)if%"
OnEnable = defined @FarmingBar\Core\Core.lua:10
CreateDataObject = defined @FarmingBar\Options\Interface.lua:10
bagIDs = {
}
minFontSize = 4
MoveItems = defined @FarmingBar\Modules\ItemMover.lua:187
OnInitialize = defined @FarmingBar\Core\Core.lua:47
UnregisterAllEvents = defined @datastore\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:174
ParseBarAlert = defined @FarmingBar\Core\Bars.lua:86
CreateButton = defined @FarmingBar\Core\Buttons.lua:113
maxFontSize = 32
directionInfo = {
}
UpdateMedia = defined @FarmingBar\Modules\Skin.lua:232
ConvertDB = defined @FarmingBar\Data\Database.lua:8
GetName = defined @AngryAssignments\libs\AceAddon-3.0\AceAddon-3.0.lua:279
GetOptions = defined @FarmingBar\Options\Interface.lua:2604
DrawItemGroup = defined @FarmingBar\Modules\ObjectiveBuilder.lua:478
name = "Farming Bar"
Disable = defined @AngryAssignments\libs\AceAddon-3.0\AceAddon-3.0.lua:314
Print = defined @datastore\libs\AceConsole-3.0\AceConsole-3.0.lua:54
ObjectiveBuilder = {
}
templates = {
}
CreateCoFrame = defined @FarmingBar\Modules\ItemMover.lua:341
SetMixedDBValues = defined @FarmingBar\Data\Database.lua:173
configOptions = {
}
GetAboutOptions = defined @FarmingBar\Options\Interface.lua:58
GetMixedDBValues = defined @FarmingBar\Data\Database.lua:112
SplitItem = defined @FarmingBar\Modules\ItemMover.lua:253
UnregisterEvent = defined @datastore\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:153
SetDefaultModuleLibraries = defined @AngryAssignments\libs\AceAddon-3.0\AceAddon-3.0.lua:367
EnableModule = defined @AngryAssignments\libs\AceAddon-3.0\AceAddon-3.0.lua:332
baseName = "FarmingBar"
I

After that, every time I hid a keystroke, the error would repeat. It was so strange.

Client

Classic TBC 2.5.1

To Reproduce
Steps to reproduce the behavior:

1. Shift-right-click on a floating tab of a toolbar.
2. Select 'Hidden'
3. Close interface.

Expected behavior
I expected to do the same as above with no errors.

Screenshots

Additional context
It would be very hard to reproduce since that would mean I would have to join another raid.

See v2.1.6.1.

Again, I can't test the issues with hiding the bar in the raid, but I fixed the source of the lua error you provided.

Since I don't play classic, I won't be able to test in a raid group (highest toon on vanilla classic was only 39). However I will do my best to fix the issue blind and once I do that, an update from you on how it is would be great.

Sorry this is taking a while. I've been very very busy.