Lua error in edit mode

Support Bug Report
1

I’m getting this Lua error in edit mode, and I’m unable to save any further UI edits. The problem appears to be related to the Boss Warning Medium frame, which I have moved from the default position.

Edit mode was working before I did that.

Reloading doesn’t fix it.

533x ...Blizzard_EditMode/Shared/EditModeSystemTemplates.lua:603: attempt to perform arithmetic on local 'left' (a secret value)
[Blizzard_EditMode/Shared/EditModeSystemTemplates.lua]:603: in function 'GetScaledSelectionSides'
[Blizzard_EditMode/Shared/EditModeUtil.lua]:378: in function 'GetMagneticFrameInfoOptions'
[Blizzard_EditMode/Shared/EditModeUtil.lua]:419: in function 'GetMagneticFrameInfos'
[Blizzard_EditMode/Shared/EditModeManager.lua]:1028: in function 'RefreshSnapPreviewLines'
[Blizzard_EditMode/Shared/EditModeManager.lua]:71: in function <Blizzard_EditMode/Shared/EditModeManager.lua:69>

Locals:
self = MediumEncounterWarnings {
 systemInfo = <table> {
 }
 downKeys = <table> {
 }
 hasActiveChanges = false
 dirty = false
 systemIndex = 3
 snappedFrames = <table> {
 }
 isDragging = false
 resetToDefaultPositionButton = Button {
 }
 isSelected = false
 isHighlighted = true
 isEditing = true
 dirtySettings = <table> {
 }
 settingMap = <table> {
 }
 savedSystemInfo = <table> {
 }
 settingDisplayInfoMap = <table> {
 }
 settingsDialogAnchor = <table> {
 }
 systemNameString = "Boss Warning - Medium"
 View = Frame {
 }
 minimumHeight = 36
 minimumWidth = 550
 system = 22
 Selection = Frame {
 }
 defaultHideSelection = true
}
left = <no value>
bottom = <no value>
width = <no value>
height = <no value>
scale = 1
(*temporary) = MediumEncounterWarnings {
 systemInfo = <table> {
 }
 downKeys = <table> {
 }
 hasActiveChanges = false
 dirty = false
 systemIndex = 3
 snappedFrames = <table> {
 }
 isDragging = false
 resetToDefaultPositionButton = Button {
 }
 isSelected = false
 isHighlighted = true
 isEditing = true
 dirtySettings = <table> {
 }
 settingMap = <table> {
 }
 savedSystemInfo = <table> {
 }
 settingDisplayInfoMap = <table> {
 }
 settingsDialogAnchor = <table> {
 }
 systemNameString = "Boss Warning - Medium"
 View = Frame {
 }
 minimumHeight = 36
 minimumWidth = 550
 system = 22
 Selection = Frame {
 }
 defaultHideSelection = true
}
(*temporary) = 1
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to perform arithmetic on local 'left' (a secret value)"

This is the UI layout that’s causing it:

2 50 0 0 1 7 7 UIParent 0.0 45.0 -1 ##$$%/&('%)$+#,$ 0 1 1 6 0 MainActionBar 0.0 5.0 -1 ##$$%/&('%(#,$ 0 2 0 6 8 MainActionBar 4.0 0.0 -1 ##$%%/&('%(#,$ 0 3 1 5 5 UIParent -5.0 -77.0 -1 #$$$%/&('%(#,$ 0 4 1 2 0 MultiBarRight -5.0 0.0 -1 #$$$%/&('%(#,$ 0 5 0 8 6 MultiBarLeft -4.0 0.0 -1 #$$$%/&('%(#,$ 0 6 0 0 0 UIParent 1258.4 -870.0 -1 ##$$%/&('%(#,$ 0 7 0 4 4 UIParent 0.0 -122.2 -1 ##$%%/&$'%(#,# 0 10 1 6 0 MainActionBar 0.0 5.0 -1 ##$$&('% 0 11 1 6 0 MainActionBar 0.0 5.0 -1 ##$$&('%,# 0 12 1 6 0 MainActionBar 0.0 5.0 -1 ##$$&('% 1 -1 1 4 4 UIParent 0.0 0.0 -1 ##$#%# 2 -1 1 2 2 UIParent 0.0 0.0 -1 ##$#%( 3 0 1 0 0 UIParent 4.0 -4.0 -1 $#3# 3 1 1 0 0 UIParent 250.0 -4.0 -1 %#3# 3 2 0 4 4 UIParent -439.1 -1.0 -1 %#&$3# 3 3 0 0 0 UIParent 580.2 -404.0 -1 '$(#)#--.+/#1#3#5#6(7-7$ 3 4 0 0 0 UIParent 420.5 -404.0 -1 ,#-#.#/#0&1#2(5#6(7-7$ 3 5 0 2 2 UIParent -1162.2 -95.0 -1 &#*$3# 3 6 1 5 5 UIParent 0.0 0.0 -1 -#.#/#4&5#6(7-7$ 3 7 1 4 4 UIParent 0.0 0.0 -1 3# 4 -1 0 4 4 UIParent 0.0 -199.5 -1 # 5 -1 1 6 0 MainActionBar 0.0 5.0 -1 # 6 0 1 2 0 MinimapCluster -10.0 -10.0 -1 ##$#%#&.(()( 6 1 1 2 8 BuffFrame -13.0 -15.0 -1 ##$#%#'+(()(-$ 6 2 1 1 1 UIParent 0.0 -25.0 -1 ##$#%$&.(()(+#,-,$ 7 -1 0 1 1 UIParent -32.7 -2.0 -1 # 8 -1 0 3 3 UIParent 34.0 -292.5 -1 #'$A%$&7 9 -1 1 6 0 MainActionBar 0.0 5.0 -1 # 10 -1 0 4 4 UIParent 309.5 -87.5 -1 # 11 -1 0 0 0 UIParent 1479.2 -785.9 -1 # 12 -1 0 7 1 MultiBarBottomRight 202.2 4.0 -1 #:$#%# 13 -1 1 8 8 MicroButtonAndBagsBar 0.0 0.0 -1 ##$#%)&) 14 -1 1 2 2 MicroButtonAndBagsBar 0.0 0.0 -1 ##$#%( 15 0 0 4 4 UIParent 0.0 -496.4 -1 # 15 1 0 6 0 MainStatusTrackingBarContainer 0.0 4.0 -1 # 16 -1 1 5 5 UIParent 0.0 0.0 -1 #( 17 -1 1 1 1 UIParent 0.0 -100.0 -1 ## 18 -1 1 5 5 UIParent 0.0 0.0 -1 #- 19 -1 1 7 7 UIParent 0.0 0.0 -1 ## 20 0 1 7 7 UIParent 0.0 310.0 -1 ##$/%$&('%(-($)#+$,$-$ 20 1 1 7 7 UIParent 0.0 240.0 -1 ##$*%$&('%(-($)#+$,$-$ 20 2 1 7 7 UIParent 0.0 370.0 -1 ##$$%$&('((-($)#+$,$-$ 20 3 1 7 7 UIParent 420.0 430.0 -1 #$$$%#&('((-($)#*#+$,$-$.-.$ 21 -1 0 4 4 UIParent 0.0 -96.6 -1 ##$# 22 0 1 8 7 UIParent -457.0 336.0 -1 #$$$%$&/'$(#)U*$+$,$ 22 1 0 4 4 UIParent 0.0 139.4 -1 &('()U*#+$ 22 2 0 4 4 UIParent 0.0 187.1 -1 &('()U*#+$ 22 3 0 4 4 UIParent 0.0 231.7 -1 &('()U*$+$ 23 -1 1 0 0 UIParent 0.0 0.0 -1 ##$#%$&-&$'7(%)U+$,$-$.(/U

Edit: Moving the Extra Abilities window seems to trigger the error every time. Moving some other windows doesn’t trigger the error.

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