These are my errors with the 7.2 patch

1x Parrot\Data\CombatEvents.lua:180: attempt to call global 'GetSpellTextureFileName' (a nil value)
Parrot\Data\CombatEvents.lua:180: in main chunk

Locals:
_ = "Parrot"
ns =

{
addon = {
}
}
Parrot = {
SetDefaultModuleLibraries = defined @Broker_Currencyflow\Libs\AceAddon-3.0\AceAddon-3.0.lua:398
UpdateFCT = defined @parrot\Code\Parrot.lua:331
SetSinkStorage = defined @ErrorFilter\Libs\LibSink-2.0\LibSink-2.0.lua:665
EnableModule = defined @Broker_Currencyflow\Libs\AceAddon-3.0\AceAddon-3.0.lua:363
modules = {
}
IterateEmbeds = defined @Broker_Currencyflow\Libs\AceAddon-3.0\AceAddon-3.0.lua:473
RegisterCombatEvent = defined @parrot\Code\CombatEvents.lua:1496
debug = defined @parrot\Code\Parrot.lua:10
Deformat = defined @parrot\Code\Parrot.lua:202
SetDefaultModulePrototype = defined @Broker_Currencyflow\Libs\AceAddon-3.0\AceAddon-3.0.lua:440
GetSinkAce3OptionsDataTable = defined @ErrorFilter\Libs\LibSink-2.0\LibSink-2.0.lua:508
newDict = defined @parrot\Code\Parrot.lua:79
GetAbbreviatedSpell = defined @parrot\Code\CombatEvents.lua:247
defaultModuleState = true
IsEnabled = defined @Broker_Currencyflow\Libs\AceAddon-3.0\AceAddon-3.0.lua:482
DisableModule = defined @Broker_Currencyflow\Libs\AceAddon-3.0\AceAddon-3.0.lua:381
RegisterMessage = defined @bagnon\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:118
UnregisterMessage = defined @bagnon\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:181
RegisterSink = defined @ErrorFilter\Libs\LibSink-2.0\LibSink-2.0.lua:627
ShowConfig = defined @parrot\Code\Parrot.lua:447
RegisterThrottleType = defined @parrot\Code\CombatEvents.lua:1603
RegisterFilterType = defined @parrot\Code\CombatEvents.lua:1633
RegisterSecondaryTriggerCondition = defined @parrot\Code\TriggerConditions.lua:168
SetConfigMode = defined @parrot\Code\ScrollAreas.lua:106
SetEnabledState = defined @Broker_Currencyflow\Libs\AceAddon-3.0\AceAddon-3.0.lua:455
UnregisterCombatLog = defined @parrot\Code\Parrot.lua:394
enabledState = true
RegisterEvent = defined @bagnon\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:118
RegisterCombatLog = defined @parrot\Code\Parrot.lua:383
IterateModules = defined @Broker_Currencyflow\Libs\AceAddon-3.0\AceAddon-3.0.lua:468
OnInitialize = defined @parrot\Code\Parrot.lua:236
NewModule = defined @Broker_Currencyflow\Libs\AceAddon-3.0\AceAddon-3.0.lua:266
del = defined @parrot\Code\Parrot.lua:60
Flash = defined @parrot\Code\Display.lua:498
GetModule = defined @Broker_Currencyflow\Libs\AceAddon-3.0\AceAddon-3.0.lua:241
HasAnimationStyle = defined @parrot\Code\AnimationStyles.lua:125
defaultModuleLibraries = {
}
GetScrollAreasChoices = defined @parrot\Code\ScrollAreas.lua:282
OnProfileChanged = defined @parrot\Code\Parrot.lua:226
GetName = defined @Broker_Currencyflow\Libs\AceAddon-3.0\AceAddon-3.0.lua:310
name = "Parrot"
orderedModules = {
}
GetSinkAce2OptionsDataTable = defined @ErrorFilter\Libs\LibSink-2.0\LibSink-2.0.lua:444
Disable = defined @Broker_Currencyflow\Libs\AceAddon-3.0\AceAddon-3.0.lua:345
ShowMessage = defined @parrot\Code\Display.lua:197
newList =

1x Parrot\Data\Auras-Auras.lua:23: attempt to call global 'GetSpellTextureFileName' (a nil value)
Parrot\Data\Auras-Auras.lua:23: in function `icon'
Parrot\Code\CombatEvents.lua:2062: in function <Parrot\Code\CombatEvents.lua:2020>
Parrot\Code\CombatEvents.lua:2178: in function <Parrot\Code\CombatEvents.lua:2175>

Locals:
info =

{
sourceName = ""
abilityName = "Sign of the Critter"
auraType = "BUFF"
sourceID = "Player-55-**"
uid = 1
sourceFlags = 1297
recipientName = ""
recipientID = "Player-55-"
damageType = 1
destFlags = 1297
spellID = 186406
}
(*temporary) = nil
(*temporary) = 186406
(*temporary) = "attempt to call global 'GetSpellTextureFileName' (a nil value)"

So it looks like, from looking at wow's ui source code, that you now use

GetSpellTexture

instead of

GetSpellTextureFileName