build: 7.3.5.18-2-gaf14c9b just pushed through on curse with the taxi changes is throwing a lua error when you get on a taxi and then when you get off the taxi. Need to Disable and Enable to get the icons back.

4x Hekili\Utils.lua:238: attempt to call upvalue 'func' (a nil value)
Hekili\Utils.lua:238: in function <Hekili\Utils.lua:237>

Locals:
(*temporary) = nil
(*temporary) = "attempt to call upvalue 'func' (a nil value)"
func = nil
args = <table> {
}

Other info from addon:

build: 7.3.5.18-2-gaf14c9b
level: 110
class: SHAMAN
spec: enhancement

talents: earthen_spike
fury_of_air
landslide
lightning_surge_totem
overcharge
tempest
wind_rush_totem

traits: alpha_wolf=1
concordance_of_the_legionfall=28
crashing_hammer=5
doom_vortex=1
doom_winds=1
doom_wolves=1
earthshattering_blows=1
elemental_healing=4
forged_in_lava=4
gathering_of_the_maelstrom=4
gathering_storms=6
hammer_of_storms=1
lashing_flames=1
might_of_the_earthen_ring=1
raging_storms=1
spirit_of_the_maelstrom=5
spiritual_healing=5
stormflurry=1
unleash_doom=1
weapons_of_the_elements=5
wind_strikes=4
wind_surge=4
winds_of_change=1

sets/legendaries/artifacts: amanthuls_vision=1
doomhammer=1
eonars_compassion=1
smoldering_heart=1
soul_of_the_farseer=1
tier21=4

gear: 152169/headdress_of_venerated_spirits/Headdress of Venerated Spirits=1
151973/collar_of_nullflame/Collar of Null-Flame=1
152004/pauldrons_of_the_soulburner/Pauldrons of the Soulburner=1
152166/robes_of_venerated_spirits/Robes of Venerated Spirits=1
139077/bramblemail_belt/Bramblemail Belt=1
152170/leggings_of_venerated_spirits/Leggings of Venerated Spirits=1
134210/tideskorn_sabatons/Tideskorn Sabatons=1
152008/realitysplitting_wristguards/Reality-Splitting Wristguards=1
151819/smoldering_heart/Smoldering Heart=1
152284/zealous_tormentors_ring/Zealous Tormentor's Ring=1
151647/soul_of_the_farseer/Soul of the Farseer=1
151968/shadowsinged_fang/Shadow-Singed Fang=1
154172/amanthuls_vision/Aman'Thul's Vision=1
152167/drape_of_venerated_spirits/Drape of Venerated Spirits=1
128819/doomhammer/Doomhammer=1
128873/fury_of_the_stonemother/Fury of the Stonemother=1

Fixed in 3aa6d1b.