Before Start!

Make sure the bug also happen when Details! is the only addon enabled.
yes

Game and Details! version
Use /details to grab these two.
WD 10406 Release 10.0.2

Describe the bug

• Steps to Reproduce (what did you do to make the bug happen):

1. /dt options
2. click Auto Run Code on leftmost pane
3. Under On Initialization event, paste this code

local b=ActionButton13 _MH=_MH or(b:SetAttribute("*type1","macro")or SecureHandlerWrapScript(b,"PreClick",b,'Z=IsShiftKeyDown()and 0 or(Z or 0)%8+1 self:SetAttribute("macrotext1","/wm [nomod]"..Z)'))or 1

4. Save and /reload

• Result (what happens when you follow the steps above):
  Details!: error running auto run script: on_init [string "..."]:31:attempt to index local 'b' (a nil value)

• Expected (what you think the expected behavior would be when following the steps):
  code runs without throwing errors

• When the bug started (a date, wow path release, details update, etc)?
  updating to 10406.148 broke this

• Additional information:
  if you local b=ActionButton12 the code runs fine. This code only throws error when local b is assigned to ActionButton13 or higher.

This is not a bug with Details. That code is only put into the auto run code section to make it run after a reload. Nothing more. Not our problem.

Appears to be the macro contains a bug