WowAce

What steps will reproduce the problem?
1. Open menu
2. "Player Scripts"
3. Click "New Menu"
4. Enter name, click accept

What is the expected output? What do you see instead?
Expect the window to clear and the menu listing to be created. Error pops up, window remains, no menu created.

What version of the product are you using?
0.8

Do you have an error log of what happened?

2x ArbitraryCommands\ac.lua:363: Argument to :RegisterMenu tries to index a menu that doesn't exist yet
[C]: in function `assert'
ArbitraryCommands\ac.lua:363: in function `getparent'
ArbitraryCommands\ac.lua:669: in function `RegisterMenu'
ArbitraryCommands\editor.lua:158: in function <ArbitraryCommands\editor.lua:147>
(tail call): ?
FrameXML\StaticPopup.lua:3945: in function `StaticPopup_OnClick'
[string "*:OnClick"]:1: in function <[string "*:OnClick"]:1>

Locals:
self = <table> {
defaults = <table> {
}
minimap_icon_right_click = <function> defined @ArbitraryCommands\editor.lua:107
EnableModule = <function> defined @Alts\Libs\AceAddon-3.0\AceAddon-3.0.lua:363
modules = <table> {
}
ClearCommands = <function> defined @ArbitraryCommands\ac.lua:656
IterateEmbeds = <function> defined @Alts\Libs\AceAddon-3.0\AceAddon-3.0.lua:473
OnChatCommand = <function> defined @ArbitraryCommands\ac.lua:341
gen_submenu = <function> defined @ArbitraryCommands\ac.lua:534
added_menu_name_map = <table> {
}
Printf = <function> defined @Alts\Libs\AceConsole-3.0\AceConsole-3.0.lua:69
SetDefaultModulePrototype = <function> defined @Alts\Libs\AceAddon-3.0\AceAddon-3.0.lua:440
defaultModuleState = true
IsEnabled = <function> defined @Alts\Libs\AceAddon-3.0\AceAddon-3.0.lua:482
DisableModule = <function> defined @Alts\Libs\AceAddon-3.0\AceAddon-3.0.lua:381
script_tree = <table> {
}
GetArgs = <function> defined @Alts\Libs\AceConsole-3.0\AceConsole-3.0.lua:144
KEYSEP = "    "
get_menu_offset = <function> defined @ArbitraryCommands\ac.lua:395
db = <table> {
}
SetEnabledState = <function> defined @Alts\Libs\AceAddon-3.0\AceAddon-3.0.lua:455
enabledState = true
populate_data_tables = <function> defined @ArbitraryCommands\ac.lua:490
OnEnable = <function> defined @ArbitraryCommands\ac.lua:264
top_menu = <table> {
}
Enable = <function> defined @Alts\Libs\AceAddon-3.0\AceAddon-3.0.lua:325
RegisterChatCommand = <function> defined @Alts\Libs\AceConsole-3.0\AceConsole-3.0.lua:85
build_main_window = <function> defined @ArbitraryCommands\editor.lua:91
GetModule = <function> defined @Alts\Libs\AceAddon-3.0\AceAddon-3.0.lua:241
defaultModuleLibraries = <table> {
}
helptext = <table> {
}
getparent = <function> defined @ArbitraryCommands\ac.lua:349
UnregisterChatCommand = <function> defined @Alts\Libs\AceConsole-3.0\AceConsole-3.0.lua:111
RegisterCommand = <function> defined @ArbitraryCommands\ac.lua:683
dropdownframe = ArbitCommDropDownMenu {
}
find = <function> defined @ArbitraryCommands\ac.lua:428
GetMenuLocations = <function> defined @ArbitraryCommands\ac.lua:334
orderedModules = <table> {
}
Disable = <function> defined @Alts\Libs\AceAddon-3.0\AceAddon-3.0.lua:345
blizOptionsFrame = <unnamed> {
}
BackRegister = <function> defined @ArbitraryCommands\ac.lua:729
RefreshConfig = <function> defined @ArbitraryCommands\ac.lua:554
Print = <function> defined @Alts\Libs\AceConsole-3.0\AceConsole-3.0.lua:54
static_script_tree = <table> {
}
IsModule = <function> defined @Alts\Libs\AceAddon-3.0\AceAddon-3.0.lua:499
SetOption = <function> defined @ArbitraryCommands\ac.lua:207
SetDefaultModuleState = <function> defined @Alts\Libs\AceAddon-3.0\AceAddon-3.0.lua:418
SetDefaultModuleLibraries = <function> defined @Alts\Libs\AceAddon-3.0\AceAddon-3.0.lua:398
NewModule = <function> defined @Alts\Libs\AceAddon-3.0\AceAddon-3.0.lua:266
RegisterMenu = <function> defined @ArbitraryCommands\ac.lua:661
commands = <table> {
}
gen_tree_entry = <function> defined @ArbitraryCommands\ac.lua:528
RunScript = <function> defined @ArbitraryCommands\ac.lua:610
is_slash = <table> {
}
gen_menu_entry = <function> defined @ArbitraryCommands\ac.lua:516
ToggleEnable = <function> defined @ArbitraryCommands\ac.lua:321
options = <table> {
}
get_submenu = <function> defined @ArbitraryCommands\ac.lua:403
GetName = <function> defined @Alt

I think I know why this happened. I didn't have a 'selection' when i clicked "new menu". I tried it for a third time but happened to have previously clicked another script listing and it worked with no error.