What steps will reproduce the problem?
1. have gimplist instalted with prat
2. start playing

What is the expected output? What do you see instead?
at random the game hangs and buggrabber gets spammed with errors until it stops recording errors for 30 secs

What version of the product are you using?
Gimplist-v1.07

Do you have an error log of what happened?
10x Gimplist-v1.07\Gimplist.lua:478 table index is nil
Prat-3.0-3.4.6      \services\chatsections.lua:59 in function <Prat-3.0\services\chatsections.lua:52
Prat-3.0-3.4.6      \services\chatsections.lua:321 in function `SplitChatMessage'
Prat-3.0-3.4.6      \addon\addon.lua:569 in function <Prat-3.0\addon\addon.lua:545
(tail call): ?:
Interface\FrameXML\ChatFrame.lua:2538 in function `ChatFrame_OnEvent':
<string>:"*:OnEvent":1: in function <[string "*:OnEvent"]:1>

Locals:
frame = ChatFrame1 {
 0 = <userdata>
 flashTimer = 0.45200024358928
 isInitialized = 1
 mouseOutTime = 1.0000000447035
 ScrollUp = <function> defined =[C]:-1
 PageUp = <function> defined =[C]:-1
 tellTimer = 8001.89
 print = <function> @ Prat-3.0\services\print.lua:52
 buttonSide = "left"
 defaultLanguage = "Common"
 resizeButton = ChatFrame1ResizeButton {}
 buttonFrame = ChatFrame1ButtonFrame {}
 dbg = <function> @ Prat-3.0\services\print.lua:55
 PageDown = <function> defined =[C]:-1
 oldAlpha = 0
 channelList = <table> {}
 ScrollToBottom = <function> defined =[C]:-1
 clickAnywhereButton = ChatFrame1ClickAnywhereButton {}
 isStaticDocked = true
 mouseInTime = 0
 editBox = ChatFrame1EditBox {}
 ScrollDown = <function> defined =[C]:-1
 isLocked = 1
 name = "Misc"
 ScrollToTop = <function> defined =[C]:-1
 isDocked = 1
 zoneChannelList = <table> {}
 AddMessage = <function> @ Ace3\AceHook-3.0\AceHook-3.0.lua:100
 messageTypeList = <table> {}
}
event = "CHAT_MSG_CHANNEL"
arg1 = "Southshore is under attack!"
arg2 = ""
arg3 = ""
arg4 = "4. WorldDefense"
arg5 = ""
arg6 = ""
arg7 = 23
arg8 = 4
arg9 = "WorldDefense"
arg10 = 0
arg11 = 114
arg12 = ""
arg13 = 0
arg14 = true
arg15 = false
filter = nil
chatFilters = <table> {
 1 = <function> @ AudioX\AudioX.lua:647
 2 = <function> @ BadBoy\BadBoy.lua:171
 3 = <function> @ BadBoy_CCleaner\BadBoy_CCleaner.lua:39
 4 = <function> @ BadBoy_Guilded\BadBoy_Guilded.lua:3
 5 = <function> @ Gimplist\Gimplist.lua:454
 6 = <function> @ IgnoreMore\IgnoreMore.lua:433
}
(for generator) = <function> defined =[C]:-1
(for state) = <table> {
 1 = <function> @ AudioX\AudioX.lua:647
 2 = <function> @ BadBoy\BadBoy.lua:171
 3 = <function> @ BadBoy_CCleaner\BadBoy_CCleaner.lua:39
 4 = <function> @ BadBoy_Guilded\BadBoy_Guilded.lua:3
 5 = <function> @ Gimplist\Gimplist.lua:454
 6 = <function> @ IgnoreMore\IgnoreMore.lua:433
}
(for control) = 5
_ = 5
filterFunc = <function> @ Gimplist\Gimplist.lua:454
_G = <table> {
 BuyButton11Highlight = BuyButton11Highlight {}
 ActionButton7FlyoutBorder = ActionButton7FlyoutBorder {}
 PowaDropDownAnim1ButtonHighlightTexture = PowaDropDownAnim1ButtonHighlightTexture {}
 MultiCastActionButton6Cooldown = MultiCastActionButton6Cooldown {}
 MerchantItem9ItemButtonStock = MerchantItem9ItemButtonStock {}
 GetTrainerServiceTypeFilter = <function> defined =[C]:-1
 UNIT_NAMES_COMBATLOG_TOOLTIP = "Color unit names."
 KBASE_NUM_FAKE_CATEGORIES = 1
 Recount_MainWindow_Bar6 = Recount_MainWindow_Bar6 {}
 SetTrainerServiceTypeFilter = <function> defined =[C]:-1
 BT4Button58 = BT4Button58 {}
 DecursiveSkipListFrameClose = DecursiveSkipListFrameClose {}
 AltoholicAccountSharingOptionsIconNever = AltoholicAccountSharingOptionsIconNever {}
 TutorialFrameLeft19 = TutorialFrameLeft19 {}
 MultiCastActionButton2Cooldown = MultiCastActionButton2Cooldown {}
 ERR_TRADE_EQUIPPED_BAG = "You can't trade equipped bags."
 PVP_RANK_6_1 = "Corporal"
 BOOKTYPE_PROFESSION = "professions"
 AudioOptionsVoicePanelOutputDeviceDropDownButtonHighlightTexture = AudioOptionsVoicePanelOutputDeviceDropDownButtonHighlightTexture {}
 InterfaceOptionsDisplayPanelShowAggroPercentageText = InterfaceOptionsDisplayPanelShowAggroPercentageText {}
 VideoOptionsFrameDefaults = VideoOptionsFrameDefaults {}
 MerchantItem4AltCurrencyFrameItem1Text = MerchantItem4AltCurrencyFrameItem1Text {}
 BINDING_NAME_NAMEPLATES = "Show Enemy Name Plates"
 IsReferAFriendLinked = <function> defined =[C]:-1
 MAIL_LETTER_TOOLTIP = "Click to make a permanent
copy of this letter."
 AudioOptionsVoicePanelMicrophoneVolumeThumb = AudioOptionsVoicePanelMicrophoneVolumeThumb {}
 CALENDAR_RAID_RESET_DESCRIPTION = "%1$s r
  ---

Please provide any additional information below.
the spamming errors change the line 10 from
"frame = ChatFrame1 {" for
"frame = ChatFrame2 {" and goes on for each error.
As you can see its having issues with prat (http://www.wowace.com/addons/prat-3-0/), if you want I can post this ticket with the other project