Crash attempting to evaluate 'self'

leehickey · June 2008

Using the latest build, 1.10 (1028) I often get a crash. It happens when I hit a breakpoint then point the mouse at a part of a line containing 'self' such as:

function panel:Update()
if self._someValue then
-- do something
end
end

Pointing the cursor at the 'self' seemingly kicks off some iterator causing a hang. If I manually kill the app that I'm debugging, Decoda comes back to life with an error message along the lines of:

An exception has been caught:
invalid key to 'next'

solidyang · July 2008

Also crash attempting to evaluate some key words, like 'local' <img src="style_emoticons/<#EMO_DIR#>/asrifle.gif" style="vertical-align:middle" emoid="::asrifle::" border="0" alt="asrifle.gif" /> 'function'...

Max · July 2008

Thanks for the report.

leehickey · July 2008

Any news? An option to 'not' auto-evaluate on mouse-over would be a useful work-around until you track it down.

Max · July 2008

<div class='quotetop'>QUOTE(leehickey @ Jul 21 2008, 03:31 AM) <a href="index.php?act=findpost&pid=1684130"><{POST_SNAPBACK}></a></div><div class='quotemain'>Any news? An option to 'not' auto-evaluate on mouse-over would be a useful work-around until you track it down.</div>
I haven't been able to reproduce this problem yet. I'm still working on it though.

BrianWeed · September 2008

I'm also getting a crash when attempting to evaluate 'self'. I assumed it has something to do the fact that I have modified the lua structures: lua_Debug, and Proto to include some new function information that our tools read. The crash goes away when I back out my changes. I assume that Decoda works by assuming the size and, and layout of those structures. Its possible the original poster has also modified Lua in such a manor.

I would like to know more about how Decoda uses these structures, since I need to have extra fields in both lua_Debug, and Proto for my own tools.
Would it be possible for UnknownWorlds to add some setting where I can override the size of these structures, so that Decoda can ignore my custom data?

Thanks

Brian

Max · September 2008

<div class='quotetop'>QUOTE(BrianWeed @ Sep 30 2008, 01:29 PM) <a href="index.php?act=findpost&pid=1689160"><{POST_SNAPBACK}></a></div><div class='quotemain'>I'm also getting a crash when attempting to evaluate 'self'. I assumed it has something to do the fact that I have modified the lua structures: lua_Debug, and Proto to include some new function information that our tools read. The crash goes away when I back out my changes. I assume that Decoda works by assuming the size and, and layout of those structures. Its possible the original poster has also modified Lua in such a manor.

I would like to know more about how Decoda uses these structures, since I need to have extra fields in both lua_Debug, and Proto for my own tools.
Would it be possible for UnknownWorlds to add some setting where I can override the size of these structures, so that Decoda can ignore my custom data?</div>
Yes, Decoda will have issues if lua_Debug does not match the vanilla definition.

Generally when something like this has come up with a modification of Lua, my recommendation has been to preserve the existing Lua interface and add new functions to handle the additional data. For example, creating a lua_Debug_ex structure with the additional fields and lua_getinfo_ex that accepts the modified structure.

Allowing the application to override the expected size of the lua_Debug structure would work, but let me look into some other ways of handling this.

BrianWeed · October 2008

Ok, I changed my solution so that I can get the debug information I need without modifying lua_Debug. I do still have a modified Proto, but hopefully that won't conflict with Decoda.

My crash is now gone.

Thanks.

Brian

leehickey · December 2008

<div class='quotetop'>QUOTE(Max @ Jul 21 2008, 06:03 PM) <a href="index.php?act=findpost&pid=1684161"><{POST_SNAPBACK}></a></div><div class='quotemain'>I haven't been able to reproduce this problem yet. I'm still working on it though.</div>

Any news yet? It's been a while <img src="style_emoticons/<#EMO_DIR#>/smile-fix.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile-fix.gif" />

I haven't used Decode much since buying it, mainly due to this issue, but each time I have a niggly little bug I want to sort out I end up running into this. I'm more than happy to try and help fix this issue as it's driving me potty. You can contact me off-list if you want me to help out in any way.

Crash attempting to evaluate 'self'

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