Re: Help: Crash in garbage collection

[Roberto Ierusalimschy <roberto@...>]

> I've had to do a rebuild of the app, and now the crash has moved. It's
> now in lgc.c
> 
> propagatemark()
> 	case LUA_TTABLE:
> traversetable()
> ->      if (!weakkey) markvalue(g, gkey(n));
> 
> The value of g going in to this function looks a little dubious.
> strt.nuse = 1363, size = 2048, sweepstrgc = 2048.  You said sweepstrgc
> cannot be more than size, but can it be equal?

Yes.

 
> Also GCthreshold = 2712903, as does "totalbytes" is this a bad thing, it
> seems like it might be.

No problem here, I guess.


> Unfortunately this is a windows app, so I can't use valgrind.  I had a
> look at Memory Validator but it didn't flag anything up, maybe I wasn't
> using it right.  It kind of looks like memory corruption being that it
> moves, but I'm suspiciois of that totalbytes count...
> 
> Oh, yes, this is essentially a standard lua 5.1 installation.  It's got
> bitlib compiled in, and a tiny bit of added functionality to tell some
> external code of when a library is "required", but that's it.

It looks like memory corruption. Can you reproduce this bug consistently?


-- Roberto