Re: Building the igc branch on MS-Windows

[Gerd Möllmann]

Eli Zaretskii <eliz@gnu.org> writes:

> I linked with -lmps-debug, and I got this assertion instead:
>
>   Loading d:/gnu/git/emacs/feature/lisp/faces.el (source)...
>
>   nailboard.c:205: Emacs fatal error: assertion failed: i <
>   nailboardLevelBits(nailboardNails(board), level)

I think what they call a nailboard has something to do with pinning
objects, i.e. preventing objects from moving in memory. Not that that
info is immediately useful...

> Does this give more information about a possible reason?  The relevant
> code in MPS is this:
>
>   static Index nailboardIndex(Nailboard board, Index level, Addr addr)
>   {
>     Index i = AddrOffset(RangeBase(&board->range), addr)
>       >> (board->alignShift + level * LEVEL_SHIFT);
>     AVER_CRITICAL(i < nailboardLevelBits(nailboardNails(board), level));
>     return i;
>   }
>
> and LEVEL_SHIFT is
>
>   /* Log2 of scale factor between levels. <design/nailboard#.impl.scale>. */
>   #define LEVEL_SHIFT MPS_WORD_SHIFT
>
> and MPS_WORD_SHIFT is 5 for this platform (as for all the other 32-bit
> platforms defined in mpstd.h).

Doesn't tell me anything. I've not yet tried to understand the internals
of MPS.

Could you please walk up the stack frames? Is something from us there?