Re: pure-fns in byte-opt.el

[Eli Zaretskii <eliz@gnu.org>]

> Date: Fri, 28 Jul 2017 21:24:07 -0400
> From: Mark Oteiza <mvoteiza@udel.edu>
> Cc: emacs-devel@gnu.org
> 
> >> #3  0x000000000060f09b in Ffuncall (nargs=4, args=0x7fffffffb688) at eval.c:2742
> >>         fun = XIL(0x17aee65)
> >>         original_fun = XIL(0x20b0da0)
> >>         funcar = XIL(0xce8cc0)
> >>         numargs = 3
> >>         val = make_number(897379714801469509)
> >>         count = 58
> >
> >In this frame #3, what are the values of the important variables?
> >
> >  (gdb) frame 3
> >  (gdb) pp original_fun
> 
> unidata-gen-table-word-list
> 
> >  (gdb) pp args[1]
> >  (gdb) pp args[2]
> >  (gdb) pp args[3]
> 
> decomposition
> 5
> unidata-split-decomposition
> 
> >  (gdb) pp funcar
> >  (gdb) pp fun
> 
> #<INVALID_LISP_OBJECT 0x00ce8cc0>

Thanks.

So I think the problem happens in unidata-word-list-compress, and it
happens because make-vector, which that function calls always returns
the same vector, so the vectors used by that function and created by
it are all messed up.