bug#21428: 24.5; Crash of emacs on OS X, installed via homebrew cask

[Eli Zaretskii]

> From: Rainer M Krug <Rainer@krugs.de>
> Cc: 21428@debbugs.gnu.org,  mituharu+bug-gnu-emacs-mac@math.s.chiba-u.ac.jp
> Date: Tue, 29 Sep 2015 10:01:56 +0200
> 
> ,----
> | (gdb) frame 2
> | #2  0x000000010008e4e6 in push_prefix_prop (it=0x7fff5fbf7f18, 
> prop=4591275764) at xdisp.c:19809
> | 19809         eassert (it->method == GET_FROM_BUFFER
> | (gdb) p it->sp
> | $5 = 1
> | (gdb) p it->stack[it->sp - 1].method
> | $6 = GET_FROM_BUFFER
> | (gdb) p it->stack[it->sp - 1].current
> | $7 = {
> |   pos = {
> |     charpos = 175,
> |     bytepos = 175
> |   },
> |   overlay_string_index = -1,
> |   string_pos = {
> |     charpos = -1,
> |     bytepos = -1
> |   },
> |   dpvec_index = -1
> | }
> | (gdb)
> `----
> 
> >
> >   (gdb) pgrowx it->glyph_row
> >   (gdb) p it->object
> >   (gdb) xtype
> 
> OK
> 
> ,----
> | (gdb) pgrowx it->glyph_row
> | (gdb)  p it->object
> | $8 = 4590394133
> | (gdb) xtype
> | Lisp_Vectorlike
> | PVEC_BUFFER
> | (gdb)
> `----

In this same frame #2, what does this produce:

  (gdb) p prop
  (gdb) xtype

If the last command says "Lisp_String", follow it with "xstring"; if
it says "Lisp_Cons", follow it with "xcar" and "xsymbol".

Also, can you recreate the same buffer in a fresh session, and tell me
what kind of text properties and overlays you have at or around buffer
position 175?

Thanks.