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bug#35429: 27.0.50; Arbitrary xdisp.c related crashes when working with


From: Kaushal Modi
Subject: bug#35429: 27.0.50; Arbitrary xdisp.c related crashes when working with overlay-using packages
Date: Fri, 26 Apr 2019 14:34:38 -0400

On Fri, Apr 26, 2019 at 2:32 PM Eli Zaretskii <address@hidden> wrote:
So now what do the following commands tell?

  (gdb) fr 2
  (gdb) p w->start
  (gdb) xmarker
  (gdb) p *$

(gdb) fr 2
#2  0x0000000000456b44 in init_iterator (address@hidden, address@hidden, charpos=2874,
    bytepos=<optimized out>, row=<optimized out>, address@hidden)
    at xdisp.c:3047
3047          eassert (charpos == BYTE_TO_CHAR (bytepos));
(gdb) p w->start
$13 = XIL(0x89daa95)
(gdb) xmarker
$14 = (struct Lisp_Marker *) 0x89daa90
(gdb) p *$
$15 = {
  header = {
    size = 4611686018477740032
  },
  buffer = 0x8d95c10,
  need_adjustment = false,
  insertion_type = false,
  next = 0x89daaf0,
  charpos = 2874,
  bytepos = 2874
}
(gdb)

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