bug#23955: 24.5; Unexpected behavior of built-in function `transpose-regions'

bug#23955: 24.5; Unexpected behavior of built-in function `transpose-regions'

[Gustavo Tavares Cabral]

================ BEGINNING OF FILE ================
;; ((right))((left))
;; Expected result: ((left))((right))
;;  Current result: ((left)(((right))
;; Emacs version: 24.5
;; Command args: $ emacs -Q

(transpose-regions 6 11 15 19)  ;; should transpose "right" and "left"
================ END OF FILE ================



In GNU Emacs 24.5.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.10.8)
 of 2016-01-04 on gustavo-VirtualBox
Windowing system distributor `The X.Org Foundation', version 11.0.11701000
System Description:	Ubuntu 14.04.3 LTS

Configured using:
 `configure --prefix=/home/gustavo/prefix'

Important settings:
  value of $LANG: pt_BR.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

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  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

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Memory information:
((conses 16 72640 9067)
 (symbols 48 17639 0)
 (miscs 40 44 188)
 (strings 32 9295 4624)
 (string-bytes 1 258944)
 (vectors 16 8991)
 (vector-slots 8 383829 17105)
 (floats 8 65 248)
 (intervals 56 213 24)
 (buffers 960 13)
 (heap 1024 43780 921))

bug#23955: 24.5; Unexpected behavior of built-in function `transpose-regions'

[Tino Calancha]

I cannot reproduce the bug:

emacs -Q
;; Evaluate following form
(let* ((str ";; ((right))((left))")
        (expected ";; ((left))((right))")
        (result (with-temp-buffer
                  (insert str)
                  (transpose-regions 6 11 15 19)
                  (buffer-string))))
   (string= result expected))
=> t

In GNU Emacs 24.5.1 (x86_64-pc-linux-gnu, GTK+ Version 3.18.9)
  of 2016-04-08 on binet, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.11803000
System Description:	Debian GNU/Linux testing (stretch)

bug#23955: 24.5; Unexpected behavior of built-in function `transpose-regions'

[Gustavo Tavares Cabral]

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I've fixed the bug replacing a single `memcpy' with `memmove' (function
`Ftranspose_regions' in file `editfns.c'). The bug is already fixed for the
next version (bug #19213).

Thanks for the patience.

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