I'm NOT a httrack developer, but I came to this
forum/list to report "my own version" 
of the crash symptoms on Raspberry_Pi_3:

----citation----start-----
warc_librarian@acstorage3334:/media/pi/Sinine230GiBUSB/warc_librarian/programming_languages_and_libraries/graphics/X11_ja_VNC_and_analogues/2017_10_01_wget_copy_of_https_www_freedesktop_org_wiki_Specifications/bonnet
$ nice -n15 httrack

Welcome to HTTrack Website Copier (Offline Browser) 3.48-20
Copyright (C) 1998-2014 Xavier Roche and other contributors
To see the option list, enter a blank line or try httrack --help

Enter project name
:2017_10_01_copy_of_https_www_freedesktop_org_wiki_Specifications

Base path (return=/home/warc_librarian/websites/)
:/media/pi/Sinine230GiBUSB/warc_librarian/programming_languages_and_libraries/graphics/X11_ja_VNC_and_analogues/2017_10_01_wget_copy_of_https_www_freedesktop_org_wiki_Specifications/bonnet

Enter URLs (separated by commas or blank spaces)
:https://www.freedesktop.org/wiki/Specifications/

Action:
(enter)	1	Mirror Web Site(s)
	2	Mirror Web Site(s) with Wizard
	3	Just Get Files Indicated
	4	Mirror ALL links in URLs (Multiple Mirror)
	5	Test Links In URLs (Bookmark Test)
	0	Quit
: 4

Proxy (return=none) :

You can define wildcards, like: -*.gif +www.*.com/*.zip -*img_*.zip
Wildcards (return=none) :*.xml *.pdf *.odf *.rtf *.txt *.zip *.gz *.xml *.jpeg
*.jpg *.gif *.png *.svg *.js *.css *.bmp *.xz *.ps *.arj *.dvi *.xhml

You can define additional options, such as recurse level (-r<number>), separed
by blank spaces
To see the option list, type help
Additional options (return=none) :-r5

---> Wizard command line: httrack
<https://www.freedesktop.org/wiki/Specifications/>  -O
"/media/pi/Sinine230GiBUSB/warc_librarian/programming_languages_and_libraries/graphics/X11_ja_VNC_and_analogues/2017_10_01_wget_copy_of_https_www_freedesktop_org_wiki_Specifications/bonnet/2017_10_01_copy_of_https_www_freedesktop_org_wiki_Specifications"
--mirrorlinks  -%v -r5  *.xml *.pdf *.odf *.rtf *.txt *.zip *.gz *.xml *.jpeg
*.jpg *.gif *.png *.svg *.js *.css *.bmp *.xz *.ps *.arj *.dvi *.xhml

Ready to launch the mirror? (Y/n) :Y

*** buffer overflow detected ***: httrack terminated

Caught signal 6

Please report the problem at <http://forum.httrack.com>
Aborted
warc_librarian@acstorage3334:/media/pi/Sinine230GiBUSB/warc_librarian/programming_languages_and_libraries/graphics/X11_ja_VNC_and_analogues/2017_10_01_wget_copy_of_https_www_freedesktop_org_wiki_Specifications/bonnet
$ which httrack
/usr/bin/httrack
warc_librarian@acstorage3334:/media/pi/Sinine230GiBUSB/warc_librarian/programming_languages_and_libraries/graphics/X11_ja_VNC_and_analogues/2017_10_01_wget_copy_of_https_www_freedesktop_org_wiki_Specifications/bonnet
$ uname -a
Linux acstorage3334 4.9.35-v7+ #1014 SMP Fri Jun 30 14:47:43 BST 2017 armv7l
GNU/Linux
warc_librarian@acstorage3334:/media/pi/Sinine230GiBUSB/warc_librarian/programming_languages_and_libraries/graphics/X11_ja_VNC_and_analogues/2017_10_01_wget_copy_of_https_www_freedesktop_org_wiki_Specifications/bonnet
$ date
Sun Oct  1 15:26:47 EEST 2017
warc_librarian@acstorage3334:/media/pi/Sinine230GiBUSB/warc_librarian/programming_languages_and_libraries/graphics/X11_ja_VNC_and_analogues/2017_10_01_wget_copy_of_https_www_freedesktop_org_wiki_Specifications/bonnet
$
----citation----end-----