Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 11300] New: Capture columns disappear when moving other columns around in pref

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Bug ID	11300
Summary	Capture columns disappear when moving other columns around in preferences
Product	Wireshark
Version	Git
Hardware	x86-64
OS	Windows 7
Status	UNCONFIRMED
Severity	Normal
Priority	Low
Component	Qt UI
Assignee	bugzilla-admin@wireshark.org
Reporter	dev.null.2007@gmail.com

Build Information:
Version 1.99.8 (v1.99.8rc0-31-gc52dc98 from master)

Copyright 1998-2015 Gerald Combs <gerald@wireshark.org> and contributors.
License GPLv2+: GNU GPL version 2 or later
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Compiled (64-bit) with Qt 5.4.2, with WinPcap (4_1_3), with libz 1.2.8, with
GLib 2.42.0, with SMI 0.4.8, with c-ares 1.9.1, with Lua 5.2, with GnuTLS
3.2.15, with Gcrypt 1.6.2, with MIT Kerberos, with GeoIP, without PortAudio,
with AirPcap.

Running on 64-bit Windows 7 Service Pack 1, build 7601, with locale C, without
WinPcap, with GnuTLS 3.2.15, with Gcrypt 1.6.2, without AirPcap.
       Intel(R) Core(TM) i5-2430M CPU @ 2.40GHz (with SSE4.2), with 4001MB of
physical memory.


Built using Microsoft Visual C++ 12.0 build 31101

Wireshark is Open Source Software released under the GNU General Public
License.

Check the man page and http://www.wireshark.org for more information.
--
Trying to add new columns in the Qt UI, and when I try to drag and drop them
into position, other columns disappear from the list.

My default profile has No., Time, Source, Destination, Protocol, Length, Info. 
When I create a new column (to add ports back in), I go to Edit > Preferences >
Appearance > Columns, hit '+' at the bottom, and then drag it after Source; it
winds up in the right place, but Info disappears from the bottom of the list. 
Adding a second one and dragging it after Destination causes Length which was
then the last one in the list) to disappear.  Same happens if I configure the
new columns (as Src Port / Source Port and Dst Port / Destination Port
respectively) before moving them, but that's not necessary to reproduce.

Alternately, if I do the same up to creating the first new column and moving it
between Source and Destination (which loses 'Info'), then move the same column
again, to between No. and Time, then Destination (which was after the new
column) disappears, instead of length (which was at the end of the list).  

I can get the whole list (other than the moved column) to evaporate just by
moving the one column around. 

Possibly something is being overzealous in deleting the entry from a linked
list?

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