gedit replace `\n` to `,` high cpu use, and long time no response

[公输目]

the same data, same replace, notepad++ very quickly

and regex model replace crash

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: gedit 3.18.3-0ubuntu4
ProcVersionSignature: Ubuntu 4.4.0-57.78-generic 4.4.35
Uname: Linux 4.4.0-57-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.4
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Dec 26 16:29:42 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-04-22 (614 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: gedit
UpgradeStatus: Upgraded to xenial on 2016-08-02 (145 days ago)

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue you are reporting is an upstream one and it would be nice if somebody having it could send the bug to the developers of the software by following the instructions at https://wiki.ubuntu.com/Bugs/Upstream/GNOME. If you have done so, please tell us the number of the upstream bug (or the link), so we can add a bugwatch that will inform us about its status. Thanks in advance.

[公输目 (yue937)]

https://bugzilla.gnome.org/show_bug.cgi?id=776786

report it to upstream

[Paul White (paulw2u)]

We are sorry that we do not always have the capacity to review all reported bugs in a timely manner.

yue937, the upstream bug report has been closed as "RESOLVED INCOMPLETE" as the developers needed more information in order to investigate the bug. Do you still see the problem that you reported? If so, is it a large file? Do you have a sample file that you can attach?

Thank you for helping make Ubuntu better.

Paul White
[Ubuntu Bug Squad]

[Paul White (paulw2u)]

Bug will not expire due to bug watch
Upstream issue closed 2017-09-14 as no reply to request for further information
No reply to comment #4 so closing

@yue937, please comment here and upstream if see this issue again in a current or future Ubuntu release