wget segfaults when downloading filename with Russian characters

[Alexander List]

I tried to download an attachment from Launchpad.

wget didn't like it and segfaulted...

$ wget "https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+attachment/4649672/+files/%D0%A1%D0%BD%D0%B8%D0%BC%D0%BE%D0%BA%20%D1%8D%D0%BA%D1%80%D0%B0%D0%BD%D0%B0%20%D0%BE%D1%82%202016-04-28%2008-21-35.png"
--2016-04-28 12:53:28-- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+attachment/4649672/+files/%D0%A1%D0%BD%D0%B8%D0%BC%D0%BE%D0%BA%20%D1%8D%D0%BA%D1%80%D0%B0%D0%BD%D0%B0%20%D0%BE%D1%82%202016-04-28%2008-21-35.png
Resolving bugs.launchpad.net (bugs.launchpad.net)... 91.189.89.225, 91.189.89.224
Connecting to bugs.launchpad.net (bugs.launchpad.net)|91.189.89.225|:443... connected.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: https://launchpadlibrarian.net/256821437/%D0%A1%D0%BD%D0%B8%D0%BC%D0%BE%D0%BA%20%D1%8D%D0%BA%D1%80%D0%B0%D0%BD%D0%B0%20%D0%BE%D1%82%202016-04-28%2008-21-35.png [following]
--2016-04-28 12:53:29-- https://launchpadlibrarian.net/256821437/%D0%A1%D0%BD%D0%B8%D0%BC%D0%BE%D0%BA%20%D1%8D%D0%BA%D1%80%D0%B0%D0%BD%D0%B0%20%D0%BE%D1%82%202016-04-28%2008-21-35.png
Resolving launchpadlibrarian.net (launchpadlibrarian.net)... 91.189.89.229, 91.189.89.228
Connecting to launchpadlibrarian.net (launchpadlibrarian.net)|91.189.89.229|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 240409 (235K) [image/png]
Saving to: ‘Снимок \321%8Dк\321%80ана о\321%82 2016-04-28 08-21-35.png.2’

Segmentation fault (core dumped)

The file is an attachment to this comment:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/comments/19

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: wget 1.17.1-1ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Apr 28 12:54:28 2016
InstallationDate: Installed on 2015-07-04 (298 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
SourcePackage: wget
UpgradeStatus: Upgraded to xenial on 2016-04-26 (2 days ago)