Uploading attachment fails

[student]

I just upgraded from ubuntu 14.04 to ubuntu 15.04. Since then uploading attachments using the attachment plugin doesn't work anymore in ikiwiki. It prints a "failed!" message. Any idea what may be wrong here and how to fix it?

ikiwiki version 3.20141016.2

/var/log/apache2/error.log

gives this:

Died at /usr/share/perl5/IkiWiki/CGI.pm line 497.

I already reported this on the ikiwiki bug tracker (http://ikiwiki.info/bugs/Uploading_attachment_fails/). The bug is perhaps already fixed in debian unstable. So please upgrade the ubuntu package too.

Here is the quote from the answer on the ikiwiki bug tracker:

    I think this is probably Debian bug #786587, which ikiwiki has worked around since 3.20150610 (Debian bug #786586). If so, then it is already fixed, but not in the version you have. You could report an Ubuntu bug asking for ikiwiki commit 7a52c87 or CGI.pm commit e4500cf to be backported, although in practice bugs in universe packages are unlikely to get fixed in an Ubuntu stable release.

    To work around this, you might be able to apt-get remove libcgi-pm-perl and use the older version of CGI.pm that is shipped with Perl. --smcv

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: ikiwiki 3.20141016.2
ProcVersionSignature: Ubuntu 3.19.0-22.22-generic 3.19.8-ckt1
Uname: Linux 3.19.0-22-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
Date: Wed Jul 1 10:17:43 2015
InstallationDate: Installed on 2013-11-22 (585 days ago)
InstallationMedia: Lubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
PackageArchitecture: all
SourcePackage: ikiwiki
UpgradeStatus: Upgraded to vivid on 2015-06-29 (2 days ago)

[Alex Muntada (alex.muntada)]

Sorry, I clicked on "Also affects project" instead of "Also affects distribution/package". Unfortunately LP doesn't understand ikiwiki's upstream bug links.