Yeah, I have already tried to downgrade some packages like it was suggested on the forum, but it didn't help. 

сб, 25 нояб. 2017 г. в 0:32, Wolfgang Pfeiffer <roto@gmx.net>:
On Fri, 24 Nov 2017 10:11:41 +0000
Kseniya Blashchuk <ksyblast@gmail.com> wrote:

> The printer has always been working before, Canon IR2520. After
> upgrade to 27 the job is hanging in "Processing" state, and the
> printers application crashes. I see some errors in the logs like:
>
> Nov 24 13:08:14 ksy kernel: cnpkmoduleufr2[3582]: segfault at 0 ip
> 00000000f7d73d33 sp 00000000ff962d80 error 4 in libc-2.26.so
> [f7ce5000+1ba000]

Looks like similar to this one:
https://forum.manjaro.org/t/cnpkmoduleufr2-segfaults-unable-to-print/31336

Searching for cnpkmoduleufr2 might yield more on it ...

HTH
Wolfgang

>
> and then stack trace:
>
> Nov 24 13:08:33 ksy systemd-coredump[3594]: Process 3364
> (gnome-control-c) of user 1000 dumped core.
>
>                                             Stack trace of thread
> 3364: #0  0x00007f7b92b83e87
> slab_allocator_free_chunk (libglib-2.0.so.0)
>                                             #1  0x00007f7b92b84476
> magazine_cache_push_magazine (libglib-2.0.so.0)
>                                             #2  0x00007f7b92b85916
> g_slice_free_chain_with_offset (libglib-2.0.so.0)
>                                             #3  0x00007f7b9460b2ca
> _gtk_builder_parser_parse_buffer (libgtk-3.so.0)
>
> I tried to look for a bug but haven't found any. Does anybody have
> the same?
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