From terminal:
$ deluge-gtk
**
Pango:ERROR:../pango/pango/pangofc-fontmap.c:1933:pango_fc_make_pattern: code should not be reached
Bail out! Pango:ERROR:../pango/pango/pangofc-fontmap.c:1933:pango_fc_make_pattern: code should not be reached
Aborted (core dumped)
from /var/log/pacman.log
[2021-12-11T06:25:39-0800] [ALPM] upgraded pango (1:1.48.10-1 -> 1:1.50.0-3)
Has been running fine for weeks… … … .
Hello @keepitsimpleengineer 
I checked the dependencies of deluge and deluge-gtk, but there is no dependency listed, called “pango”. So I assume it must be a problem of an outdated plugin?
svntogit-packages/PKGBUILD at packages/deluge · archlinux/svntogit-packages · GitHub
I just did a quick test on my end on unstable/testing. Starts there fine. Please check if you have some AUR package …
pango is required by gtk3 & gtk3 is required by deluge-gtk
$ sudo pacman -Qii pango
Name : pango
Version : 1:1.50.0-3
Description : A library for layout and rendering of text
Architecture : x86_64
URL : https://www.pango.org/
Licenses : LGPL
Groups : None
Provides : libpango-1.0.so=0-64 libpangocairo-1.0.so=0-64 libpangoft2-1.0.so=0-64 libpangoxft-1.0.so=0-64
Depends On : libthai cairo libxft harfbuzz fribidi
Optional Deps : None
Required By : cogl graphviz gst-plugins-bad gst-plugins-base gtk2 gtk3 gtk4 hexchat lib32-pango libreoffice-still librsvg libtiger
light-locker pangomm rrdtool thunderbird
Optional For : imagemagick lv2
Conflicts With : None
Replaces : None
Installed Size : 2.24 MiB
Packager : Jan Alexander Steffens (heftig) <heftig@archlinux.org>
Build Date : Tue 07 Dec 2021 02:36:28 AM PST
Install Date : Sat 11 Dec 2021 07:08:44 AM PST
Install Reason : Installed as a dependency for another package
Install Script : No
Validated By : Signature
Backup Files :
(none)
[ljohnson@KISE-055 yay]$ pwd
/home/ljohnson/.cache/yay
[ljohnson@KISE-055 yay]$ ls -lat
total 1872
-rw-r--r-- 1 ljohnson ljohnson 527 Dec 11 06:39 vcs.json
drwxr-xr-x 3 ljohnson ljohnson 4096 Dec 11 06:39 python2-enum34
&
[ljohnson@KISE-055 yay]$ cd python2-enum34
[ljohnson@KISE-055 python2-enum34]$ ls
001-setup.py.patch PKGBUILD python2-enum34-1.1.10-1-any.pkg.tar.zst python2-enum34-1.1.10.tar.gz
&
$ pacman -Qii python2-enum34
Name : python2-enum34
Version : 1.1.10-1
Description : Python 3.4 Enum backported
Architecture : any
URL : https://pypi.org/enum34
Licenses : BSD
Groups : None
Provides : None
Depends On : python2
Optional Deps : None
Required By : python2-cryptography
Optional For : None
Conflicts With : None
Replaces : None
Installed Size : 341.96 KiB
Packager : Unknown Packager
Build Date : Sat 11 Dec 2021 06:39:05 AM PST
Install Date : Sat 11 Dec 2021 06:39:15 AM PST
Install Reason : Installed as a dependency for another package
Install Script : No
Validated By : None
Backup Files :
https://aur.archlinux.org/packages/python2-enum34/
Python2 likely installed as required by mythtv (8 years old) and is no longer required. I removed python2-enum34.
Still loads and crashes…
$ deluge-gtk
**
Pango:ERROR:../pango/pango/pangofc-fontmap.c:1933:pango_fc_make_pattern: code should not be reached
Bail out! Pango:ERROR:../pango/pango/pangofc-fontmap.c:1933:pango_fc_make_pattern: code should not be reached
Aborted (core dumped)
Can confirm this, also happening on my machine.
Can confirm this, also happening on my machine.
Adding the comment to the bug report would be helpful 
So today (12/12/2021) a new Manjaro XFCE *.iso torrent is released.
When I add it after downloading it from the Internet, and Deluge starts up without the crash and runs as one would expect.
But still crashes when launched from the keyboard.