Synapse core dumps often in Arch Linux

[Nacho G]

Launching synapse in Arch Linux fails more often than not with the following error:

$ synapse
[INFO 17:08:56.235061] [synapse-main:267] Starting up...
[INFO 17:08:56.457804] [synapse-main:209] Binding activation to <Alt>space
[INFO 17:08:56.458167] [view-base:144] Using KWin compatibility mode.
[INFO 17:08:56.478187] [view-base:251] Screen is composited.
[INFO 17:08:56.478526] [controller:56] Using gtk-im-context-simple input method.
[FATAL 17:08:56.487963] [Gdk] gdk_window_shape_combine_region: assertion 'GDK_IS_WINDOW (window)' failed
[FATAL 17:08:56.489828] [Gdk] gdk_window_shape_combine_region: assertion 'GDK_IS_WINDOW (window)' failed
free(): invalid next size (fast)
Aborted (core dumped)

==============================================

In comparison, a successful launch would be:
$ synapse
[INFO 17:29:02.583300] [synapse-main:267] Starting up...
[INFO 17:29:02.808745] [synapse-main:209] Binding activation to <Alt>space
[INFO 17:29:02.809077] [view-base:144] Using KWin compatibility mode.
[INFO 17:29:02.827300] [view-base:251] Screen is composited.
[INFO 17:29:02.827619] [controller:56] Using gtk-im-context-simple input method.
[FATAL 17:29:02.836356] [Gdk] gdk_window_shape_combine_region: assertion 'GDK_IS_WINDOW (window)' failed
[FATAL 17:29:02.838866] [Gdk] gdk_window_shape_combine_region: assertion 'GDK_IS_WINDOW (window)' failed
[WARN 17:29:02.946497] [desktop-file-service:200] Not Application-type desktop entry
[WARN 17:29:02.952548] [desktop-file-service:200] Unable to get exec for QEMU
[WARN 17:29:02.994327] [ssh-plugin:114] /home/user/.ssh/config: Error opening file /home/user/.ssh/config: No such file or directory
[INFO 17:29:03.198584] [hybrid-search-plugin:179] keeps in cache now 345 file names

==============================================

I have attached the recovered core dump.

System information:
Operating System: Arch Linux
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2
Kernel Version: 5.4.94-1-lts
OS Type: 64-bit
Processors: 24 × AMD Ryzen 9 3900X 12-Core Processor
Memory: 31.3 GiB of RAM
Graphics Processor: GeForce GTX 1650/PCIe/SSE2

Package information:
$ pacman -Qi synapse
Name : synapse
Version : 0.2.99.4-2
Description : A semantic file launcher
Architecture : x86_64
URL : https://launchpad.net/synapse-project
Licenses : GPL3
Groups : None
Provides : None
Depends On : libkeybinder3 hicolor-icon-theme json-glib libgee libnotify zeitgeist rest xdg-utils
Optional Deps : bc: calculator plugin [installed]
                  devhelp: documentation plugin
                  gnome-dictionary: dictionary plugin
                  openssh: ssh plugin [installed]
                  pastebinit: pastebin plugin
                  rhythmbox: rhythmbox plugin
                  xnoise: xnoise plugin
Required By : None
Optional For : None
Conflicts With : None
Replaces : None
Installed Size : 1726.57 KiB
Packager : Felix Yan <email address hidden>
Build Date : Tue 07 Jul 2020 07:07:07 PM CEST
Install Date : Sat 07 Nov 2020 07:38:37 PM CET
Install Reason : Explicitly installed
Install Script : No
Validated By : Signature