Chris Murphy writes:
Please try to install debuginfo manually using the command:
"debuginfo-install flatpak-1.4.1-1.fc30" and try again.
That's your key piece of info. You're missing the debuginfo package, without
it the backtrace has no info.
With a native, directly-installed RPM, the debug repo gets automatically
enabled, and the debuginfo packages gets automatically fetched and
installed. I guess with flatpacks, this is not automatic. Don't know much
about flatpaks, but this is what you need to figure out how to make it
happen.