Gnome-software is (still) crashing with a segfault on my up-to-date install (17.3 Pro). It works fine from terminal with sudo gnome-software, so perhaps its some file permissions issue (as my googling suggests)
Can anyone suggest a way to debug this?
GDB appears, in principle, to be an option but as far as I can tell requires me to compile a debug-compatible version which I don't currently know how to do, or if it's even sensible.
I would prefer to read the log files for clues rather than dive into an actual debugger. If you open a command line and type journalctl -xe there will be some output about the last messages logged in the system. Try running this shortly after this issue has happened.
Also, try running the Software store through the command line, without sudo, to see if there are any interesting application-specific messages.