[GNC] Gnucash 5.13 crashes after aborting new database setup

[James Ralston]

(I tried to report this in Bugzilla, but attempting to open
bugzilla.gnucash.org either fails with ICMP port unreachable, or else
opens the generic Fedora Apache httpd index.html file.  So I’m
assuming the battle against the AI bots is ongoing.)

Starting with GnuCash 5.13, if you create a new database, but click
“Cancel” in the “New Account Hierarchy Setup” window at the very first
window, then the resulting GnuCash instance will crash (with SIGSEGV)
when you attempt to either quit the program, or else open a saved
database.

I noticed this change because I frequently work on multiple GnuCash
databases at the same time, by launching GnuCash multiple times.  My
procedure for getting the new GnuCash instance to open the database I
want is:

* Launch GnuCash, which opens database #1
* Launch GnuCash, which attempts to open database #1
* Wait for the “Could not obtain lock” window
* Select “Create New File”
* Wait for the “New Account Hierarchy Setup” window
* Click “Cancel”
* Open the “File” menu and pick database #2

In retrospect, this is probably faster:

* Launch GnuCash, which opens database #1
* Launch GnuCash, which attempts to open database #1
* Wait for the “Could not obtain lock” window
* Click “Open Read-Only”
* Open the “File” menu and pick the database I want to open

But I went with my current method because I didn’t want the second
GnuCash instance to attempt to touch an already-open database at all,
even in read-only mode.

I have a work-around.  But even even if GnuCash doesn’t expect to user
to begin to create a new database and then immediately abort that
process, it shouldn’t crash with SIGSEGV.

>From skimming the 5.13 release notes, I don’t see any obvious bugfixes
that look like they could have caused a regression related to
switching accounts, except possibly this one:

* Bug 799249 - Crash while switch to recently opened file

But that’s just a wild guess.

I’m using gnucash-5.13-1.fc41.x86_64 (the official Fedora GnuCash
packages) on Fedora 41.