[GNC] GnuCash 2.6.12 aborts (core dump) on Ubuntu 16 "hash table assertion failed"

[GWB]

Hello, GnuCash Users,

Gnucash will begin to start, then abort (crash) when launched, using
normal startup or gnucash --nofile --debug.  Output from terminal is:

$ gnucash --nofile --debug
Found Finance::Quote version 1.38
**
GLib:ERROR:/build/glib2.0-pjKWYQ/glib2.0-2.48.2/./glib/ghash.c:373:g_hash_table_lookup_node:
assertion failed: (hash_table->ref_count > 0)
Aborted (core dumped)

So this is some kind of hash table assertion failure?  I have the
gnucash.trace and apport bug reports as well, but before I send them I
thought I would ask if someone else has seen this.  I can rollback to
an earlier version of the file, but I would like to get this
particular version working now.

I might also copy the file to a Windows machine, and install GnuCash
there.  Or, possible, copy and upgrade to GnuCash 3, and then try to
figure out how to move my reports.

Any help is greatly appreciated!

Thanks,

Gordon Bynum