I am running Toad for Oracle 220.127.116.11, with an Oracle 12.1 64-bit client on Windows 7 64-bit. As of the last version of Toad, I was getting this crash about once every two or three days of regular use. Since updating to 18.104.22.168, this is happening about twice a day, especially if I let my machine idle for an hour or two before attempting to use Toad again.
This crash doesn't give me the option to submit a bug report and nothing is written to the Toad log file (toad.el).
Eureka log: [View:/cfs-file/__key/communityserver-discussions-components-files/10/7180.Toad.log:320:240]