I seem to have stumbled upon a bug. When a user password is about to expire the normal ORA-28002 error is displayed but is immediately followed by a "/ by zero" error. Any subsequent queries in Sql Worksheet fails with the same error.
Oracle SQL Developer 220.127.116.11
This only appears to happen when the Tools -> Preferences -> Database -> Advanced -> Use OCI/Think driver option is checked
I seem to have stumbled upon a bug.
Then please mark the thread ANSWERED and report the bug to Oracle via your MOS account.
The forums can't help you with bugs.