The "/test-warning" page:

Test error and warning log operation.  This webpage is accessible to
the administrator only.

    case=1           Issue a fossil_warning() while generating the page.
    case=2           Extra db_begin_transaction()
    case=3           Extra db_end_transaction()
    case=4           Error during SQL processing
    case=5           Call the segfault handler
    case=6           Call webpage_assert()
    case=7           Call webpage_error()