Segfault/AV on incorrect databases.conf starting with subconfig (without line alias=database_path)

[basid-irk]

Firebird 3+ fall with segfault/AV on incorrect database.conf with alone DPB, f.e.:

#security.db = $(dir_secDb)/security3.fdb
{
  RemoteAccess = false
  DefaultDbCachePages = 320
  LockMemSize = 2M
}