**Added:** * **Changed:** * **Deprecated:** * **Removed:** * **Fixed:** * Run control files are now read in with ``$THREAD_SUBPROCS`` off. This prevents a weird error when starting xonsh from Bash (and possibly other shells) where the top-level xonsh process would be stopped and placed into the background during startup. It may be necessary to set ``$THREAD_SUBPROCS=False`` in downstream xonsh scripts and modules. **Security:** *