A Tor commit seems to have broken creation of V3 onion services with stem
The commit in question is this.
Here is a bash script that helps reproduce the bug. By default the script uses the last working commit. Comment line 22 and uncomment line 23 and run it again to see how the python script launched by the bash script is unable to bring V3 onion service online with stem.
Trac:
Username: maqp