Comment 2 for bug 1939230

I'm having same issue on Ubuntu 20.04.03. Running DevStack from stable/victoria branch.

jpo@jpo-test:~/devstack$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal

Using python 3.8 to install os-testr
+inc/python:pip_install:193 sudo -H LC_ALL=en_US.UTF-8 SETUPTOOLS_USE_DISTUTILS=stdlib http_proxy= https_proxy= no_proxy= PIP_FIND_LINKS= SETUPTOOLS_SYS_PATH_TECHNIQUE=rewrite python3.8 -m pip install -c /opt/stack/requirements/upper-constraints.txt -U os-testr
DEPRECATION: Constraints are only allowed to take the form of a package name and a version specifier. Other forms were originally permitted as an accident of the implementation, but were undocumented. The new implementation of the resolver no longer supports these forms. A possible replacement is replacing the constraint with a requirement. You can find discussion regarding this at https://github.com/pypa/pip/issues/8210.
ERROR: Editable requirements are not allowed as constraints
+inc/python:pip_install:1 exit_trap
+./stack.sh:exit_trap:496 local r=1
++./stack.sh:exit_trap:497 jobs -p
+./stack.sh:exit_trap:497 jobs=
+./stack.sh:exit_trap:500 [[ -n '' ]]
+./stack.sh:exit_trap:506 '[' -f '' ']'
+./stack.sh:exit_trap:511 kill_spinner
+./stack.sh:kill_spinner:406 '[' '!' -z '' ']'
+./stack.sh:exit_trap:513 [[ 1 -ne 0 ]]
+./stack.sh:exit_trap:514 echo 'Error on exit'
Error on exit
+./stack.sh:exit_trap:516 type -p generate-subunit
+./stack.sh:exit_trap:517 generate-subunit 1631878217 42 fail
./stack.sh: line 517: /opt/stack/devstack.subunit: Permission denied
jpo@jpo-test:~/devstack$