Reprotest fails to run correctly due to files that are not marked
executable:

reprotest --verbose --vary=-fileordering,-domain_host,-user_group,-time -c 'date > date' . date -- null
WARNING:reprotest:The control build runs on 1 CPU by default, give --min-cpus to increase this.
WARNING:reprotest:diffoscope not available, falling back to regular diff
INFO:reprotest:STARTING VIRTUAL SERVER ['/gnu/store/7cglj9r39y4hfbwzd3rbh2rgl1yg343v-reprotest-0.7.28/lib/python3.10/site-packages/reprotest/virt/autopkgtest-virt-null']
Traceback (most recent call last):
  File "/gnu/store/7cglj9r39y4hfbwzd3rbh2rgl1yg343v-reprotest-0.7.28/lib/python3.10/site-packages/reprotest/__init__.py", line 862, in run
    return 0 if check_func(*check_args) else 1
  File "/gnu/store/7cglj9r39y4hfbwzd3rbh2rgl1yg343v-reprotest-0.7.28/lib/python3.10/site-packages/reprotest/__init__.py", line 370, in check
    proc = test_args._replace(result_dir=result_dir).corun_builds(testbed_args)
  File "/gnu/store/7cglj9r39y4hfbwzd3rbh2rgl1yg343v-reprotest-0.7.28/lib/python3.10/site-packages/reprotest/__init__.py", line 114, in start
    next(cr)
  File "/gnu/store/7cglj9r39y4hfbwzd3rbh2rgl1yg343v-reprotest-0.7.28/lib/python3.10/site-packages/reprotest/__init__.py", line 322, in corun_builds
    with start_testbed(virtual_server_args, temp_dir, no_clean_on_error,
  File "/gnu/store/50047r6f9chb6dwd01f9hai90y9arwb4-python-3.10.7/lib/python3.10/contextlib.py", line 135, in __enter__
    return next(self.gen)
  File "/gnu/store/7cglj9r39y4hfbwzd3rbh2rgl1yg343v-reprotest-0.7.28/lib/python3.10/site-packages/reprotest/__init__.py", line 85, in start_testbed
    testbed.start()
  File "/gnu/store/7cglj9r39y4hfbwzd3rbh2rgl1yg343v-reprotest-0.7.28/lib/python3.10/site-packages/reprotest/lib/adt_testbed.py", line 134, in start
    self.sp = subprocess.Popen(self.vserver_argv,
  File "/gnu/store/50047r6f9chb6dwd01f9hai90y9arwb4-python-3.10.7/lib/python3.10/subprocess.py", line 969, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/gnu/store/50047r6f9chb6dwd01f9hai90y9arwb4-python-3.10.7/lib/python3.10/subprocess.py", line 1845, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
PermissionError: [Errno 13] Permission denied: '/gnu/store/7cglj9r39y4hfbwzd3rbh2rgl1yg343v-reprotest-0.7.28/lib/python3.10/site-packages/reprotest/virt/autopkgtest-virt-null'

The reprotest version 0.7.21 included in guix v1.4.0 did have these
files marked executable, but for some reason in recent versions (maybe
changes in pyproject-build-system?), they are shipped without the
execute bit set. I have not git bisected between all the versions of
guix to see exactly where it starts failing.

CCed members of the python team if they have ideas about changes in the
build system which might cause the issue.

The attached patch marks the necessary files are executable with an
added phase. Open to refactorring the patch, but my guile skills are
quite limited and this works!


live well,
  vagrant