python - os.copystat fails on panfs when u+w not set on src, causing pip install to fail; where to report a bug? -

i'm doing pip install ., current working directory on panfs filesystem. when pip tries copy directory tree, including files in .git, fails due failure in os.setxattr:

$ pip install . processing /home/users/gholl/checkouts/pyatmlab exception: traceback (most recent call last):   file "/home/users/gholl/venv/stable-3.4/lib/python3.4/site-packages/pip/basecommand.py", line 223, in main     status = self.run(options, args)   file "/home/users/gholl/venv/stable-3.4/lib/python3.4/site-packages/pip/commands/install.py", line 280, in run     requirement_set.prepare_files(finder)   file "/home/users/gholl/venv/stable-3.4/lib/python3.4/site-packages/pip/req/req_set.py", line 317, in prepare_files     functools.partial(self._prepare_file, finder))   file "/home/users/gholl/venv/stable-3.4/lib/python3.4/site-packages/pip/req/req_set.py", line 304, in _walk_req_to_install     more_reqs = handler(req_to_install)   file "/home/users/gholl/venv/stable-3.4/lib/python3.4/site-packages/pip/req/req_set.py", line 469, in _prepare_file     session=self.session)   file "/home/users/gholl/venv/stable-3.4/lib/python3.4/site-packages/pip/download.py", line 814, in unpack_url     unpack_file_url(link, location, download_dir)   file "/home/users/gholl/venv/stable-3.4/lib/python3.4/site-packages/pip/download.py", line 699, in unpack_file_url     shutil.copytree(link_path, location, symlinks=true)   file "/home/users/gholl/lib/python3.4/shutil.py", line 343, in copytree     raise error(errors) shutil.error: [('/home/users/gholl/checkouts/pyatmlab/.git/objects/pack/pack-c1449559ec4287b3830efe2913608dddf2f21391.pack', '/tmp/pip-6lrnz9vs-build/.git/objects/pack/pack-c1449559ec4287b3830efe2913608dddf2f21391.pack', "[errno 13] permission denied: '/tmp/pip-6lrnz9vs-build/.git/objects/pack/pack-c1449559ec4287b3830efe2913608dddf2f21391.pack'"), ('/home/users/gholl/checkouts/pyatmlab/.git/objects/pack/pack-c1449559ec4287b3830efe2913608dddf2f21391.idx', '/tmp/pip-6lrnz9vs-build/.git/objects/pack/pack-c1449559ec4287b3830efe2913608dddf2f21391.idx', "[errno 13] permission denied: '/tmp/pip-6lrnz9vs-build/.git/objects/pack/pack-c1449559ec4287b3830efe2913608dddf2f21391.idx'")] 

some deeper digging shows error originates in:

traceback (most recent call last):   file "/home/users/gholl/lib/python3.4/shutil.py", line 329, in copytree     copy_function(srcname, dstname)   file "/home/users/gholl/lib/python3.4/shutil.py", line 246, in copy2     copystat(src, dst, follow_symlinks=follow_symlinks)   file "/home/users/gholl/lib/python3.4/shutil.py", line 213, in copystat     _copyxattr(src, dst, follow_symlinks=follow)   file "/home/users/gholl/lib/python3.4/shutil.py", line 153, in _copyxattr     os.setxattr(dst, name, value, follow_symlinks=follow_symlinks) permissionerror: [errno 13] permission denied: '/tmp/pip-y3dw8fwa-build/.git/objects/pack/pack-c1449559ec4287b3830efe2913608dddf2f21391.pack'  file "/home/users/gholl/lib/python3.4/shutil.py", line 329, in copytree 

...and can reproduced by:

in [55]: shutil.copystat("/home/users/gholl/checkouts/pyatmlab/.git/objects/pack/pack-c1449559ec4287b3830efe2913608dddf2f21391.pack", "/tmp/fubar") --------------------------------------------------------------------------- permissionerror                           traceback (most recent call last) <ipython-input-55-139c9fc77184> in <module>() ----> 1 shutil.copystat("/home/users/gholl/checkouts/pyatmlab/.git/objects/pack/pack-c1449559ec4287b3830efe2913608dddf2f21391.pack", "/tmp/fubar")  /home/users/gholl/lib/python3.4/shutil.py in copystat(src, dst, follow_symlinks)     211             else:     212                 raise --> 213     _copyxattr(src, dst, follow_symlinks=follow)     214     215 def copy(src, dst, *, follow_symlinks=true):  /home/users/gholl/lib/python3.4/shutil.py in _copyxattr(src, dst, follow_symlinks)     151             try:     152                 value = os.getxattr(src, name, follow_symlinks=follow_symlinks) --> 153                 os.setxattr(dst, name, value, follow_symlinks=follow_symlinks)     154             except oserror e:     155                 if e.errno not in (errno.eperm, errno.enotsup, errno.enodata):  permissionerror: [errno 13] permission denied: '/tmp/fubar' 

this occurs source file user write bit not set.

now, should handle this? bug in pip, shutil.copytree, shutil.copystat, setxattr, panfs, or none of above?