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Originally discovered/reported in#598 (fixing somewhat the situation but not really).
(Pdb) bt /usr/lib/python2.7/unittest/case.py(329)run()-> testMethod() /usr/lib/python2.7/dist-packages/nose/loader.py(418)loadTestsFromName()-> addr.filename, addr.module) /usr/lib/python2.7/dist-packages/nose/importer.py(47)importFromPath()-> return self.importFromDir(dir_path, fqname) /usr/lib/python2.7/dist-packages/nose/importer.py(94)importFromDir()-> mod = load_module(part_fqname, fh, filename, desc) /home/buildbot/datalad-pr-docker-dl-nd90/build/datalad/tests/test__main__.py(17)<module>()-> from .. import __main__, __version__ /home/buildbot/datalad-pr-docker-dl-nd90/build/datalad/__main__.py(13)<module>()-> from .auto import AutomagicIO /home/buildbot/datalad-pr-docker-dl-nd90/build/datalad/auto.py(20)<module>()-> import h5py /usr/lib/python2.7/dist-packages/h5py/__init__.py(60)<module>()-> from .tests import run_tests /usr/lib/python2.7/dist-packages/h5py/tests/__init__.py(15)<module>()-> from . import old, hl /usr/lib/python2.7/dist-packages/h5py/tests/old/__init__.py(4)<module>()-> from . import ( test_attrs, /usr/lib/python2.7/dist-packages/h5py/tests/old/test_group.py(41)<module>()-> fsencode(u"α") /usr/lib/python2.7/dist-packages/h5py/_hl/compat.py(68)fsencode()-> return filename.encode(encoding, errors) /usr/lib/python2.7/dist-packages/git/compat.py(180)surrogateescape_handler()-> decoded = replace_surrogate_encode(mystring)> /usr/lib/python2.7/dist-packages/git/compat.py(207)replace_surrogate_encode()-> raise excas you can see -- there is no import ofgit anywhere in the stack (was imported some time before) and thesurrogateescape_handler kicks in, and then fails in a "non standard way". If it does provide some custom handling, IMHO whatever exception it could ever throw should be a subclass of possibly expected "upstairs"UnicodeEncodeError. Here is a bit more detail from the stack
(Pdb) l202 code = ord(ch)203 204 # The following magic comes from Py3.3's Python/codecs.c file:205 if not 0xD800 <= code <= 0xDCFF:206 # Not a surrogate. Fail with the original exception.207 -> raise exc208 # mybytes = [0xe0 | (code >> 12),209 # 0x80 | ((code >> 6) & 0x3f),210 # 0x80 | (code & 0x3f)]211 # Is this a good idea?212 if 0xDC00 <= code <= 0xDC7F:(Pdb) p code945(Pdb) up> /usr/lib/python2.7/dist-packages/git/compat.py(180)surrogateescape_handler()-> decoded = replace_surrogate_encode(mystring)(Pdb) p mystringu'\u03b1'(Pdb) up> /usr/lib/python2.7/dist-packages/h5py/_hl/compat.py(68)fsencode()-> return filename.encode(encoding, errors)(Pdb) p filenameu'\u03b1'(Pdb) up> /usr/lib/python2.7/dist-packages/h5py/tests/old/test_group.py(41)<module>()-> fsencode(u"α")(Pdb) l 38 # If we can't encode unicode filenames, there's not much point failing tests 39 # which must fail 40 try: 41 fsencode(u"α") 42 except UnicodeEncodeError: 43 -> NO_FS_UNICODE = True 44 else: 45 NO_FS_UNICODE = False 46 47 48 class BaseGroup(TestCase):