[issue6393] OS X: python3 from python-3.1.dmg crashes at startup
Ned Deily
report at bugs.python.org
Thu Jul 9 05:55:42 CEST 2009
Ned Deily <nad at acm.org> added the comment:
Note, you can produce the same error on OS X or linux by setting
PYTHONIOENCODING="", which effectively overrides the value returned
nl_langinfo(CODESET). In pythonrun.c, create_stdio passes
PYTHONENCODING, if set, on as the "encoding" value to TextIOWrapper. If
no encoding was specified, TextIOWrapper uses the value returned by
locale.getpreferrencoding(). It then calls PyCodec_IncrementalDecoder
and the unknown (or empty) encoding is finally detected.
That raises the question of how far python should go in protecting the
user. One *could* add a check in pythonrun.c to substitute some
suitable default (UTF-8) if nl_langinfo(CODESET) returns an empty value.
Or perhaps just abort there with a more meaningful error message.
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