New submission from Florent Xicluna <florent.xicl...@gmail.com>:
I've hit this issue while playing with tokenize for the pep8.py module.
The tokenize detect_encoding() should report SyntaxError when the encoding is
improperly declared.
However it raises a LookupError in some cases.
$ ./python -m tokenize Lib/test/bad_coding2.py
unexpected error: unknown encoding: utf8-sig
Traceback (most recent call last):
File "./Lib/runpy.py", line 162, in _run_module_as_main
"__main__", fname, loader, pkg_name)
File "./Lib/runpy.py", line 75, in _run_code
exec(code, run_globals)
File "./Lib/tokenize.py", line 686, in <module>
main()
File "./Lib/tokenize.py", line 656, in main
tokens = list(tokenize(f.readline))
File "./Lib/tokenize.py", line 489, in _tokenize
line = line.decode(encoding)
LookupError: unknown encoding: utf8-sig
----------
components: Library (Lib)
messages: 162205
nosy: flox
priority: normal
severity: normal
stage: needs patch
status: open
title: detect_encoding should fail with SyntaxError on invalid encoding
type: behavior
versions: Python 3.1, Python 3.2, Python 3.3
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue14990>
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