[New-bugs-announce] [issue1685] linecache .updatecache fails on utf8 encoded files

[PyScripter]

New submission from PyScripter:

linecache.updatecache works as follows after it finds a module name:

fp = open(fullname, 'rU')
lines = fp.readlines()
fp.close()

It then tries to detect a file encoding comment...

The problem is that readlines fails with a UnicodeDecodeError if the 
file is utf8 encoded, the preferred locale encoding is something else 
and the file contains characters that cannot be decoded.

Instead the function should:
a) read the raw data into a bytes object 
b)then search for a file encoding comment and
c)use one if found else use utf8 since this is not the default file 
encoding.

----------
components: Library (Lib)
messages: 58958
nosy: pyscripter
severity: normal
status: open
title: linecache .updatecache fails on utf8 encoded files
versions: Python 3.0

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Tracker <report at bugs.python.org>
<http://bugs.python.org/issue1685>
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