Out of bounds indizes in PEP293 callbacks

[doerwalter]

BPO	677429
Nosy	@malemburg, @gvanrossum, @doerwalter
Files	diff.txt

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/doerwalter'
closed_at = <Date 2003-01-31.17:29:23.000>
created_at = <Date 2003-01-30.11:43:06.000>
labels = []
title = 'Out of bounds indizes in PEP293 callbacks'
updated_at = <Date 2003-01-31.17:29:23.000>
user = 'https://github.com/doerwalter'

bugs.python.org fields:

activity = <Date 2003-01-31.17:29:23.000>
actor = 'doerwalter'
assignee = 'doerwalter'
closed = True
closed_date = None
closer = None
components = ['None']
creation = <Date 2003-01-30.11:43:06.000>
creator = 'doerwalter'
dependencies = []
files = ['4972']
hgrepos = []
issue_num = 677429
keywords = ['patch']
message_count = 4.0
messages = ['42592', '42593', '42594', '42595']
nosy_count = 3.0
nosy_names = ['lemburg', 'gvanrossum', 'doerwalter']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue677429'
versions = ['Python 2.3']

[doerwalter]

This patch changes the treatment of positions returned
by PEP-293 error handers in the Unicode codecs: Negative
positions are treated as being relative to the end of
the input and out of bounds positions result in an
IndexError. The patch also updates the PEP and includes
an explanation of this in the documentation for
codecs.register_error. I don't know if this is the best
spot for it, or if it should be put somewhere else.

[gvanrossum]

Logged In: YES
user_id=6380

Since this says "codec" I've assigned it to Marc-Andre. :-)

Marc-Andre, if you don't have time, feel free to unassign it.

[malemburg]

Logged In: YES
user_id=38388

... and I thought Unicode was the keyword ;-)

I fully trust Walter on the error handler callbacks, so I'll
pass it on to him.

[doerwalter]

Logged In: YES
user_id=89016

Checked in as:
Doc/lib/libcodecs.tex 1.17
Doc/lib/libfuncs.tex 1.128
Lib/test/test_codeccallbacks.py 1.9
Modules/_iconv_codec.c 1.7
Objects/unicodeobject.c 2.180
nondist/peps/pep-0293.txt 1.7