traceback module caches sources invalid

[hyeshik]

BPO	737473
Nosy	@mwhudson, @hyeshik
Files	test_tracebackreload.py: test script traceback-patch.diff: patch to both of traceback and linecache module.

^{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/hyeshik'
closed_at = <Date 2004-10-26.09:18:36.000>
created_at = <Date 2003-05-14.05:44:46.000>
labels = ['library']
title = 'traceback module caches sources invalid'
updated_at = <Date 2004-10-26.09:18:36.000>
user = 'https://github.com/hyeshik'

bugs.python.org fields:

activity = <Date 2004-10-26.09:18:36.000>
actor = 'hyeshik.chang'
assignee = 'hyeshik.chang'
closed = True
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2003-05-14.05:44:46.000>
creator = 'hyeshik.chang'
dependencies = []
files = ['5305', '5306']
hgrepos = []
issue_num = 737473
keywords = ['patch']
message_count = 4.0
messages = ['43787', '43788', '43789', '43790']
nosy_count = 3.0
nosy_names = ['mwh', 'hyeshik.chang', 'falsetru']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue737473'
versions = ['Python 2.4']

[hyeshik]

traceback.{extract,print}_tb function doesn't check
source code's mtime validity.
attached script copies the bug situation.

[falsetru]

Logged In: YES
user_id=1004332

tested on Linux 2.6.7, attached test_tracebackreload.py passed.

btw, test_tracebackreload.py don't remove temporary file.

[mwhudson]

Logged In: YES
user_id=6656

Check it in already! I've been wanting to do something about this
for years...

One of the things stopping me was wanting to take the time to
check whether it's worth bothering with linecache at all in
traceback -- but this'll do :-)

[hyeshik]

Logged In: YES
user_id=55188

Thanks for reviews, mwh and falsetru!

Checked in:
Doc/lib/liblinecache.tex 1.6
Lib/linecache.py 1.13
Lib/traceback.py 1.31
Lib/test/test_traceback.py 1.8
Misc/NEWS 1.1177