[Python-bugs-list] [ python-Bugs-416906 ] readlines() corrupts file opened for 'a'
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Wed, 18 Apr 2001 02:39:03 -0700
Bugs item #416906, was updated on 2001-04-17 18:10
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
>Assigned to: Guido van Rossum (gvanrossum)
Summary: readlines() corrupts file opened for 'a'
Initial Comment:
Version 2.1 final release for Windows (using Idle)
Windows 98 2nd edition
f=open('c:\My Documents\textfile.txt', 'a')
f.write('hello file\n')
f.readlines()
raises the following error - it probably should.
Traceback (most recent call last):
File "<pyshell#6>", line 1, in ?
f.readlines()
IOError: [Errno 9] Bad file descriptor
However, the file gets a bunch of garbage appended to
it. In some cases, the entire contents of the GUI
window gets appended.
In Redhat 6.2 (also with Version 2.1 Final)the same
code just erases the file.
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>Comment By: Tim Peters (tim_one)
Date: 2001-04-18 02:39
Message:
Logged In: YES
user_id=31435
Back to you, Guido: you're the one fond of arguing that MS
is within its rights to do anything whatsoever when the
rules for C stdio are broken <wink>.
Seriously, MS won't "fix" this (they'll deny it's broken).
Same kind of thing happens in straight C under MS.
BTW, note that Anonymous did not claim it's an MS bug: two
different bugs were claimed (Win98SE appends crap, RH 6.2
destroys the whole file).
I don't see a realistic choice here but to say "hmm --
tough luck, don't do that".
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Comment By: Guido van Rossum (gvanrossum)
Date: 2001-04-17 21:17
Message:
Logged In: YES
user_id=6380
Assigned to Tim, because he believes that this is a
Microsoft bug.
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