[issue5677] Serious interpreter crash and/or arbitrary memory leak using .read() on writable file

[Robert Xiao]

Robert Xiao <nneonneo at gmail.com> added the comment:

OK, it's not a memory leak, rather, it's something leaking from the
files. However, this still winds up filling the affected file full of
garbage, which is quite undesirable (and, I think, quite likely to be
unwanted behaviour, considering that *some* read methods throw IOError 9
and some others don't).

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<http://bugs.python.org/issue5677>
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