New submission from Antoine Pitrou <pit...@free.fr>:
Opening an existing file in read-only text mode and trying to write to it:
>>> f = open("LICENSE")
>>> f.write("")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
SystemError: null argument to internal routine
Binary files get it right though:
>>> f = open("LICENSE", "rb")
>>> f.write("")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
io.UnsupportedOperation: write
----------
components: IO
messages: 86700
nosy: pitrou
priority: critical
severity: normal
status: open
title: TextIOWrapper: bad error reporting when write() is forbidden
type: behavior
versions: Python 3.1
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue5860>
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