[issue7649] "u'%c' % char" broken for chars in range '\x80'-'\xFF'

[Ezio Melotti]

Ezio Melotti <ezio.melotti at gmail.com> added the comment:

I was trying to decode mainly to get a UnicodeDecodeError automatically.
If I check if the char is not in the ASCII range (i.e. >0x7F) I think I'd have to set the error message for the UnicodeDecodeError manually and possibly duplicate it (unless we use a different error message that says that %c accepts only ASCII chars).
Also I agree that if u'%s' % chr(0x80) works when the default encoding is not ASCII, then %c should work as well. Trying to decode it with the default encoding and possibly let the UnicodeDecodeError propagate seems a good solution to me (and performance shouldn't be a problem here, since apparently no one uses u'%c' with non-ASCII byte strings).
I will try to make another patch.

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<http://bugs.python.org/issue7649>
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