[issue12784] Concatenation of strings returns the wrong string

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> Note how the ascii codes for the faulty characters only differ by one
> bit, and only the 5th least significant bit.

This looks very much like a hardware issue.
Python usually does nothing special with the 5th bit of characters. Also, the IO system and string objects are different in 2.6 and 3.1, so witnessing the same behaviour under both versions points to a likely external cause.

Could you try on another system?

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<http://bugs.python.org/issue12784>
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