[issue10557] Malformed error message from float()
Alexander Belopolsky
report at bugs.python.org
Fri Dec 3 18:54:28 CET 2010
Alexander Belopolsky <belopolsky at users.sourceforge.net> added the comment:
On Thu, Dec 2, 2010 at 9:53 PM, Alexander Belopolsky
<report at bugs.python.org> wrote:
..
> .. The honest reason for the exclusion is that I gave up chasing a bug that only shows
> in full regrtest runs.
I have realized where the problem was. PyUnicode_FromUnicode()
"helpfully" interns single-character Unicode objects in the Latin-1
range. So when TransformDecimal replaces whitespace with ' ', it may
garble cached strings. I think this optimization is a left-over from
the time when unicode did not have interning, but it is never a good
idea to change immutable objects in-place after creation, so I'll fix
this problem in my code.
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<http://bugs.python.org/issue10557>
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