[Python-Dev] Unary minus bug (original) (raw)

Neil Schemenauer nas at arctrix.com
Mon Jul 10 00🔞36 CEST 2006

On Sun, Jul 09, 2006 at 03:02:06PM -0700, Neal Norwitz wrote:

Do we care about this (after your checkin and with my fix to make 32-63 bit values ints rather than longs):

# 64 bit box >>>minint = str(-sys.maxint - 1) >>>minint '-9223372036854775808' >>>eval(minint) -9223372036854775808 >>>eval('-(%s)' % minint[1:]) -9223372036854775808L

I don't think we care. Python <= 2.4 has the same behavior (i.e. adding parens defeats the constant folding since it's done at the syntax tree level).

Where's your fix regarding 32-63 bit ints? I'm not familiar with that issue but my recent check-in appears to have broke the 64-bit buildbots. If no one can explain what's going on there then I guess I will have to find a login on a 64-bit machine at debug it myself.

Neil

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