[David Hopwood]
>> CPython should be fixed anyway. The correct fix is
>> "if (y == -1 && x < 0 && (unsigned long)x == -(unsigned long)x)".
Note that this was already suggested in the bug report.
[Thomas Wouters]
> Why not just "... && x == LONG_MIN"?
In full,
if (y == -1 && x == LONG_MIN)
"should work" too. In practice we try to avoid numeric symbols from
platform header files because so many platforms have screwed these up
over the centuries (search for LONG_BIT or HUGE_VAL ;-)), and because
it's better (when possible) not to tie the code to that `x` was
specifically declared as type "long" (e.g., just more stuff that will
break if Python decides to make its short int of type PY_LONG_LONG
instead). In this specific case, there may also have been a desire to
avoid generating a memory load for a fat constant. However, since
this is integer division, in real life (outside the test suite) we'll
never go beyond the "y == -1" test.
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