Re: BUG #5592: list of integer undefined behaviors

On Mon, Aug 2, 2010 at 7:16 PM, John Regehr <regehr@cs.utah.edu> wrote:
> <nabstime.c, (1193:21)> : Op: -, Reason : Signed Subtraction Overflow,
> BINARY OPERATION: left (int32): 2147483644 right (int32): -2147483648
>
> <nabstime.c, (1194:21)> : Op: -, Reason : Signed Subtraction Overflow,
> BINARY OPERATION: left (int32): 2147483644 right (int32): -2147483648
>

These seem to imply that tinterval can contain a start point greater
than its end point. I'm not familiar with the rep invariant of
tinterval well enough to know if that's true or an indication of a bug
elsewhere. I suppose it doesn't matter for cmp since it's still
assigning an arbitrary position in the range to the interval.

--
greg