1/10 is a periodic numbers in binary (like 1/3 is in decimal). It can't be represented exactly as a float. Normally, the least significant bits are rounded off to give the appearance of being able to store those numbers. You're not getting that rounding for some reason.

I find it odd that a 64-bit build uses double-precision numbers, but I don't know if that's unusual or wrong. I'm not experienced with those.

If you don't get a solution here, I suggest that you file a bug report. It'll put you in touch with people better equipped to solve this problem.

In reply to Re: 64-bit build fails numeric tests by ikegami
in thread 64-bit build fails numeric tests by eshafto

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