BigInt.divided(by:) sign of remainder

[Poul Williams]

I'm wondering if there is a bug in the BigInt.divided(by:) function. I'm using it to find the remainder of -180 / 360. I would have expected the remainder to be -180, but instead I get 180:

(lldb) p BigInt(-180).divided(by: 360).quotient.description
(String) $R15 = "0"
(lldb) p BigInt(-180).divided(by: 360).remainder.description
(String) $R16 = "180"

I'm actually trying to use the % function (which maps to divided(by:) behind the scenes):

(lldb) p (BigInt(-180) % BigInt(360)).description
(String) $R21 = "180"

For Swift integers, % works as I would expect:

(lldb) p -180 % 360
(Int) $R22 = -180

Anyway, thanks for a great Swift package!

[Matthias Zenger]

Thanks for reporting this issue. This was indeed a pretty serious bug! The issue is now fixed.