C# Math.Pow(-1, 2) doesn’t output correct value on Windows 11 Insider Preview, Canary channel (27881.1000) · Issue #117233 · dotnet/runtime

Description

The following is copied with extra bits from (Feedback Hub) to raise awareness of this issue:

Hello, I’m a contributor to osu! ( A user reported a really weird problem with our game that only happens in the current version of Canary (27881.1000) in ppy/osu#33948. I’ve narrowed it down to ppy/osu#33948 (comment), which is Math.Pow(-1, 2) returning -1 instead of 1 for some odd reason.

Used VSCode for C# installation of .NET 8 (what osu! uses). I’ve also tried the same math function in Python, but the value was correct (1). C++’s std::pow(-1,2) seems to also output -1, so it may be a bigger issue in Windows.

If you need to contact us better, joining the osu! Discord server would be best (

Reproduction Steps

Console.WriteLine(Math.Pow(-1, 2));

or

Expected behavior

It should output 1.

Actual behavior

It outputs -1 on Windows 11 Insider Preview, Canary channel (27881.1000).

Regression?

No response

Known Workarounds

No response

Configuration

• .NET SDK 8.0.411
• Windows 11 Insider Preview, Canary channel (27881.1000)

Other information

No response