ebiten: test fails with Go 1.22 on 32bit Windows

[hajimehoshi]

Ebitengine Version

fa483ad

Operating System

• Windows
• macOS
• Linux
• FreeBSD
• OpenBSD
• Android
• iOS
• Nintendo Switch
• PlayStation 5
• Xbox
• Web Browsers

Go Version (go version)

1.22-rc.1

What steps will reproduce the problem?

Run go test .

What is the expected result?

The tests pass.

What happens instead?

The test fails.

-test.shuffle 1703091731083356900
=== RUN   TestImageNewImageFromEbitenImage
    image_test.go:3172: img1.At(0, 0): got: {0 0 0 0}, want: {4 4 0 255}
    image_test.go:3172: img1.At(1, 0): got: {0 0 0 0}, want: {5 4 0 255}
    image_test.go:3172: img1.At(2, 0): got: {0 0 0 0}, want: {6 4 0 255}
    image_test.go:3172: img1.At(3, 0): got: {0 0 0 0}, want: {7 4 0 255}
    image_test.go:3172: img1.At(4, 0): got: {0 0 0 0}, want: {8 4 0 255}
    image_test.go:3172: img1.At(5, 0): got: {0 0 0 0}, want: {9 4 0 255}
    image_test.go:3172: img1.At(6, 0): got: {0 0 0 0}, want: {10 4 0 255}
    image_test.go:3172: img1.At(7, 0): got: {0 0 0 0}, want: {11 4 0 255}
    image_test.go:3172: img1.At(0, 1): got: {0 0 0 0}, want: {4 5 0 255}
    image_test.go:3172: img1.At(1, 1): got: {0 0 0 0}, want: {5 5 0 255}
    image_test.go:3172: img1.At(2, 1): got: {0 0 0 0}, want: {6 5 0 255}
    image_test.go:3172: img1.At(3, 1): got: {0 0 0 0}, want: {7 5 0 255}
...

https://github.com/hajimehoshi/ebiten/actions/runs/7278421007/job/19832581602

Anything else you feel useful to add?

As this is an RC version, there might be an issue in Go. Let's investigate this anyway...

[hajimehoshi]

https://github.com/golang/go/issues?q=is%3Aissue+is%3Aopen+milestone%3AGo1.22+Windows+386 👀

[hajimehoshi]

The test passed on my local (Parallels) machine

> $env:GOARCH = "386"
> go1.22rc1 test . -short
ok      github.com/hajimehoshi/ebiten/v2        11.585s

[hajimehoshi]

This seems to happen with DirectX 12. I could reproduce this on my local machine.

$env:GOARCH="386"
$env:EBITENGINE_DIRECTX="version=12"
go1.22rc2.exe test . -run=^TestImageNewImageFromEbitenImage$ -count=1

[hajimehoshi]

One liner not to pollute global environments:

& (Get-Process -Id $PID).Path { $env:GOARCH="386"; $env:EBITENGINE_DIRECTX="version=12"; go1.22rc2.exe test . -run=^TestImageNewImageFromEbitenImage$ -count=1 }

I could reproduce this on Intel Windows, but not on Arm Windows.

[hajimehoshi]

I'll create a debug mode to trace all the DirectX (12) calls

[hajimehoshi]

Note to myself: execute a binary to draw an image in the same way as TestImageNewImageFromEbitenImage but without reading pixels.

Also, let's try another version of Ebitengine like v2.6.