A combination of Cast and Slice leads to AccessViolationException

Describe the bug

The following code throws System.AccessViolationException:

            int height = 720;
            int width = 1280;
            byte[] storage = new byte[width * height * sizeof(int)];
            Memory2D<int> data = storage
                .AsMemory()
                .Cast<byte, int>()
                .AsMemory2D(height: height, width: width);
            Memory2D<int> slice = data.Slice(
                row: height / 2,
                column: 0,
                height: height / 2,
                width: width);
            int total = 0;
            foreach (int v in slice.Span)
            {
                total += v;
            }

Regression

No response

Steps to reproduce

Create a project targeting net7.0, paste the above code into the `Main` method, run it.

Expected behavior

The code is supposed to calculate a sum of all values in the slice (in this case, 0).

Screenshots

IDE and version

VS 2022

IDE version

17.4.4

Nuget packages

CommunityToolkit.Common
CommunityToolkit.Diagnostics
CommunityToolkit.HighPerformance
CommunityToolkit.Mvvm (aka MVVM Toolkit)

Nuget package version(s)

8.2.0

Additional context

The problem disappears when there's no Cast() (so, we are summing over a Span of bytes). It also disappears when there's no Slice() (so, we are summing over data instead of slice).

Help us help you

No, just wanted to report this

Good catch!! Thank you 😄

@Sergio0694

@Sergio0694 when will this be released?

@Sergio0694

@Sergio0694 do you have some ETA of when this will be released? I can see you added it to 8.2.1, but I could not find a planned/estimated release date for that?

It's just so I can decide if I should implement a workaround for this, or if I can wait for 8.2.1.

I don't have an exact ETA just yet, but tentatively I'd say probably around the first half of June or so?
Can you use a nightly package from main in the meantime? The feed is this one:
https://pkgs.dev.azure.com/dotnet/CommunityToolkit/_packaging/CommunityToolkit-MainLatest/nuget/v3/index.json

I guess, I could use one of the nightly builds for now.

I will use 8.2.1-build.2

Thanks

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A combination of Cast and Slice leads to AccessViolationException #674

Describe the bug

Regression

Steps to reproduce

Expected behavior

Screenshots

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Nuget packages

Nuget package version(s)

Additional context

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A combination of Cast and Slice leads to AccessViolationException #674

Description

Describe the bug

Regression

Steps to reproduce

Expected behavior

Screenshots

IDE and version

IDE version

Nuget packages

Nuget package version(s)

Additional context

Help us help you

Activity

Sergio0694 commented on Apr 27, 2023

ChristophLindemann commented on Apr 28, 2023

ChristophLindemann commented on May 10, 2023

Sergio0694 commented on May 10, 2023

ChristophLindemann commented on May 10, 2023

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