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CS8652 on the RC with C# 8.0 #33756

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ufcpp opened this issue Feb 28, 2019 · 3 comments
Closed

CS8652 on the RC with C# 8.0 #33756

ufcpp opened this issue Feb 28, 2019 · 3 comments

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@ufcpp
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ufcpp commented Feb 28, 2019

Version Used:

Visual Studio 2019 RC (Version 16.0.0 RC)
LangVersion: 8.0
dotnet version: 3.0.100-preview-010184

Steps to Reproduce:

use recursive patterns.

struct Point
{
    public int X, Y;
    public Point(int x, int y) => (X, Y) = (x, y);
}

class Program
{
    static bool M(Point p) => p is { X: 0 };
}

Expected Behavior:

No error.

Actual Behavior:

image

FYI, There is no error if I use VS 16.0.0 Preview 4.0.
I get the same error if I change LangVersion to preview.

In addition, I have also the following error on this code in the RC.

Error NETSDK1045 The current .NET SDK does not support targeting .NET Core 3.0. Either target .NET Core 2.2 or lower, or use a version of the .NET SDK that supports .NET Core 3.0. ConsoleAppNetCore30 C:\Program Files\dotnet\sdk\2.2.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.TargetFrameworkInference.targets 137

@WilStead
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Look for this setting (search for "core" to find it easily):

capture

Make sure "Use previews of the .NET Core SDK" is checked. That should resolve both problems.

@ufcpp
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ufcpp commented Mar 1, 2019

@WilStead

Oh I see. My issue was solved with that option. Thanks!

@ufcpp ufcpp closed this as completed Mar 1, 2019
@ufcpp
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ufcpp commented Mar 1, 2019

but, the error message is bit confusing...

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