Broken build in version 7.0.200

[rholek]

This code doesn't build with SDK 7.0.200

public class C
{
    public async Task M()
    {

        bool shoudRunAgain;

        async Task DoSomething()
        {
            Console.WriteLine("Test");
            shoudRunAgain = false;
        }

        await DoSomething();
        if (shoudRunAgain)
            await DoSomething();
    }
}

It fails with error
error CS0165: Use of unassigned local variable 'shoudRunAgain'

However with version 7.0.102 it builds without error

[baronfel]

This looks like new/fixed analyzers were included in 7.0.200, which is not a breaking change per se.

[baronfel]

@jaredpar should this go to Roslyn?

[jaredpar]

Correct. This is a duplicate of dotnet/roslyn#43697. This was a bug we decided to fix in 7.0 SDK.

[rholek]

I must say that I don't see a way this could run without shoudRunAgain being assigned since DoSomething is awaited. But I guess the analysis would be too complicated with that, so I understand.

However, this should be listed as a breaking change.