ExcludeFromCodeCoverage ignored for method in generic class that returns an IAsyncEnumerable

[daveMueller]

    Seeing similar behavior where a Generic Class has a method that returns an `IAsyncEnumerable`, the method is marked with `ExcludeFromCodeCoverage` however coverage is reported as zero instead of being ignored.

Originally posted by @RobARichardson in #1383 (comment)

[daveMueller]

@RobARichardson sorry I can't reproduce it. As a repro I have https://github.com/daveMueller/CoverletIssue1431 with coverlet 3.2.0:

public class Class1<T>
{
    public static async IAsyncEnumerable<int> Demo()
    {
        yield return 5;
    }
}

Without the [ExcludeFromCodeCoverage] attribute I get a coverage report with following content:

    <package name="CoverletIssue1431" line-rate="1" branch-rate="0.5" complexity="4">
      <classes>
        <class name="CoverletIssue1431.Class1`1/&lt;Demo&gt;d__0" filename="Repos\CoverletIssue1431\CoverletIssue1431\Class1.cs" line-rate="1" branch-rate="0.5" complexity="4">
          <methods>
            <method name="MoveNext" signature="()" line-rate="1" branch-rate="0.5" complexity="4">
              <lines>
                <line number="9" hits="1" branch="True" condition-coverage="50% (1/2)">
                  <conditions>
                    <condition number="31" type="jump" coverage="50%" />
                  </conditions>
                </line>
                <line number="10" hits="1" branch="True" condition-coverage="50% (1/2)">
                  <conditions>
                    <condition number="79" type="jump" coverage="50%" />
                  </conditions>
                </line>
                <line number="11" hits="1" branch="False" />
              </lines>
            </method>
          </methods>
          <lines>
            <line number="9" hits="1" branch="True" condition-coverage="50% (1/2)">
              <conditions>
                <condition number="31" type="jump" coverage="50%" />
              </conditions>
            </line>
            <line number="10" hits="1" branch="True" condition-coverage="50% (1/2)">
              <conditions>
                <condition number="79" type="jump" coverage="50%" />
              </conditions>
            </line>
            <line number="11" hits="1" branch="False" />
          </lines>
        </class>
      </classes>
    </package>

After adding the attribute:

public class Class1<T>
{
    [ExcludeFromCodeCoverage]
    public static async IAsyncEnumerable<int> Demo()
    {
        yield return 5;
    }
}

I get an empty coverage report which is the expected result.

<?xml version="1.0" encoding="utf-8"?>
<coverage line-rate="1" branch-rate="1" version="1.9" timestamp="1673254959" lines-covered="0" lines-valid="0" branches-covered="0" branches-valid="0">
  <sources />
  <packages>
    <package name="CoverletIssue1431" line-rate="1" branch-rate="1" complexity="0">
      <classes />
    </package>
  </packages>
</coverage>

@RobARichardson could you provide a repro for us to further investigate the issue?

[github-actions]

This issue is stale because it has been open for 3 months with no activity.