Coverage of async methods

[danielpalme]

I found a case where coverage of an async method is wrong.
I created a minimal repro using coverlet.collector 1.3.0.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace SomeAssembly
{
    public class ClassUnderTest
    {
        public async Task Execute()
        {
            await this.ExcecuteInner();
        }

        private async Task ExcecuteInner()
        {
            Console.WriteLine("This line should get executed");
            var someClasses = new List<SomeClass>();

            if (someClasses.Count > 0 && !someClasses[0].SomeText.Any(x => x == 'x'))
            {
                Console.WriteLine("Hello");
            }
        }

        private class SomeClass
        {
            public string SomeText { get; set; }
        }
    }
}

The method ExcecuteInner() gets executed, but only the if statements shows up in coverage results, the other lines are missing:

If I simplify the if statement or make the method synchronous, the problem disappears.

The cobertura file does only contain information about the line with the if statement:

        <class name="SomeAssembly.ClassUnderTest/&lt;Execute&gt;d__0" filename="temp\SomeAssembly\ClassUnderTest.cs" line-rate="1" branch-rate="1" complexity="1">
          <methods>
            <method name="MoveNext" signature="()" line-rate="1" branch-rate="1" complexity="1">
              <lines>
                <line number="11" hits="1" branch="False" />
                <line number="12" hits="1" branch="False" />
                <line number="13" hits="1" branch="False" />
              </lines>
            </method>
          </methods>
          <lines>
            <line number="11" hits="1" branch="False" />
            <line number="12" hits="1" branch="False" />
            <line number="13" hits="1" branch="False" />
          </lines>
        </class>
        <class name="SomeAssembly.ClassUnderTest/&lt;&gt;c" filename="temp\SomeAssembly\ClassUnderTest.cs" line-rate="0" branch-rate="0.5" complexity="4">
          <methods>
            <method name="&lt;ExcecuteInner&gt;b__1_0" signature="(System.Char)" line-rate="0" branch-rate="0.5" complexity="4">
              <lines>
                <line number="20" hits="0" branch="True" condition-coverage="50% (2/4)">
                  <conditions>
                    <condition number="42" type="jump" coverage="50%" />
                    <condition number="105" type="jump" coverage="50%" />
                  </conditions>
                </line>
              </lines>
            </method>
          </methods>
          <lines>
            <line number="20" hits="0" branch="True" condition-coverage="50% (2/4)">
              <conditions>
                <condition number="42" type="jump" coverage="50%" />
                <condition number="105" type="jump" coverage="50%" />
              </conditions>
            </line>
          </lines>
        </class>

Here's a full project to reproduce the issue:
SampleProject.zip

[petli]

This looks very similar to #760 which has been fixed by #896, but not released yet.