lucaslorentz/minicover

Instrumenting C# 9 init-only property produces invalid assembly

hell-racer opened this issue · 4 comments

hell-racer commented

Hi!

I have a test class with an init-only property (C# 9).
I'm unable to generate code coverage, because the test fails at runtime.
I use net5.0.

Consider the following minimalistic example:

public class MinicoverTests
{
    [Fact]
    public void InitPropertySet()
    {
        TestClass test = new() { Property = "test" };
    }

    public class TestClass
    {
        public string Property { get; init; }
    }
}

When I try to run tests after instrumenting assemblies, I get the following output:

Starting test execution, please wait...
A total of 1 test files matched the specified pattern.
[xUnit.net 00:00:01.19]     MyNameSpace.MinicoverTests.InitPropertySet [FAIL]
  Failed MyNameSpace.MinicoverTests.InitPropertySet [2 ms]
  Error Message:
   System.InvalidProgramException : Common Language Runtime detected an invalid program.
  Stack Trace:
     at MyNameSpace.MinicoverTests.TestClass.set_Property(String value)
     at MyNameSpace.MinicoverTests.InitPropertySet()

Failed!  - Failed:     1, Passed:     0, Skipped:     0, Total:     1, Duration: < 1 ms

If I change accessor method for property Property from init to set, it runs correctly.
The test runs fine without instrumentation too.

Thanks!

ffMathy commented

Which version of Minicover are you using?

hell-racer commented

I'm using 3.4.7 (also tried several previous versions).

hell-racer commented

@ffMathy can you create new release?

ffMathy commented

Yup, sorry about that. This is not my repo initially, so still getting used to the process here.

I created a release now. Should run via Azure Pipelines, and then push a release soon.

  • 👍1