Faulty compiler error message CS0165

[gafter]

@vsfeedback commented on Mon Feb 25 2019

A compiler error message CS0165 appears even though the code is correct.

private static void MicrosoftFehler()
{
MsFehler msf = new MsFehler();

  //  It works - no message appears
  if (msf != null &&  msf.Fkt(out int n) == true)
  {
    Console.WriteLine(n);
  }

  // Here a message appears, although the code is correct:
  // Error CS0165 Use of unassigned local variable  "m"
  //------------------------------------------------------------------------------
  if (msf?.Fkt(out int m) == true)
  {

---> Console.WriteLine(m); <----------------------------------------------------------------------------
}

}



class MsFehler
{
  public bool Fkt(out int i)
  {
    i = 100;

    return true;
  }
}

This issue has been moved from https://developercommunity.visualstudio.com/content/problem/47334/faulty-compiler-error-message-cs0165.html
VSTS ticketId: 421730
These are the original issue comments:
(no comments)
These are the original issue solutions:
(no solutions)

---

@gafter commented on Tue Feb 26 2019

Although I have sympathy, the current language specification does not have separate "assigned when true" and "assigned when false" states for operator==. Therefore this is a language feature request and I am moving it to csharplang.

[Unknown6656]

@gafter : you can use GitHub's issue transferal tool for that ^^.

[Joe4evr]

I already told him in #2260.

[yaakov-h]

Duplicate of #1195?

[gafter]

you can use GitHub's issue transferal tool for that

No I cannot because I am not an admin for this repository.

[Unknown6656]

Oh my bad, I thought that [Member]s have the same permissions.

[jnm2]

@Unknown6656 Please send feedback to GitHub about this. I haven't been able to use the issue transfer feature yet at NUnit either for the same reason, and it would be really useful there as well.