dotnet/roslyn

IDE0200 (remove unnecessary lambda expression) can change semantics when capturing writable members

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#73,259 opened on 2024年4月29日

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Area-IDEBugFeature - IDE0200help wanted

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説明

Version Used:

Steps to Reproduce:

public class Test {
  private List<int> _list = [1];

  public bool N() {
    var func = M();
    _list = [2];
    return func(2);
  }

  private Func<int, bool> M() {
    return x => _list.Contains(x); // IDE0200
  }
}

Diagnostic Id: IDE0200

Expected Behavior: The code fix should not be offered. It changes the semantics.

Actual Behavior: After applying the code fix, N returns false instead of true

I saw that this was fixed when capturing locals in #69101

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