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Incorrect control flow analysis for typeof x == undefined  #14937

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Incorrect control flow analysis for typeof x == undefined #14937
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ExternalRelates to another program, environment, or user action which we cannot control.

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@cevek
cevek
opened on Mar 30, 2017

Example from real bug

var x: number | undefined;
if (typeof x !== undefined) {
    var y = x + 1; // no error, but should be
}

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  1. cevek commented on Mar 30, 2017

    @cevek
    cevek
    on Mar 30, 2017
    Author

    Actually not a bug, just something happens with vscode

  2. cevek
    closed this as completedon Mar 30, 2017
  3. Ryan Cavanaugh (RyanCavanaugh)
    added
    ExternalRelates to another program, environment, or user action which we cannot control.
    on Mar 30, 2017

  4. cevek commented on Jun 27, 2017

    @cevek
    cevek
    on Jun 27, 2017
    Author

    Same things have happened in the complier #16663

  5. microsoft
    locked and limited conversation to collaborators on Jun 21, 2018
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