_From @alexandrudima on January 27, 2016 13:53_ Testing #2218 The duplicate here is not a problem because the code is not in strict mode (also tried running it and node runs it just fine): ``` javascript // "use strict"; var o = { p: 1, p: 2}; console.log(o); ```  ## But in ES6 this is not an error anymore? I have also found the following interesting note at https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode:  _Copied from original issue: Microsoft/vscode#2452_