var newContext = { id : 'new-context' }; function call(o) { o.x = 3; } noInline(call); // Should be invoced by call with substitute this by newContext function sink (p, q) { var f = () => { // Check if arrow function store context if (this != newContext || this.id != newContext.id) throw 'Wrong context of arrow function #1'; }; if (p) { call(f); // Force allocation of f if (q) { OSRExit(); } return f; } return { 'x': 2 }; } noInline(sink); for (var i = 0; i < 100000; ++i) { var o = sink.call(newContext, true, false); if (o.x != 3) throw "Error: expected o.x to be 2 but is " + result; } // At this point, the arrow function should be compiled down to the FTL // Check that the function is properly allocated on OSR exit var f = sink(true, true); if (f.x != 3) throw "Error: expected o.x to be 3 but is " + result;