var newContext = { id : 'new-context' }; // Should be invoced by call with substitute this by newContext function sink (p, q) { var g = x => { // Check if arrow function store context if (this != newContext || this.id != newContext.id) throw 'Wrong context of arrow function #1'; return x; }; if (p) { if (q) g.inner = 42; return g; } return x => { // Check if arrow function store context if (this != newContext || this.id != newContext.id) throw 'Wrong context of arrow function #2'; return x; }; } noInline(sink); for (var i = 0; i < 10000; ++i) { var f = sink.call(newContext, true, true);// use call to substitute context var result = f(42); if (result != 42) throw "Error: expected 42 but got " + result; } // At this point, the arrow function should be compiled down to the FTL // Test the allocation on the implicit inner else branch var f = sink.call(newContext, true, false); var result = f(12); if (result != 12) // This shouldn't matter as it should be either correct or completely crash throw "Error: expected 12 but got " + result; // Check that the allocation did not sink beyond the property assignment var f = sink.call(newContext, true, true); var result = f.inner; if (result != 42) throw "Error: inner should be 42 but is " + result;