Prototype pollution defense: One test patches Object.prototype.then to intercept promise resolutions, then verifies that pipeTo() and tee() operations don't leak internal values through the prototype chain. This tests a security property that only exists because the spec's promise-heavy internals create an attack surface.
posToTime.set(pos, time);
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FirstFT: the day's biggest stories
A new drug for advanced prostate cancer has shown promise in early trials experts have said, with the medication shrinking tumours in some patients.