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// Test the functionDisplayName of SavedFrame instances.
function uno() { return dos(); }
const dos = () => tres.quattro();
let tres = {};
tres.quattro = () => saveStack()
const frame = uno();
assertEq(frame.functionDisplayName, "tres.quattro");
assertEq(frame.parent.functionDisplayName, "dos");
assertEq(frame.parent.parent.functionDisplayName, "uno");
assertEq(frame.parent.parent.parent.functionDisplayName, null);
assertEq(frame.parent.parent.parent.parent, null);