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LibJS: Fallback to undefined if last value in eval() is empty
For something like eval(""), the VM's 'last value' is an empty value, which we must not leak. Fixes #6643.
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2 changed files with 2 additions and 1 deletions
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@ -11,6 +11,7 @@ test("basic eval() functionality", () => {
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test("returns value of last value-producing statement", () => {
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// See https://tc39.es/ecma262/#sec-block-runtime-semantics-evaluation
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expect(eval("")).toBeUndefined();
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expect(eval("1;;;;;")).toBe(1);
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expect(eval("1;{}")).toBe(1);
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expect(eval("1;var a;")).toBe(1);
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