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Per step 13 of ScriptEvaluation in the ECMA-262 spec, the script body should only be evaluated if GlobalDeclarationInstantiation returned a normal completion. This can't currently be triggered since we always create fresh Script objects, but if we ever start reusing cached executables across evaluations, this would prevent a subtle bug where the script body runs despite GDI failing.
8 lines
348 B
JavaScript
8 lines
348 B
JavaScript
test("script body is not evaluated when GlobalDeclarationInstantiation fails", () => {
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evaluateSource("let x = 1;");
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expect(() => {
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evaluateSource("let x = 2; globalThis.__side_effect = true;");
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}).toThrowWithMessage(SyntaxError, "Redeclaration of top level variable");
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expect(globalThis.__side_effect).toBeUndefined();
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});
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