bc21ed151e
`var` declarations can have duplicates, but duplicate `let` or `const` bindings are a syntax error. Because of this, we can sink `let` and `const` directly into the preferred_dst if available. This is not safe for `var` since the preferred_dst may be used in the initializer. This patch fixes the issue by simply skipping the preferred_dst optimization for `var` declarations.
50 lines
982 B
JavaScript
50 lines
982 B
JavaScript
test("basic functionality", () => {
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function foo() {
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i = 3;
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expect(i).toBe(3);
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var i;
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}
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foo();
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var caught_exception;
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try {
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j = i;
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} catch (e) {
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caught_exception = e;
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}
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expect(caught_exception).not.toBeUndefined();
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});
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test("Issue #8198 arrow function escapes function scope", () => {
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const b = 3;
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function f() {
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expect(b).toBe(3);
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(() => {
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expect(b).toBe(3);
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var a = "wat";
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eval("var b=a;");
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expect(b).toBe("wat");
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})();
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expect(b).toBe(3);
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}
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f();
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expect(b).toBe(3);
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});
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test("Referencing the declared var in the initializer of a duplicate var declaration", () => {
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function c(e) {
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e.foo;
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}
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function h() {}
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function go() {
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var p = true;
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var p = h() || c(p);
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return 0;
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}
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// It's all good as long as go() doesn't throw.
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expect(go()).toBe(0);
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});
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