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// The value of a `var` on entering a function is `undefined`, even if a
// default expression uses the same stack slot for something else.
load(libdir + "asserts.js");
function f(a = class C{}) {
var x;
return x;
}
assertEq(f(), undefined);
function* g1(a = class C {}) {
var x;
assertEq(x, undefined);
}
g1().next();
function* g2(a = class C {}) {
x;
let x;
}
assertThrowsInstanceOf(() => g2().next(), ReferenceError);
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