JDK-8006304.js

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/**
 * JDK-8006304 : Remove pre-population of maps for constructor produced maps.
 *
 * @test
 * @run
 */

function Factory() {
    this.w = 10;
    this.x = 20;
    if (false) {
        this.y = 30;
    }
    this.z = 40;
}

var a = new Factory();
for (var i in a) print(i, a[i]);