mkgist-created gist

text.txt

function makeExtensibleString() {
    var s = "x";
    var t = "yyyyyyyyyyyyyyyyyyytyyyyyy";
    var r1 = t + s;
    ensureFlatString(r1);
    return r1;
}

function test() {
    const s0 = makeExtensibleString();
    const r0 = s0 + (s0 + "!");
    ensureFlatString(r0);
    const s = makeExtensibleString();
    const right = (s + "!");
    const r = s + right;
    // print(r);
    dumpStringRepresentation(r);
    print("  ------------");
    Math.sin(0, r);
    ensureFlatString(r);
    dumpStringRepresentation(right); // right should now be a dependent string with .base = r
    print("  ----- minor GC -------");
    minorgc();
    // Expect r0 to be marked first, added to deDupSet. Then r gets deduplicated to r0.
    // Now right is a dependent string pointing to r's old data, which gets freed.
    print(right);
    print("  --- r -----");
    dumpStringRepresentation(r);
    print("  --- right, after minorgc -----");
    dumpStringRepresentation(right);
}

test();