regress-1633355.js

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// |jit-test| skip-if: wasmCompileMode().includes("ion")

load(libdir + "asserts.js");

var g23 = newGlobal({newCompartment: true});

g23.parent = this;

g23.eval(`

    var dbg = new Debugger(parent);

    dbg.onEnterFrame = function(frame) {}

`);

let bin = wasmTextToBinary(`

     (type $wabbit (struct

        (field $x (mut i32))

        (field $left (mut (ref null $wabbit)))

        (field $right (mut (ref null $wabbit)))

))

     (global $g (mut (ref null $wabbit)) (ref.null $wabbit))

     (func (export "init") (param $n i32)

       (global.set $g (call $make (local.get $n)))

     (func $make (param $n i32) (result (ref null $wabbit))

       (local $tmp i32)

       (struct.new $wabbit (local.get $tmp) (ref.null $wabbit) (ref.null $wabbit))

`);

let mod = new WebAssembly.Module(bin);

let ins = new WebAssembly.Instance(mod).exports;

// Debugger can handle non-exposable fields, like (ref T).

ins.init(6)