test/mjsunit/regress/regress-392114.js

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//
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// Flags: --expose-debug-as debug --allow-natives-syntax

Debug = debug.Debug;

function dummy(x) {
  return x + 100;
}

function create_closure() {
  var f = function(arg) {
    if (arg) { %DeoptimizeFunction(f); }
    var a = Array(10);
    for (var i = 0; i < a.length; i++) {
      a[i] = i;
    }
  }
  return f;
}

var c = create_closure();
c();

// c CallIC state now has custom Array handler installed.

// Turn on the debugger.
Debug.setListener(function () {});

var d = create_closure();
%OptimizeFunctionOnNextCall(d);
// Thanks to the debugger, we recreate the full code too. We deopt and run
// it, stomping on the unexpected AllocationSite in the type vector slot.
d(true);

// CallIC in c misinterprets type vector slot contents as an AllocationSite,
// corrupting the heap.
c();

// CallIC MISS - crash due to corruption.
dummy();