src/third_party/mozjs-45/js/src/jit-test/tests/debug/Script-gc-02.js

// Debugger.Scripts keep their referents alive.

var g = newGlobal();
var dbg = Debugger(g);
var arr = [];
dbg.onDebuggerStatement = function (frame) { arr.push(frame.script); };
g.eval("for (var i = 0; i < 10; i++) Function('debugger;')();");
assertEq(arr.length, 10);

gc();

for (var i = 0; i < arr.length; i++)
    assertEq(arr[i].lineCount, 1);