test/mjsunit/regress/regress-1106.js

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// Test for issue 1106, where the optimizing compiler broke when accessing
// a property lying on a prototype of the global object, and that prototype
// object was in dictionary mode.

x = Object.prototype;
x.foo = 3;
x.bar = 4;
delete x.foo;
x.foo = 5;

function f() { return foo; }

for (i=0 ; i < 100000; ++i) {
  assertEquals(5, f());
}

// Test calls on functions defined in the prototype of the global object.
x.gee = function() { return 42; }
function g() { return gee(); }

for (i=0 ; i < 100000; ++i) {
  assertEquals(42, g());
}