michael@0: // first build a big honkin' string
michael@0: str = "a";
michael@0: for (var i = 0; i < 20; ++i)
michael@0:     str = str + str;
michael@0: str.indexOf('a');
michael@0: 
michael@0: var f;
michael@0: f = makeFinalizeObserver();
michael@0: assertEq(finalizeCount(), 0);
michael@0: 
michael@0: // Create another observer to make sure that we overwrite all conservative
michael@0: // roots for the previous one and can observer the GC.
michael@0: f = makeFinalizeObserver();
michael@0: 
michael@0: // if the assert fails, add more iterations
michael@0: for (var i = 0; i < 80; ++i)
michael@0:     str.replace(/(a)/, '$1');
michael@0: //assertEq(finalizeCount(), 1);