michael@0: // GC in nested for-loops is safe.
michael@0: 
michael@0: var x;
michael@0: for (x of Set([1]))
michael@0:     for (x of Set([1]))
michael@0:         for (x of Set([1]))
michael@0:             for (x of Set([1]))
michael@0:                 for (x of Set([1]))
michael@0:                     for (x of Set([1]))
michael@0:                         for (x of Set([1]))
michael@0:                             for (x of Set([1]))
michael@0:                                 for (x of Set([1]))
michael@0:                                     for (x of Set([1]))
michael@0:                                         for (x of Set([1]))
michael@0:                                             for (x of Set([1]))
michael@0:                                                 for (x of Set([1]))
michael@0:                                                     for (x of Set([1]))
michael@0:                                                         for (x of Set([1]))
michael@0:                                                             for (x of Set([1]))
michael@0:                                                                 gc();