so, the bytecode for `Map1.entrySet()` (used in Ab...

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[jkwatson]

so, the bytecode for Map1.entrySet() (used in AbstractMap’s toString) is doing an invokevirtual on Map1.getEntries(), which, since it’s invokevirtual calls Map2.getEntries(), which does an invokespecial on Map1.entrySet(), and ‘round and ‘round we go.