zlacker

have found bugs in native JVM, usually it takes some effort, though. Printing the assembly is the easiest one. (I consider the bug in java.lang/util/io/etc. code not an interesting case)

Memory leaks and issues with the memory allocator are months long process to pin on the JVM...

In the early days (bug parade times), the bugs are a lot more common, nowadays -- I'd say it'd be an extreme naivete to consider JVM the culprit from the get-go.