1Regression test for art::PrepareForRegisterAllocation, which replaces
2
3  ArraySet[array, index, BoundType[NullConstant]]
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5with
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7  ArraySet[array, index, NullConstant]
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9but used to forget to remove the "need for a type check" bit in the
10ArraySet, thus failing "!may_need_runtime_call_for_type_check"
11assertions in code generators.
12