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#ifdef RANDOMIZE_ALLOCATED_MEMORY
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* For pass-by-reference data types, repeat the conversion to see if the
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* input function leaves any uninitialized bytes in the result. We can
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* instability in the input function is that comparison of Const nodes
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* relies on bytewise comparison of the datums, so if the input function
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* leaves garbage then subexpressions that should be identical may not get
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if (string && !typform->typbyval)