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Annex C (informative) Compatibility [diff]

C.1 C++ and ISO C++ 2023 [diff.cpp23]

C.1.8 [mem]: memory management library [diff.cpp23.mem]

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Affected subclause: [c.malloc]
Change: Calling realloc with a non-null pointer and zero size has erroneous behavior.

Rationale: The C standard library does not define this behavior.

Effect on original feature: Valid C++ 2023 code that calls realloc with a non-null pointer and a size of zero is erroneous and may change behavior.