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On 19 December 2014 at 13:51, <> wrote:
The manual says that "ptr is NULL if and only if osize is zero." Besides, my implementation closely follows the sample implementation in the user manual:

I tried to write an allocator that respects all the rules in the user manual, one by one:

Are you using 5.1?
Could you show me some sample output?

Try reading from the 5.2 manual, it is much clearer:
The osize as indication of type of new in 5.2; you need to check `ptr` before looking at `osize`.