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Comment by spiffyk

2 days ago

From `malloc(3)`:

   Nonportable behavior
       The  behavior of these functions when the requested size is zero is glibc specific; other implementations may return NULL without setting errno, and portable POSIX programs should tolerate such behavior.  See realloc(3p).

       POSIX requires memory allocators to set errno upon failure.  However, the C standard does not require this, and applications portable to non-POSIX platforms should not assume this.

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spiffyk

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