Comment 6 for bug 331095
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| Matthew Fuller (fullermd) wrote Re: [Bug 331095] Re: patiencediff tries to malloc 0 bytes; tests fail on AIX | #6 |
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73416ba
(Get the code!)
> Actually it seems it is portable that free(NULL) is a no-op, so #1
> is the way to go.
It's common, but not necessary; free(NULL) falls into undefined
behavior, and it's possible that some cases may cause nasal demons.
Older versions of dmalloc errored by default on it, for instance.
That said, I don't offhand know of any current or not-so-current
system malloc implementation that chokes on it.