[Issue 19164] malloc may be considered pure when failure results in program exit (no need to reset errno)

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19164

--- Comment #5 from Nathan S. <n8sh.secondary at hotmail.com> ---
The functions are package-visible only, and they're replacing places where
previously malloc was being called and the program was aborting if the result
was null.

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