[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 #4 from Stanislav Blinov <stanislav.blinov at gmail.com> ---
But functions in that fix do not assert that. Nor is 0 an invalid argument to
malloc.

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