[Issue 17956] core.memory unittest failure (possibly glibc 2.26 specific)

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=17956

--- Comment #3 from Seb <greensunny12 at gmail.com> ---
> However this test should be fixed, pureMalloc(long.max-2) maybe?

Let's see what the auto-tester says:

https://github.com/dlang/druntime/pull/1991

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