https://issues.dlang.org/show_bug.cgi?id=21578

--- Comment #1 from ZombineDev <petar.p.kirov@gmail.com> ---
Test case:

import core.atomic;
shared(ulong)[] array = [2, 4, 6, 8, 10, 12, 14, 16, 19, 20];
{
    shared ulong* ptr = &array[0];
    shared(ulong)* prevPtr = atomicFetchAdd(ptr, 3);
    assert(prevPtr == &array[0]); // OK
    assert(*prevPtr == 2); // OK
    assert(*ptr == 8); // OK
}
{
    shared ulong* ptr = &array[5];
    shared(ulong)* prevPtr = atomicFetchSub(ptr, 4);
    assert(prevPtr == &array[5]); // OK
    assert(*prevPtr == 12); // OK
    assert(*ptr == 4); //fails
}

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https://issues.dlang.org/show_bug.cgi?id=21578

Dlang Bot <dlang-bot@dlang.rocks> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |pull

--- Comment #2 from Dlang Bot <dlang-bot@dlang.rocks> ---
@rymrg created dlang/druntime pull request #3343 "Fix issue 21578 - core.atomic.atomicFetchSub for pointers incorrectly…" fixing this issue:

- Fix issue 21578 - core.atomic.atomicFetchSub for pointers incorrectly calls wrong function from core.internal.atomic

https://github.com/dlang/druntime/pull/3343

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https://issues.dlang.org/show_bug.cgi?id=21578

Dlang Bot <dlang-bot@dlang.rocks> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #3 from Dlang Bot <dlang-bot@dlang.rocks> ---
dlang/druntime pull request #3343 "Fix issue 21578 - core.atomic.atomicFetchSub for pointers incorrectly…" was merged into stable:

- fbf5f525756e51879578c2663643449a5c9c4040 by rymrg:
  Fix issue 21578 - core.atomic.atomicFetchSub for pointers incorrectly calls
wrong function from core.internal.atomic

https://github.com/dlang/druntime/pull/3343

--

https://issues.dlang.org/show_bug.cgi?id=21578

--- Comment #4 from Dlang Bot <dlang-bot@dlang.rocks> ---
dlang/druntime pull request #3374 "merge stable" was merged into master:

- 2d1f8efbe72c2a9712e055e617285a0f5661f9f3 by rymrg:
  Fix issue 21578 - core.atomic.atomicFetchSub for pointers incorrectly calls
wrong function from core.internal.atomic

https://github.com/dlang/druntime/pull/3374

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