[Issue 15809] Putting std.stdio.File.ByLine in a class causes Invalid memory operation upon exit

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15809

--- Comment #2 from ag0ae...@gmail.com ---
It boils down to this:

----
alias T = void*;
struct RefCounted
{
    T* _store;

    this(int dummy)
    {
        import core.memory : GC;
        import core.stdc.stdlib : malloc;
        _store = cast(T*)malloc(T.sizeof);
        GC.addRange(&_store, T.sizeof);
    }

    ~this()
    {
        assert(_store !is null);
        import core.memory : GC;
        GC.removeRange(&_store);
    }
}

void main()
{
    auto a = new RefCounted(0);
}
----

I don't know if there's anything wrong with this usage of
GC.addRange/GC.removeRange. If there is, this is a bug in
std.typecons.RefCounted. If there's not, it's a druntime/dmd issue.

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