[Issue 20208] extern (C++) copy constructor bad mangling for dmd

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20208

Paul Backus <snarwin+bugzilla at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |C++
                 CC|                            |snarwin+bugzilla at gmail.com

--- Comment #4 from Paul Backus <snarwin+bugzilla at gmail.com> ---
Someone just ran into this in the community Discord. I was able to reproduce
using both DMD 2.104.0 and LDC 1.33.0 as the D compiler, with the following
example program:

--- test.d
extern(C++)
struct Test
{
        this(const ref Test other) {}
}
--- main.cpp
struct Test
{
        Test() = default;
        Test(const Test &other);
};

int main()
{
        Test a;
        Test b = a;
        return 0;
}
---

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