[Issue 19271] C++ exception handling does not work on OSX

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19271

--- Comment #1 from Mathias LANG <pro.mathias.lang at gmail.com> ---
I have a WIP here: https://github.com/dlang/druntime/pull/2303

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