[Issue 19643] core.demangle doesn't handle extern(Objective-C) correctly

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19643

--- Comment #3 from Dlang Bot <dlang-bot at dlang.rocks> ---
@kubo39 updated dlang/druntime pull request #2977 "Fix Issue 20640 - LDC:
AddressSanitizer failing to catch SIGSEGV in unittest" fixing this issue:

- FIX Issue 19643 - add missing Objective-C function calling convention

https://github.com/dlang/druntime/pull/2977

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