[Issue 23903] Demangling produces exponentially long output

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23903

--- Comment #1 from Vladimir Panteleev <dlang-bugzilla at thecybershadow.net> ---
This also applies to C++, where it seems to be a known problem.

Google's Abseil limits demangling recursion with a "ComplexityGuard":
https://chromium.googlesource.com/external/github.com/abseil/abseil-cpp/+/HEAD/absl/debugging/internal/demangle.cc#187

Some discussion in a blog post about implementing a C++ demangler in Rust:
https://fitzgeraldnick.com/2017/02/22/cpp-demangle.html#what-makes-demangling-c-symbols-difficult

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