[Issue 17226] Exception during the generation of an assert message hides AssertError

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=17226

--- Comment #9 from Ali Cehreli <acehreli at yahoo.com> ---
I think the "invalid state" ship has sailed here because a D program by default
dumps backtrace to stderr. Can that always work? No, but I think we accept it
as best-effort.

I think the same applies to the assert message: A best-effort to show something
meaningful. May work but it should not hide the actual issue.

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