[Issue 12789] Add -transition=nan to emit floating-point variables default-initialized to NaN

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12789

--- Comment #5 from bearophile_hugs at eml.cc ---
(In reply to Andrej Mitrovic from comment #4)

> I think we added `-transition` specifically to allow fine-grained control of
> these diagnostics.

Right, sorry, I forgot.

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