ychen added a comment.

In D134542#3814029 <https://reviews.llvm.org/D134542#3814029>, @erichkeane 
wrote:

> Thanks for the quick review!  Yeah, that case is a tough one, we don't really 
> have a good way of determining whether that was supposed to fail, or be the 
> best match.  GCC does the option of just treating it as failed, so it'll have 
> the problem that I mentioned above.  No idea what MSVC is doing though.... 
> thats frightening.

This paper 
(https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2429r0.pdf) makes me 
like the current approach more. Basically, we better strive for intuitive 
diagnostics instead of diagnosing as many errors as possible but run the risk 
of lower-quality diagnostic messages.


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