Justin Lebar c90dac27e9 [clang] Print 32 candidates on the first failure, with -fshow-overloads=best. ...

Previously, -fshow-overloads=best always showed 4 candidates.  The
problem is, when this isn't enough, you're kind of up a creek; the only
option available is to recompile with different flags.  This can be
quite expensive!

With this change, we try to strike a compromise.  The *first* error with
more than 4 candidates will show up to 32 candidates.  All further
errors continue to show only 4 candidates.

The hope is that this way, users will have *some chance* of making
forward progress, without facing unbounded amounts of error spam.

Differential Revision: https://reviews.llvm.org/D95754

2021-02-25 17:45:19 -08:00

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