[PATCH] RFC: fail-fast iterators for DenseMap

[Daniel Berlin]

On Tue, Mar 3, 2015 at 12:53 PM, Sanjoy Das <sanjoy at playingwithpointers.com>
wrote:

> I'm about to revert this because it broke clang.
>
> The reason it broke clang is that clang assumes a default constructed
> DenseMapIterator is comparable with another default constructed
> DenseMapIterator.



Where does this happen?
I'd really like to see an actual example of how this makes sense to do

i have no idea whether it's generally considered "normal" to do this, but
i'm actually really curious to see a case where it is the right thing to do
:)
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