[clang] [llvm] [Clang] Fix cleanup attribute by delaying type checks after the type is deduced (PR #164440)

[Erich Keane via llvm-commits]

erichkeane wrote:

> @erichkeane I am requesting guidance for fixing this template deduction issue as you are the template code owner and I don't know the template deduction area.

Thanks to  the LLVM-Dev and ISO C++ meetings this week/next week, it'll be a while before I get a chance to take a look.  I DO have this on my list of things to take a look at when I return however! 

If you could, please summarize the problem you're needing solved (with terse examples if possible!) in a way that doesn't require extensive reading of the history of this PR so far.  That would very much help me get started on this when I get back.

https://github.com/llvm/llvm-project/pull/164440