Clang trunk build failure in external/librevenge

[Stephan Bergmann]

On 15/05/2019 09:43, Stephan Bergmann wrote:
> I see that now too after updating my Clang trunk; must be a rather 
> recent Clang regression.  Investigating.

reported at 
<http://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20190513/271477.html> 
"Re: r360308 - [c++20] Implement P0846R0: allow (ADL-only) calls to 
template-ids whose"