figure out where a particular template function is located

Wed Jun 24 20:38:22 UTC 2020

On Wednesday, 24 June 2020 at 20:28:24 UTC, Steven Schveighoffer 
wrote:
> Is there a way to figure this out from the call?

The .mangleof the instance might help track it down since it 
should give you the module name as part of that mangle. Then go 
in there and start breaking things (or use the __FILE__, __LINE__ 
default args) to narrow it down.

not a great answer but sould at least get you started.