On Wednesday, 7 February 2024 at 11:49:20 UTC, Richard (Rikki)
Andrew Cattermole wrote:
```
undefined reference to
`_D4core9exception__T15__switch_errorTZQsFNaNbNiNeAyamZv'
collect2: error: ld returned 1 exit status
Error: linker exited with status 1
```
Use ``-allinst``, that is a template emission bug.
!
Thanks, at least I can continue now, though presumably the cure
has its own problems.
```
$ dmd --help | grep allinst
-allinst generate code for all template instantiations
```
Unclear exactly how -allinst does this, given type parameters,
and it will affect all of the many templates I use in source with
CodepointSet.
Can you shed any light?
