I get this error when trying to compile a program using
[dhtslib](https://github.com/blachlylab/dhtslib) with DMD or any
LDC version < 1.25.0.
```
_D39TypeInfo_S7dhtslib3sam6record9SAMRecord6__initZ: error:
undefined reference to
`_D7dhtslib3sam6record9SAMRecord15__fieldPostblitMFNbNiNlNeZv'
```
Though I only experience this when trying to create an array of
`SAMRecord`s.
One solution I have found is using `std.array.Appender` instead
of arrays. Another solution I have found is to define an explicit
postblit for `SAMRecord`, though the implicitly generated
postblit should work.
Looking through ldc changelogs, the closest thing I could
attribute this to is this change for ldc-1.25.0:
- Struct TypeInfos are emitted into referencing object files
only, and special TypeInfo member functions into the owning
object file only. (#3491)
I posted this question
[previously](https://forum.dlang.org/post/flpztfooingrpkxan...@forum.dlang.org), though I explained the problem poorly.
I don't understand why my fixes work or what is causing the issue
in the first place. Is there something I should be doing
differently? Is this a compiler or language bug?
