Packers are not found for functions that are imported rather than declared

[arendsee]

This fails:

module tree (upgma)
import bio.algo (upgmaFromDist as upgma)

With error:

SerializationError: Cannot find constructor "RootedTree<$1,$2,$3>"<3> in packmap:
----- pacmaps -----

-------------------

The RootedTree constructor is defined by a module that bio.algo imports.

But this passes:

module tree (foo)
import bio.algo (upgmaFromDist as upgma)
foo x = upgma x

[arendsee]

Thanks for taking the time to submit this report! I really appreciate it! You are an awesome human being!

[arendsee]

A simpler case is:

module foo (keys)
import pybase (keys)

This fails to find the Map constructor.