[BUG] Many tests fail with unknown location(0): fatal error:

[yurivict]

Describe the bug

Most or all failures look like this:

$ tests/unconnected 
Running 2 test cases...
unknown location(0): fatal error: in "basic_test": boost::archive::archive_exception: unregistered void cast N5pagmo6detail10topo_innerINS_11unconnectedEEE<-N5pagmo6detail15topo_inner_baseE
/usr/ports/science/pagmo2/work/pagmo2-2.19.1/tests/unconnected.cpp(55): last checkpoint

*** 1 failure is detected in the test module "unconnected"

$ tests/translate 
Running 8 test cases...
unknown location(0): fatal error: in "translate_serialization_test": boost::archive::archive_exception: unregistered void cast N5pagmo6detail10prob_innerINS_9translateEEE<-N5pagmo6detail15prob_inner_baseE
/usr/ports/science/pagmo2/work/pagmo2-2.19.1/tests/translate.cpp(105): last checkpoint: "translate_serialization_test" test entry

*** 1 failure is detected in the test module "translate_test"

$ tests/unconstrain 
Running 8 test cases...
unknown location(0): fatal error: in "unconstrain_serialization_test": boost::archive::archive_exception: unregistered void cast N5pagmo6detail10prob_innerINS_11unconstrainEEE<-N5pagmo6detail15prob_inner_baseE
/usr/ports/science/pagmo2/work/pagmo2-2.19.1/tests/unconstrain.cpp(178): last checkpoint: "unconstrain_serialization_test" test entry

*** 1 failure is detected in the test module "unconstrain_test"

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

Environment (please complete the following information):

• OS: FreeBSD 14.1
• Installation method: port
• Version: 2.19.1

[jschueller]

fixed by #585