Problem with portable dumper

[Michael Albinus]

Hi,

after sleeping for months, I have decided to revive the
feature/tramp-thread-safe branch. I've merged it with master, and I've
recompiled. This results in an error:

--8<---------------cut here---------------start------------->8---
Dumping under the name bootstrap-emacs.pdmp
dumping fingerprint: 
406add9509f46ad13554dfa8c2b5c4d2346e735f891479807515cd7a5226ec69
unsupported object type in dump: mutex
--8<---------------cut here---------------end--------------->8---

The error message comes from pdumper.c/dump_vectorlike, and it is likely
because I use threads, mutexes and condvars in some pre-loaded files,
like files.el or vc-hooks.el.

How could this be solved? Does dump_vectorlike needs to be extended?

Best regards, Michael.