vbox6-block: AddRef failed at MachineWrap.cpp(11269)

Do these symptoms look familiar? Any suggestions on how to fix or further diagnose?

[runtime -> vm-block -> vbox] main !!Assertion Failed!! [runtime -> vm-block -> vbox] main Expression: state <= 1 && ( (state == 0 && count == 0) || (state == 1 && count < PR_UINT32_MAX/2)) [runtime -> vm-block -> vbox] main Location : /home/alex/genode/sculpt/depot/alex-ab/src/vbox6/2022-11-21/src/virtualbox6/VBoxAPIWrap/MachineWrap.cpp(11269) virtual nsrefcnt MachineWrap::AddRef()

I'm using a local variant of https://depot.genode.org/alex-ab/pkg/vbox6-block/ . For my exact launcher and runtime, as well as more log context, see

https://github.com/dckc/madmode-blog/issues/49#issuecomment-1408787710