Have done some more testing and may have found something that I might be doing wrong.

the tag that is used in scm_new_smob in my example is not correctly exported from my lib.

I am mot sure about this and i don't understand it fully, but if i create a new tag just before using it in calls to scm_new_smob the library will load in guile.

So this bug should be probebly be closed.

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