Error: (u8vector->blob/shared) bad argument type - not a structure of the required type
#<unspecified>
u8vector

        Call history:

        ugarit-core.scm:655: backend-log!501750255026     
        ugarit-core.scm:655: backend-log!501750255026     
        ugarit-core.scm:657: unwrap-block         
        ugarit-core.scm:592: g4792        
        ugarit-core.scm:592: g4790        
        ugarit-core.scm:401: u8vector-ref         
        ugarit-core.scm:659: g5056        
        ugarit-core.scm:433: prim         
        ugarit-core.scm:435: prim         
        ugarit-core.scm:435: message-digest-srfi-4#message-digest-u8vector        
        ugarit-core.scm:1450: k6674       
        ugarit-core.scm:1450: g6678       
        ugarit-core.scm:1450: ##sys#signal        
        ugarit-core.scm:1450: k6674       
        ugarit-core.scm:1450: g6678       
        ugarit-core.scm:1450: ##sys#signal