The ShEx generation that is included in the resource definitions are incorrect.  As an example, the definition for "integer" in patient.shex is:

Primitive Type integer
<integer> CLOSED {
    fhir:Element.id @<string>?; # xml:id (or equivalent in JSON)
{{    fhir:Element.extension @<Extension>*; # Additional content defined by }}
{{    # implementations }}
    fhir:value @<integer>?; # Primitive value for integer
    fhir:index xsd:integer? # Relative position in a list
}

The fhir:value element should actually be:

fhir:value xsd:integer.

This applies to all generated shex and all datatypes