{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"crate::ConstScalar::Unknown"}]}
                crate::ConstScalar::Unknown => self.new_const_var(data.ty.clone()),
            ConstValue::Concrete(cc) => match &cc.interned {
                // try to evaluate unevaluated const. Replace with new var if const eval failed.