{"ast_node_type":"other","tokens":[{"end":104,"kind":"keyword","start":0,"text":"//"}]}
        // Special check for CTFE validation, preventing `UnsafeCell` inside unions in immutable memory.
    ) -> InterpResult<'tcx> {
        if self.ctfe_mode.is_some_and(|c| !c.allow_immutable_unsafe_cell()) {