{"ast_node_type":"variable","tokens":[{"end":121,"kind":"keyword","start":0,"text":"let"}]}
                    let mut alloc = self.ecx.get_ptr_alloc_mut(mplace.ptr(), size)?.expect("we already excluded size 0");
                    // We can't share this with above as above, we might be looking at read-only memory.
                    alloc.clear_provenance()?;