{"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"alloc.clear_provenance()?;"}]}
                    alloc.clear_provenance()?;
                    let mut alloc = self.ecx.get_ptr_alloc_mut(mplace.ptr(), size)?.expect("we already excluded size 0");
                    // Also, mark this as containing data, not padding.