syntax_data: {"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // `ty::ConstKind::Error` is handled at the top of `layout_of_uncached`
context_before:         | ty::ConstKind::Error(_) => {
context_after:             // (via `ty.error_reported()`).