syntax_data: {"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // (via `ty.error_reported()`).
context_before:             // `ty::ConstKind::Error` is handled at the top of `layout_of_uncached`
context_after:             bug!("layout_of: unexpected const: {ct:?}");