syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"lint.span"}]}
source_snippet:             lint.span = None; // Don't label the pattern itself
context_before:             // Empty pattern; we report the uninhabited type that caused the emptiness.
context_after:             lint.uninhabited_note = Some(()); // Give a link about empty types