syntax_data: {"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":"diag.span(self.scrut_span);"}]}
source_snippet:         diag.span(self.scrut_span);
context_before:             Diag::new(dcx, level, fluent::mir_build_non_exhaustive_patterns_type_not_empty);
context_after:         diag.code(E0004);