syntax_data: {"ast_node_type":"other","tokens":[{"end":30,"kind":"keyword","start":0,"text":"span_bug!("}]}
source_snippet:                     span_bug!(
context_before:                 StmtKind::Let { init_scope, initializer: None, else_block: Some(_), .. } => {
context_after:                         init_scope.span(this.tcx, this.region_scope_tree),