syntax_data: {"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"init_scope.span(this.tcx,"}]}
source_snippet:                         init_scope.span(this.tcx, this.region_scope_tree),
context_before:                     span_bug!(
context_after:                         "initializer is missing, but else block is present in this let binding",