syntax_data: {"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"this.tcx.dcx().emit_fatal(LoopMatchArmWithGuard"}]}
source_snippet:                             this.tcx.dcx().emit_fatal(LoopMatchArmWithGuard { span })
context_before:                             let span = this.thir.exprs[guard].span;
context_after:                         }