syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"span_bug!(obligation.cause.span,"}]}
source_snippet:             span_bug!(obligation.cause.span, "object candidate with no principal")
context_before:         let object_trait_ref = data.principal().unwrap_or_else(|| {
context_after:         });