syntax_data: {"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                     // Does this code ever run?
context_before:                     let p = bound_predicate.rebind(p);
context_after:                     match self.infcx.coerce_predicate(&obligation.cause, obligation.param_env, p) {