syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"ty::ConstKind::Param(param_ct)"}]}
source_snippet:                         ty::ConstKind::Param(param_ct) => {
context_before:                         ty::ConstKind::Bound(_, _) => bug!("escaping bound vars in {:?}", ct),
context_after:                             param_ct.find_const_ty_from_env(obligation.param_env)