syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"tcx.infer_ctxt().enter_canonical_trait_query(&canonicalized,"}]}
source_snippet:     tcx.infer_ctxt().enter_canonical_trait_query(&canonicalized, |ocx, key| {
context_before: ) -> Result<&'tcx Canonical<'tcx, QueryResponse<'tcx, ()>>, NoSolution> {
context_after:         type_op_ascribe_user_type_with_span(ocx, key, DUMMY_SP)