syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"type_op_ascribe_user_type_with_span(ocx,"}]}
source_snippet:         type_op_ascribe_user_type_with_span(ocx, key, DUMMY_SP)
context_before:     tcx.infer_ctxt().enter_canonical_trait_query(&canonicalized, |ocx, key| {
context_after:     })