syntax_data: {"ast_node_type":"other","tokens":[{"end":14,"kind":"keyword","start":0,"text":"Ambiguity,"}]}
source_snippet:     Ambiguity,
context_before:     /// or we hit a case where we just don't bother, e.g. `?x: Trait` goals.
context_after:     /// We gave up due to an overflow, most often by hitting the recursion limit.