syntax_data: {"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"Err(effects::EvaluationFailure::Ambiguous)"}]}
source_snippet:                             Err(effects::EvaluationFailure::Ambiguous) => Ok(EvaluatedToAmbig),
context_before:                             }
context_after:                             Err(effects::EvaluationFailure::NoSolution) => Ok(EvaluatedToErr),