syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:             if self.intercrate_ambiguity_causes.is_some() {
context_before:             debug!("coherence stage: not knowable");
context_after:                 debug!("evaluate_stack: intercrate_ambiguity_causes is some");