syntax_data: {"ast_node_type":"variable","tokens":[{"end":88,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:             if let Err(SelectionError::Overflow(OverflowError::Canonical)) = candidate {
context_before:         if self.can_use_global_caches(param_env, cache_fresh_trait_pred) {
context_after:                 // Don't cache overflow globally; we only produce this in certain modes.