syntax_data: {"ast_node_type":"other","tokens":[{"end":15,"kind":"keyword","start":0,"text":"panic!("}]}
source_snippet:         panic!(
context_before:     fn region_param_out_of_range(&self, ebr: I::EarlyParamRegion, r: I::Region) -> ! {
context_after:             "region parameter `{:?}` ({:?}/{}) out of range when instantiating args={:?}",