syntax_data: {"ast_node_type":"other","tokens":[{"end":15,"kind":"keyword","start":0,"text":"panic!("}]}
source_snippet:         panic!(
context_before:     fn type_param_out_of_range(&self, p: I::ParamTy, ty: I::Ty) -> ! {
context_after:             "type parameter `{:?}` ({:?}/{}) out of range when instantiating, args={:?}",