syntax_data: {"ast_node_type":"variable","tokens":[{"end":72,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                     let block = subcandidate.pre_binding_block.unwrap();
context_before:                 candidate.visit_leaves(|subcandidate| {
context_after:                     // That block is already unreachable but needs a terminator to make the MIR well-formed.