syntax_data: {"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"debug!(\"pat_from_hir({:?})"}]}
source_snippet:     debug!("pat_from_hir({:?}) = {:?}", pat, result);
context_before:     let result = pcx.lower_pattern(pat);
context_after:     if let Some(m) = pcx.rust_2024_migration {