syntax_data: {"ast_node_type":"variable","tokens":[{"end":60,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let Ok(attrs) = RustcMirAttrs::parse(tcx, def_id) else {
context_before:     let def_id = body.source.def_id();
context_after:         // Invalid `rustc_mir` attrs are reported in `RustcMirAttrs::parse`