syntax_data: {"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"cx.tcx.hir_span(var_hir_id.0),"}]}
source_snippet:                 cx.tcx.hir_span(var_hir_id.0),
context_before:             PlaceBase::Upvar { var_hir_id, closure_def_id: _ } => span_bug!(
context_after:                 "could not resolve upvar: {var_hir_id:?} + {:?}",