syntax_data: {"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if place.local == ty::CAPTURE_STRUCT_LOCAL
context_before:         // arg from calling the closure, but instead an upvar.
context_after:             && let Some((&mir::ProjectionElem::Field(idx, _), projection)) =