syntax_data: {"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"Err(AlwaysRequiresDrop)"}]}
source_snippet:                     Err(AlwaysRequiresDrop)
context_before:                     debug!("drop_tys_helper: `{:?}` implements `Drop`", adt_def);
context_after:                 }