syntax_data: {"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"debug!(\"extended_cause_with_original_assoc_item_obligation"}]}
source_snippet:             debug!("extended_cause_with_original_assoc_item_obligation trait proj {:?}", pred);
context_before:             // Form 3: A trait obligation for an associated item failed to be met.
context_after:             if let Some(impl_item_span) = ty_to_impl_span(pred.self_ty()) {