syntax_data: {"ast_node_type":"impl","tokens":[{"end":83,"kind":"keyword","start":0,"text":".with_span_note(self.def_span(old_impl_did),"}]}
source_snippet:                     .with_span_note(self.def_span(old_impl_did), "other impl here")
context_before:                     .struct_span_err(self.def_span(impl_did), "multiple async drop impls found")
context_after:                     .delay_as_bug();