Function rustc_middle::util::bug::trigger_delay_span_bug

pub fn trigger_delay_span_bug(tcx: TyCtxt<'_>, key: DefId)

A query to trigger a delay_span_bug. Clearly, if one has a tcx one can already trigger a delay_span_bug, so what is the point of this? It exists to help us test delay_span_bug's interactions with the query system and incremental.