syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // SAFETY: This is never called when `Self` is not `Ty<'tcx>`.
context_before:     fn from_cycle_error(tcx: TyCtxt<'tcx>, _: &CycleError, guar: ErrorGuaranteed) -> Self {
context_after:         // FIXME: Represent the above fact in the trait system somehow.