diff options
| -rw-r--r-- | src/librustc/traits/select.rs | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/librustc/traits/select.rs b/src/librustc/traits/select.rs index 887edc50364..3fcd79f706b 100644 --- a/src/librustc/traits/select.rs +++ b/src/librustc/traits/select.rs @@ -1305,9 +1305,8 @@ impl<'cx, 'gcx, 'tcx> SelectionContext<'cx, 'gcx, 'tcx> { &mut candidates)?; } else if self.tcx().lang_items.unsize_trait() == Some(def_id) { self.assemble_candidates_for_unsizing(obligation, &mut candidates); - } else if self.tcx().lang_items.gen_trait() == Some(def_id) { - self.assemble_generator_candidates(obligation, &mut candidates)?; } else { + self.assemble_generator_candidates(obligation, &mut candidates)?; self.assemble_closure_candidates(obligation, &mut candidates)?; self.assemble_fn_pointer_candidates(obligation, &mut candidates)?; self.assemble_candidates_from_impls(obligation, &mut candidates)?; @@ -1497,6 +1496,10 @@ impl<'cx, 'gcx, 'tcx> SelectionContext<'cx, 'gcx, 'tcx> { candidates: &mut SelectionCandidateSet<'tcx>) -> Result<(),SelectionError<'tcx>> { + if self.tcx().lang_items.gen_trait() != Some(obligation.predicate.def_id()) { + return Ok(()); + } + let self_ty = *obligation.self_ty().skip_binder(); let (closure_def_id, substs) = match self_ty.sty { ty::TyGenerator(id, substs, _) => (id, substs), |