Use TypedArena::alloc_slice in rustc.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/librustc_metadata/decoder.rs b/src/librustc_metadata/decoder.rs
index bdb4d383cee..e18fd581443 100644
--- a/src/librustc_metadata/decoder.rs
+++ b/src/librustc_metadata/decoder.rs
@@ -374,7 +374,7 @@ impl<'a, 'tcx> SpecializedDecoder<ty::GenericPredicates<'tcx>> for DecodeContext
 
 impl<'a, 'tcx> SpecializedDecoder<&'tcx Substs<'tcx>> for DecodeContext<'a, 'tcx> {
     fn specialized_decode(&mut self) -> Result<&'tcx Substs<'tcx>, Self::Error> {
-        Ok(self.tcx().mk_substs(Decodable::decode(self)?))
+        Ok(self.tcx().mk_substs(&Vec::decode(self)?))
     }
 }
 
@@ -386,7 +386,7 @@ impl<'a, 'tcx> SpecializedDecoder<&'tcx ty::Region> for DecodeContext<'a, 'tcx>
 
 impl<'a, 'tcx> SpecializedDecoder<&'tcx ty::Slice<Ty<'tcx>>> for DecodeContext<'a, 'tcx> {
     fn specialized_decode(&mut self) -> Result<&'tcx ty::Slice<Ty<'tcx>>, Self::Error> {
-        Ok(self.tcx().mk_type_list(Decodable::decode(self)?))
+        Ok(self.tcx().mk_type_list(&Vec::decode(self)?))
     }
 }