New upstream version 1.56.0~beta.4+dfsg1

[rustc.git] / compiler / rustc_trait_selection / src / traits / error_reporting / on_unimplemented.rs

diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/on_unimplemented.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/on_unimplemented.rs
index 0ca0245a203d1ef0f90c9edc2ce2da20aadaff0b..3a32f1cb903e583f24117db65fc84197e2aa3b84 100644 (file)
--- a/compiler/rustc_trait_selection/src/traits/error_reporting/on_unimplemented.rs
+++ b/compiler/rustc_trait_selection/src/traits/error_reporting/on_unimplemented.rs
@@ -124,11 +124,10 @@ impl<'a, 'tcx> InferCtxtExt<'tcx> for InferCtxt<'a, 'tcx> {
             self.impl_similar_to(trait_ref, obligation).unwrap_or_else(|| trait_ref.def_id());
         let trait_ref = trait_ref.skip_binder();
 
-        let mut flags = vec![];
-        flags.push((
+        let mut flags = vec![(
             sym::ItemContext,
             self.describe_enclosure(obligation.cause.body_id).map(|s| s.to_owned()),
-        ));
+        )];
 
         match obligation.cause.code {
             ObligationCauseCode::BuiltinDerivedObligation(..)