rustc_errors: let `DiagnosticBuilder::emit` return a "guarantee of emission".

3 files changed, 5 insertions, 3 deletions

diff --git a/compiler/rustc_passes/src/check_attr.rs b/compiler/rustc_passes/src/check_attr.rs
index 3d69e8ba4e4..0786a42fc11 100644
--- a/compiler/rustc_passes/src/check_attr.rs
+++ b/compiler/rustc_passes/src/check_attr.rs
@@ -2095,7 +2095,7 @@ fn check_invalid_crate_level_attr(tcx: TyCtxt<'_>, attrs: &[Attribute]) {
                             rustc_errors::Applicability::MachineApplicable,
                         );
                     }
-                    err.emit()
+                    err.emit();
                 }
             }
         }
diff --git a/compiler/rustc_passes/src/check_const.rs b/compiler/rustc_passes/src/check_const.rs
index 2b11f6b0c1d..0fdbdb7b08d 100644
--- a/compiler/rustc_passes/src/check_const.rs
+++ b/compiler/rustc_passes/src/check_const.rs
@@ -219,7 +219,9 @@ impl<'tcx> CheckConstVisitor<'tcx> {
             required_gates.iter().copied().filter(|&g| !features.enabled(g)).collect();
 
         match missing_gates.as_slice() {
-            [] => struct_span_err!(tcx.sess, span, E0744, "{}", msg).emit(),
+            [] => {
+                struct_span_err!(tcx.sess, span, E0744, "{}", msg).emit();
+            }
 
             [missing_primary, ref missing_secondary @ ..] => {
                 let mut err = feature_err(&tcx.sess.parse_sess, *missing_primary, span, &msg);
diff --git a/compiler/rustc_passes/src/intrinsicck.rs b/compiler/rustc_passes/src/intrinsicck.rs
index d7dde157864..b2129ce9f24 100644
--- a/compiler/rustc_passes/src/intrinsicck.rs
+++ b/compiler/rustc_passes/src/intrinsicck.rs
@@ -118,7 +118,7 @@ impl<'tcx> ExprVisitor<'tcx> {
             err.note(&format!("source type: `{}` ({})", from, skeleton_string(from, sk_from)))
                 .note(&format!("target type: `{}` ({})", to, skeleton_string(to, sk_to)));
         }
-        err.emit()
+        err.emit();
     }
 
     fn is_thin_ptr_ty(&self, ty: Ty<'tcx>) -> bool {