X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=src%2Flibrustc%2Fhir%2Flowering.rs;h=ef6a6ae23dc2f8efcd209a6443abfe2e592b1e0d;hb=c5bb2ec0dd1f6f38117ec0e7e22c077a4b74dc09;hp=9c09ce9948672e318b961e012b8d55a9e7967b33;hpb=82cf3a4486bc882207a09bf0d9e2dea4632781aa;p=rust.git

diff --git a/src/librustc/hir/lowering.rs b/src/librustc/hir/lowering.rs
index 9c09ce99486..ef6a6ae23dc 100644
--- a/src/librustc/hir/lowering.rs
+++ b/src/librustc/hir/lowering.rs
@@ -454,7 +454,6 @@ fn visit_item(&mut self, item: &'tcx Item) {
                     | ItemKind::Union(_, ref generics)
                     | ItemKind::Enum(_, ref generics)
                     | ItemKind::TyAlias(_, ref generics)
-                    | ItemKind::OpaqueTy(_, ref generics)
                     | ItemKind::Trait(_, _, ref generics, ..) => {
                         let def_id = self.lctx.resolver.definitions().local_def_id(item.id);
                         let count = generics
@@ -1862,15 +1861,16 @@ fn lower_path_segment(
                         if let Ok(snippet) = self.sess.source_map().span_to_snippet(data.span) {
                             // Do not suggest going from `Trait()` to `Trait<>`
                             if data.inputs.len() > 0 {
-                                let split = snippet.find('(').unwrap();
-                                let trait_name = &snippet[0..split];
-                                let args = &snippet[split + 1 .. snippet.len() - 1];
-                                err.span_suggestion(
-                                    data.span,
-                                    "use angle brackets instead",
-                                    format!("{}<{}>", trait_name, args),
-                                    Applicability::MaybeIncorrect,
-                                );
+                                if let Some(split) = snippet.find('(') {
+                                    let trait_name = &snippet[0..split];
+                                    let args = &snippet[split + 1 .. snippet.len() - 1];
+                                    err.span_suggestion(
+                                        data.span,
+                                        "use angle brackets instead",
+                                        format!("{}<{}>", trait_name, args),
+                                        Applicability::MaybeIncorrect,
+                                    );
+                                }
                             }
                         };
                         err.emit();