Do not show ::{{constructor}} on tuple struct diagnostics

src/librustc/ty/item_path.rs

@@ -175,7 +175,6 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
             data @ DefPathData::LifetimeDef(..) |
             data @ DefPathData::EnumVariant(..) |
             data @ DefPathData::Field(..) |
-            data @ DefPathData::StructCtor |
             data @ DefPathData::Initializer |
             data @ DefPathData::MacroDef(..) |
             data @ DefPathData::ClosureExpr |
@@ -186,6 +185,10 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
                 self.push_item_path(buffer, parent_def_id);
                 buffer.push(&data.as_interned_str());
             }
+            DefPathData::StructCtor => { // present `X` instead of `X::{{constructor}}`
+                let parent_def_id = self.parent_def_id(def_id).unwrap();
+                self.push_item_path(buffer, parent_def_id);
+            }
         }
     }
 

src/test/compile-fail/numeric-fields.rs

@@ -19,6 +19,6 @@ fn main() {
     match s {
         S{0: a, 0x1: b, ..} => {}
         //~^ ERROR does not have a field named `0x1`
-        //~| NOTE struct `S::{{constructor}}` does not have field `0x1`
+        //~| NOTE struct `S` does not have field `0x1`
     }
 }