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-rw-r--r--compiler/rustc_resolve/src/def_collector.rs8
1 files changed, 8 insertions, 0 deletions
diff --git a/compiler/rustc_resolve/src/def_collector.rs b/compiler/rustc_resolve/src/def_collector.rs
index 75972a71c8e..42f8424c76a 100644
--- a/compiler/rustc_resolve/src/def_collector.rs
+++ b/compiler/rustc_resolve/src/def_collector.rs
@@ -285,6 +285,14 @@ impl<'a, 'ra, 'tcx> visit::Visitor<'a> for DefCollector<'a, 'ra, 'tcx> {
         });
     }
 
+    fn visit_where_predicate(&mut self, pred: &'a WherePredicate) {
+        if pred.is_placeholder {
+            self.visit_macro_invoc(pred.id)
+        } else {
+            visit::walk_where_predicate(self, pred)
+        }
+    }
+
     fn visit_variant_data(&mut self, data: &'a VariantData) {
         // The assumption here is that non-`cfg` macro expansion cannot change field indices.
         // It currently holds because only inert attributes are accepted on fields,