1 files changed, 2 insertions, 2 deletions
diff --git a/src/cfg/cfg-traversal.h b/src/cfg/cfg-traversal.h
index 9b2027c42..faaa3c830 100644
--- a/src/cfg/cfg-traversal.h
+++ b/src/cfg/cfg-traversal.h
@@ -536,8 +536,8 @@ private:
   void checkDuplicates(std::vector<BasicBlock*>& list) {
     std::unordered_set<BasicBlock*> seen;
     for (auto* curr : list) {
-      assert(seen.count(curr) == 0);
-      seen.insert(curr);
+      auto res = seen.emplace(curr);
+      assert(res.second);
     }
   }