diff --git a/mlir/lib/Pass/PassRegistry.cpp b/mlir/lib/Pass/PassRegistry.cpp
--- a/mlir/lib/Pass/PassRegistry.cpp
+++ b/mlir/lib/Pass/PassRegistry.cpp
@@ -100,9 +100,7 @@
   // TODO: We should use the 'arg' as the lookup key instead of the pass id.
   const PassID *passID = function()->getPassID();
   PassInfo passInfo(arg, description, passID, function);
-  bool inserted = passRegistry->try_emplace(passID, passInfo).second;
-  assert(inserted && "Pass registered multiple times");
-  (void)inserted;
+  passRegistry->try_emplace(passID, passInfo);
 }
 
 /// Returns the pass info for the specified pass class or null if unknown.