Index: mlir/lib/ExecutionEngine/AsyncRuntime.cpp
===================================================================
--- mlir/lib/ExecutionEngine/AsyncRuntime.cpp
+++ mlir/lib/ExecutionEngine/AsyncRuntime.cpp
@@ -59,34 +59,33 @@

 extern "C" MLIR_ASYNCRUNTIME_EXPORT void
 mlirAsyncRuntimeExecute(CoroHandle handle, CoroResume resume) {
-  std::thread thread([handle, resume]() { (*resume)(handle); });
-  thread.detach();
+  (*resume)(handle);
 }

 extern "C" MLIR_ASYNCRUNTIME_EXPORT void
 mlirAsyncRuntimeAwaitTokenAndExecute(AsyncToken *token, CoroHandle handle,
                                      CoroResume resume) {
   std::unique_lock<std::mutex> lock(token->mu);

   auto execute = [token, handle, resume]() {
     mlirAsyncRuntimeExecute(handle, resume);
     delete token;
   };

   if (token->ready)
     execute();
   else
     token->awaiters.push_back([execute]() { execute(); });
 }

 //===----------------------------------------------------------------------===//
 // Small async runtime support library for testing.
 //===----------------------------------------------------------------------===//

 extern "C" MLIR_ASYNCRUNTIME_EXPORT void
 mlirAsyncRuntimePrintCurrentThreadId() {
   static thread_local std::thread::id thisId = std::this_thread::get_id();
   std::cout << "Current thread id: " << thisId << "\n";
 }

 #endif // MLIR_ASYNCRUNTIME_DEFINE_FUNCTIONS