Add fallback variant when std::jthread is not available. (#24440)

* just use thread instead

Co-authored-by: Håvard Pettersen <havardpe@yahooinc.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/vespalib/src/tests/coro/lazy/lazy_test.cpp b/vespalib/src/tests/coro/lazy/lazy_test.cpp
index 3141d7a5363..b838152249e 100644
--- a/vespalib/src/tests/coro/lazy/lazy_test.cpp
+++ b/vespalib/src/tests/coro/lazy/lazy_test.cpp
@@ -12,9 +12,12 @@ using vespalib::coro::Lazy;
 using vespalib::coro::sync_wait;
 
 std::mutex thread_lock;
-std::vector<std::jthread> threads;
+std::vector<std::thread> threads;
 struct JoinThreads {
     ~JoinThreads() {
+        for (auto &thread: threads) {
+            thread.join();
+        }
         threads.clear();
     }
 };
@@ -24,7 +27,7 @@ auto run_in_other_thread() {
         bool await_ready() const noexcept { return false; }
         void await_suspend(std::coroutine_handle<> handle) const {
             auto guard = std::lock_guard(thread_lock);
-            threads.push_back(std::jthread(handle));
+            threads.push_back(std::thread(handle));
         }
         void await_resume() const noexcept {}
     };