Fix deadlock in ThreadPool unittest.

(Yes, this only deadlocks on a computer with a single core; I'm using
a virtual machine.)

llvm-svn: 271855

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/unittests/Support/ThreadPool.cpp b/llvm/unittests/Support/ThreadPool.cpp
index 0f36c383d49..69a24bc5444 100644
--- a/llvm/unittests/Support/ThreadPool.cpp
+++ b/llvm/unittests/Support/ThreadPool.cpp
@@ -135,7 +135,7 @@ TEST_F(ThreadPoolTest, Async) {
 
 TEST_F(ThreadPoolTest, GetFuture) {
   CHECK_UNSUPPORTED();
-  ThreadPool Pool;
+  ThreadPool Pool{2};
   std::atomic_int i{0};
   Pool.async([this, &i] {
     waitForMainThread();