Fix ref counting bug in cpu-hello-world (#1119)

* Fix ref counting bug in cpu-hello-world that meant session was not released correctly.

* Fix typo.

1 files changed, 4 insertions, 1 deletions

diff --git a/examples/cpu-hello-world/main.cpp b/examples/cpu-hello-world/main.cpp
index 4ece04da2..6e06f64bc 100644
--- a/examples/cpu-hello-world/main.cpp
+++ b/examples/cpu-hello-world/main.cpp
@@ -49,7 +49,10 @@ static SlangResult _innerMain(int argc, char** argv)
     // somewhat heavy-weight operation. When possible, an application
     // should try to re-use the same session across multiple compiles.
     //
-    ComPtr<slang::IGlobalSession> slangSession(spCreateSession(NULL));
+    // NOTE that we use attach instead of setting via assignment, as assignment will increase
+    // the refcount. spCreateSession returns a IGlobalSession with a refcount of 1.
+    ComPtr<slang::IGlobalSession> slangSession;
+    slangSession.attach(spCreateSession(NULL));
 
     // As touched on earlier, in order to generate the final executable code,
     // the slang code is converted into C++, and that C++ needs a 'prelude' which