Merge pull request #794 from vinser52/svinogra.minor_fixes

Fix umfPoolDestroy to destroy providers in the right order

src/memory_pool.c

@@ -76,18 +76,20 @@ static umf_result_t umfPoolCreateInternal(const umf_memory_pool_ops_t *ops,
 
 void umfPoolDestroy(umf_memory_pool_handle_t hPool) {
     hPool->ops.finalize(hPool->pool_priv);
-    if (hPool->flags & UMF_POOL_CREATE_FLAG_OWN_PROVIDER) {
-        // Destroy associated memory provider.
-        umf_memory_provider_handle_t hProvider = NULL;
-        umfPoolGetMemoryProvider(hPool, &hProvider);
-        umfMemoryProviderDestroy(hProvider);
-    }
+
+    umf_memory_provider_handle_t hUpstreamProvider = NULL;
+    umfPoolGetMemoryProvider(hPool, &hUpstreamProvider);
 
     if (!(hPool->flags & UMF_POOL_CREATE_FLAG_DISABLE_TRACKING)) {
         // Destroy tracking provider.
         umfMemoryProviderDestroy(hPool->provider);
     }
 
+    if (hPool->flags & UMF_POOL_CREATE_FLAG_OWN_PROVIDER) {
+        // Destroy associated memory provider.
+        umfMemoryProviderDestroy(hUpstreamProvider);
+    }
+
     LOG_INFO("Memory pool destroyed: %p", (void *)hPool);
 
     // TODO: this free keeps memory in base allocator, so it can lead to OOM in some scenarios (it should be optimized)