exp_expression_with_stack: added check for null pointer after obtaining a mutex in test
@@ -22,6 +22,8 @@ TEST_CASE("test printf using shared buffer stack", "[newlib]")
TEST_ASSERT(shared_stack != NULL);
SemaphoreHandle_t printf_lock = xSemaphoreCreateMutex();
+ TEST_ASSERT_NOT_NULL(printf_lock);
+
ESP_EXECUTE_EXPRESSION_WITH_STACK(printf_lock, shared_stack,8192,printf("Executing this printf from external stack! \n"));
ESP_EXECUTE_EXPRESSION_WITH_STACK(printf_lock, shared_stack,8192,another_external_stack_function());
vSemaphoreDelete(printf_lock);
