got it to work, at least on my system

Debug/Core/Src/main.su

@@ -0,0 +1,6 @@
+../Core/Src/main.c:65:5:main	8	static
+../Core/Src/main.c:112:6:SystemClock_Config	88	static
+../Core/Src/main.c:158:13:MX_NVIC_Init	8	static
+../Core/Src/main.c:170:13:MX_GPIO_Init	40	static
+../Core/Src/main.c:205:6:HAL_GPIO_EXTI_Callback	16	static
+../Core/Src/main.c:228:6:Error_Handler	4	static,ignoring_inline_asm