``` clang [...] -c valaprog.p/GLib.Thread.c ../test cases/vala/5 target glib/GLib.Thread.vala:17:17: error: incompatible integer to pointer conversion passing 'gint' (aka 'int') to parameter of type 'gpointer' (aka 'void *') [-Wint-conversion] g_thread_exit (get_ret_code ()); ^~~~~~~~~~~~~~~ /usr/include/glib-2.0/glib/gthread.h:158:66: note: passing argument to parameter 'retval' here void g_thread_exit (gpointer retval); ^ 1 error generated. ```