For purposes of that workaround, you could use
gml_const_add("inst_name", inst_name);
Perhaps I should expose/document the few of these as part of live_ functions
Yeah, this solves my problem!
Definitely worth mentioning in help docs then.
I have added more normally-named functions (live_constant_add, live_function_add, live_variable_add) and documentation for them in 1.0.33+
live_constant_add
live_function_add
live_variable_add
