The following (problematic) program gives critical errors in the compiler:

public class Test
{
	public delegate void MyType (uint8 data);
	public MyType my_func;
}

public class Big
{
	public void foo (uint8 data)
	{
		stdout.printf("%d\n", data);
	}


	public static int main(string[] args)
	{
		var t = new Test();
		t.my_func = foo;

		t.my_func(28);

   	return 0;
	}
}


The following errors are given:

** (valac:10518): CRITICAL **: vala_ccode_base_module_get_ccodenode: assertion `node != NULL' failed

** (valac:10518): CRITICAL **: vala_expression_get_value_type: assertion `self != NULL' failed

** (valac:10518): CRITICAL **: vala_data_type_get_data_type: assertion `self != NULL' failed

** (valac:10518): CRITICAL **: vala_ccode_assignment_construct: assertion `r != NULL' failed

** (valac:10518): CRITICAL **: vala_ccode_comma_expression_append_expression: assertion `expr != NULL' failed


Making the method foo static fixes the compilation.