c3c/test/test_suite/generic/used_without_param2.c3

// #deprecation: no
module test;
import std::collections::maybe;

fn void test()
{
    maybe::Maybe{float} f = (Maybe) {.value=6.6, .has_value=true};
    Maybe x; // #error: 'Maybe' is a generic struct, did you forget the parameters '{ ... }'?
}