vlib/v/checker/tests/interface_generic_err.vv:7:9: error: generic struct init must specify type parameter, e.g. Foo<int>
    5 | 
    6 | // no segfault without generic
    7 | what := What{}
      |         ~~~~~~
    8 | why := Why(what)
vlib/v/checker/tests/interface_generic_err.vv:8:8: error: could not infer generic type `T` in interface `Why`
    6 | // no segfault without generic
    7 | what := What{}
    8 | why := Why(what)
      |        ~~~~~~~~~
