vlib/v/checker/tests/veb_context_param_mutability.vv:11:25: error: veb app method `index` must declare context parameter `ctx` as mutable, e.g. `mut ctx Context`
    9 | pub struct App {}
   10 | 
   11 | pub fn (app &App) index(ctx Context) veb.Result {
      |                         ~~~
   12 |     return veb.no_result()
   13 | }