vlib/v/checker/tests/top_level_fn_builtin_decl_err.vv:2:1: error: top level declaration cannot shadow builtin type
    1 | @[inline]
    2 | fn char(ch u8) fn (string) !(u8, string) {
      | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    3 |     return fn [ch] (input string) !(u8, string) {
    4 |         return if input[0] == ch {
vlib/v/checker/tests/top_level_fn_builtin_decl_err.vv:18:18: error: unknown function: a_char
   16 | 
   17 |     for i, input in inputs {
   18 |         got, remain := a_char(input)!
      |                        ~~~~~~~~~~~~~
   19 | 
   20 |         assert got == 'a'[0]
vlib/v/checker/tests/top_level_fn_builtin_decl_err.vv:18:31: error: unexpected `!`, the function `a_char` does not return a Result
   16 | 
   17 |     for i, input in inputs {
   18 |         got, remain := a_char(input)!
      |                                     ^
   19 | 
   20 |         assert got == 'a'[0]
vlib/v/checker/tests/top_level_fn_builtin_decl_err.vv:18:15: error: assignment mismatch: 2 variables but `a_char()` returns 0 values
   16 | 
   17 |     for i, input in inputs {
   18 |         got, remain := a_char(input)!
      |                     ~~
   19 | 
   20 |         assert got == 'a'[0]
vlib/v/checker/tests/top_level_fn_builtin_decl_err.vv:20:10: error: invalid variable `got`
   18 |         got, remain := a_char(input)!
   19 | 
   20 |         assert got == 'a'[0]
      |                ~~~
   21 |         assert remain == remains[i]
   22 |     }
vlib/v/checker/tests/top_level_fn_builtin_decl_err.vv:20:10: error: assert can be used only with `bool` expressions, but found `void` instead
   18 |         got, remain := a_char(input)!
   19 | 
   20 |         assert got == 'a'[0]
      |                ~~~~~~~~~~~~~
   21 |         assert remain == remains[i]
   22 |     }
vlib/v/checker/tests/top_level_fn_builtin_decl_err.vv:21:10: error: invalid variable `remain`
   19 | 
   20 |         assert got == 'a'[0]
   21 |         assert remain == remains[i]
      |                ~~~~~~
   22 |     }
   23 | }
vlib/v/checker/tests/top_level_fn_builtin_decl_err.vv:21:10: error: assert can be used only with `bool` expressions, but found `void` instead
   19 | 
   20 |         assert got == 'a'[0]
   21 |         assert remain == remains[i]
      |                ~~~~~~~~~~~~~~~~~~~~
   22 |     }
   23 | }