vlib/v/checker/tests/array_of_refs_mutability.vv:11:14: warning: cannot add a reference to an immutable object to a mutable array
    9 |     }
   10 | 
   11 |     mut arr := [&x]
      |                 ^
   12 |     arr[0].bar = 30
   13 |
vlib/v/checker/tests/array_of_refs_mutability.vv:15:10: warning: cannot add a reference to an immutable object to a mutable array
   13 | 
   14 |     mut arr2 := [&Foo{}]
   15 |     arr2 = [&x]
      |             ^
   16 |     arr2[0].bar = 40
   17 | }
