error[E0277]: the size for values of type `[String]` cannot be known at compilation time
  --> $DIR/issue-22874.rs:2:11
   |
LL |     rows: [[String]],
   |           ^^^^^^^^^^ doesn't have a size known at compile-time
   |
   = help: the trait `Sized` is not implemented for `[String]`
   = note: slice and array elements must have `Sized` type

error: aborting due to previous error

For more information about this error, try `rustc --explain E0277`.