error[E0433]: failed to resolve: `String` is a struct, not a module
  --> $DIR/unresolved-segments-visibility.rs:8:27
   |
LL |         pub(in b::string::String::newy) extern crate alloc as e;
   |                           ^^^^^^ `String` is a struct, not a module

error: aborting due to previous error

For more information about this error, try `rustc --explain E0433`.