error: Deref cannot be derived for multi-field structs without a `#[deref]` attribute on one field.
  --> tests/inc/deref/compile_fail_complex_struct.rs:5:1
   |
5  | / #[ allow( dead_code ) ]
6  | | #[ derive( Debug, Clone, Copy, PartialEq, Deref ) ]
7  | | pub struct IsTransparentComplex< 'a, 'b : 'a, T, U : ToString + ?Sized, const N : usize >( &'a T, PhantomData< &'b U > )
8  | | where
9  | |   'a : 'b,
10 | |   T : AsRef< U >;
   | |_________________^

warning: unused import: `core::ops::Deref`
 --> tests/inc/deref/compile_fail_complex_struct.rs:1:5
  |
1 | use core::ops::Deref;
  |     ^^^^^^^^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

warning: unused import: `test_tools::a_id`
 --> tests/inc/deref/./only_test/compile_fail_complex_struct.rs
  |
  | use test_tools::a_id;
  |     ^^^^^^^^^^^^^^^^

error[E0601]: `main` function not found in crate `$CRATE`
  --> tests/inc/deref/compile_fail_complex_struct.rs:12:58
   |
12 | include!( "./only_test/compile_fail_complex_struct.rs" );
   |                                                          ^ consider adding a `main` function to `$DIR/tests/inc/deref/compile_fail_complex_struct.rs`
