error[E0718]: `add` lang item must be applied to a trait with 1 generic argument
  --> $DIR/lang-item-generic-requirements.rs:10:1
   |
LL | #[lang = "add"]
   | ^^^^^^^^^^^^^^^
LL | trait MyAdd<'a, T> {}
   |            ------- this trait has 2 generic arguments

error[E0718]: `drop_in_place` lang item must be applied to a function with at least 1 generic argument
  --> $DIR/lang-item-generic-requirements.rs:14:1
   |
LL | #[lang = "drop_in_place"]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^
LL |
LL | fn my_ptr_drop() {}
   |               - this function has 0 generic arguments

error[E0718]: `index` lang item must be applied to a trait with 1 generic argument
  --> $DIR/lang-item-generic-requirements.rs:18:1
   |
LL | #[lang = "index"]
   | ^^^^^^^^^^^^^^^^^
LL | trait MyIndex<'a, T> {}
   |              ------- this trait has 2 generic arguments

error[E0718]: `phantom_data` lang item must be applied to a struct with 1 generic argument
  --> $DIR/lang-item-generic-requirements.rs:22:1
   |
LL | #[lang = "phantom_data"]
   | ^^^^^^^^^^^^^^^^^^^^^^^^
LL |
LL | struct MyPhantomData<T, U>;
   |                     ------ this struct has 2 generic arguments

error[E0718]: `owned_box` lang item must be applied to a struct with at least 1 generic argument
  --> $DIR/lang-item-generic-requirements.rs:28:1
   |
LL | #[lang = "owned_box"]
   | ^^^^^^^^^^^^^^^^^^^^^
LL |
LL | struct Foo;
   |           - this struct has 0 generic arguments

error[E0718]: `start` lang item must be applied to a function with 1 generic argument
  --> $DIR/lang-item-generic-requirements.rs:34:1
   |
LL | #[lang = "start"]
   | ^^^^^^^^^^^^^^^^^
LL |
LL | fn start(_: *const u8, _: isize, _: *const *const u8) -> isize {
   |         - this function has 0 generic arguments

error[E0392]: type parameter `T` is never used
  --> $DIR/lang-item-generic-requirements.rs:24:22
   |
LL | struct MyPhantomData<T, U>;
   |                      ^ unused type parameter
   |
   = help: consider removing `T` or referring to it in a field
   = help: if you intended `T` to be a const parameter, use `const T: /* Type */` instead

error[E0392]: type parameter `U` is never used
  --> $DIR/lang-item-generic-requirements.rs:24:25
   |
LL | struct MyPhantomData<T, U>;
   |                         ^ unused type parameter
   |
   = help: consider removing `U` or referring to it in a field
   = help: if you intended `U` to be a const parameter, use `const U: /* Type */` instead

error[E0369]: cannot add `{integer}` to `{integer}`
  --> $DIR/lang-item-generic-requirements.rs:44:7
   |
LL |     r + a;
   |     - ^ - {integer}
   |     |
   |     {integer}

error: requires `copy` lang_item

error: aborting due to 10 previous errors

Some errors have detailed explanations: E0369, E0392, E0718.
For more information about an error, try `rustc --explain E0369`.