error[E0271]: expected `impl Iterator<Item = char>` to be an iterator that yields `{integer}`, but it yields `char`
 --> tests/compile-fail/surface_merge_badtypes.rs:7:9
  |
5 |         m = union() -> for_each(std::mem::drop);
  |             ------- required by a bound introduced by this call
6 |         source_iter(0..10) -> m;
7 |         source_iter("hello".chars()) -> m;
  |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected integer, found `char`
  |
note: required by a bound in `check_inputs`
 --> tests/compile-fail/surface_merge_badtypes.rs:5:13
  |
5 |         m = union() -> for_each(std::mem::drop);
  |             ^^^^^^^ required by this bound in `check_inputs`

error[E0271]: expected `impl Iterator<Item = char>` to be an iterator that yields `{integer}`, but it yields `char`
 --> tests/compile-fail/surface_merge_badtypes.rs:5:13
  |
5 |         m = union() -> for_each(std::mem::drop);
  |             ^^^^^^^ expected integer, found `char`
  |
note: required by a bound in `check_inputs`
 --> tests/compile-fail/surface_merge_badtypes.rs:5:13
  |
5 |         m = union() -> for_each(std::mem::drop);
  |             ^^^^^^^ required by this bound in `check_inputs`

error[E0271]: expected `impl Iterator<Item = char>` to be an iterator that yields `{integer}`, but it yields `char`
 --> tests/compile-fail/surface_merge_badtypes.rs:5:13
  |
5 |         m = union() -> for_each(std::mem::drop);
  |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected integer, found `char`
  |
note: required by a bound in `check_inputs`
 --> tests/compile-fail/surface_merge_badtypes.rs:5:13
  |
5 |         m = union() -> for_each(std::mem::drop);
  |             ^^^^^^^ required by this bound in `check_inputs`