error[E0045]: C-variadic function must have C or cdecl calling convention
  --> $DIR/variadic-ffi-1.rs:9:5
   |
LL |     fn printf(_: *const u8, ...);
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ C-variadics require C or cdecl calling convention

error[E0060]: this function takes at least 2 arguments but 0 arguments were supplied
  --> $DIR/variadic-ffi-1.rs:20:9
   |
LL |         foo();
   |         ^^^-- two arguments of type `isize` and `u8` are missing
   |
note: function defined here
  --> $DIR/variadic-ffi-1.rs:13:8
   |
LL |     fn foo(f: isize, x: u8, ...);
   |        ^^^
help: provide the arguments
   |
LL |         foo(/* isize */, /* u8 */);
   |         ~~~~~~~~~~~~~~~~~~~~~~~~~~

error[E0060]: this function takes at least 2 arguments but 1 argument was supplied
  --> $DIR/variadic-ffi-1.rs:21:9
   |
LL |         foo(1);
   |         ^^^--- an argument of type `u8` is missing
   |
note: function defined here
  --> $DIR/variadic-ffi-1.rs:13:8
   |
LL |     fn foo(f: isize, x: u8, ...);
   |        ^^^
help: provide the argument
   |
LL |         foo(1, /* u8 */);
   |         ~~~~~~~~~~~~~~~~

error[E0308]: mismatched types
  --> $DIR/variadic-ffi-1.rs:23:56
   |
LL |         let x: unsafe extern "C" fn(f: isize, x: u8) = foo;
   |                -------------------------------------   ^^^ expected non-variadic fn, found variadic function
   |                |
   |                expected due to this
   |
   = note: expected fn pointer `unsafe extern "C" fn(_, _)`
                 found fn item `unsafe extern "C" fn(_, _, ...) {foo}`

error[E0308]: mismatched types
  --> $DIR/variadic-ffi-1.rs:24:54
   |
LL |         let y: extern "C" fn(f: isize, x: u8, ...) = bar;
   |                -----------------------------------   ^^^ expected variadic fn, found non-variadic function
   |                |
   |                expected due to this
   |
   = note: expected fn pointer `extern "C" fn(_, _, ...)`
                 found fn item `extern "C" fn(_, _) {bar}`

error[E0617]: can't pass `f32` to variadic function
  --> $DIR/variadic-ffi-1.rs:26:19
   |
LL |         foo(1, 2, 3f32);
   |                   ^^^^ help: cast the value to `c_double`: `3f32 as c_double`

error[E0617]: can't pass `bool` to variadic function
  --> $DIR/variadic-ffi-1.rs:27:19
   |
LL |         foo(1, 2, true);
   |                   ^^^^ help: cast the value to `c_int`: `true as c_int`

error[E0617]: can't pass `i8` to variadic function
  --> $DIR/variadic-ffi-1.rs:28:19
   |
LL |         foo(1, 2, 1i8);
   |                   ^^^ help: cast the value to `c_int`: `1i8 as c_int`

error[E0617]: can't pass `u8` to variadic function
  --> $DIR/variadic-ffi-1.rs:29:19
   |
LL |         foo(1, 2, 1u8);
   |                   ^^^ help: cast the value to `c_uint`: `1u8 as c_uint`

error[E0617]: can't pass `i16` to variadic function
  --> $DIR/variadic-ffi-1.rs:30:19
   |
LL |         foo(1, 2, 1i16);
   |                   ^^^^ help: cast the value to `c_int`: `1i16 as c_int`

error[E0617]: can't pass `u16` to variadic function
  --> $DIR/variadic-ffi-1.rs:31:19
   |
LL |         foo(1, 2, 1u16);
   |                   ^^^^ help: cast the value to `c_uint`: `1u16 as c_uint`

error: aborting due to 11 previous errors

Some errors have detailed explanations: E0045, E0060, E0308, E0617.
For more information about an error, try `rustc --explain E0045`.