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diff --git a/src/test/ui/c-variadic/variadic-ffi-1.stderr b/src/test/ui/c-variadic/variadic-ffi-1.stderr
new file mode 100644
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+++ b/src/test/ui/c-variadic/variadic-ffi-1.stderr
@@ -0,0 +1,100 @@
+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`.