Continue parsing function after finding `...` arg

When encountering a variadic argument in a function definition that
doesn't accept it, if immediately after there's a closing paren,
continue parsing as normal. Otherwise keep current behavior of emitting
error and stopping.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/test/ui/invalid-variadic-function.rs b/src/test/ui/invalid-variadic-function.rs
new file mode 100644
index 00000000000..3d421e00b08
--- /dev/null
+++ b/src/test/ui/invalid-variadic-function.rs
@@ -0,0 +1,13 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern "C" fn foo(x: u8, ...);
+//~^ ERROR only foreign functions are allowed to be variadic
+//~| ERROR expected one of `->`, `where`, or `{`, found `;`