When a type error occurs, check_method_argument_types() tries to provide
arguments filled with ty::mk_err(). However, if a function takes the
parameters as a tuple, the arguments should be converted to a tuple
before being passed to check_argument_types().
Fixes #19521.
tuple_arguments: TupleArgumentsFlag)
-> ty::FnOutput<'tcx> {
if ty::type_is_error(method_fn_ty) {
- let err_inputs = err_args(args_no_rcvr.len());
+ let err_inputs = err_args(args_no_rcvr.len());
+
+ let err_inputs = match tuple_arguments {
+ DontTupleArguments => err_inputs,
+ TupleArguments => vec![ty::mk_tup(fcx.tcx(), err_inputs)],
+ };
+
check_argument_types(fcx,
sp,
err_inputs.as_slice(),
--- /dev/null
+// Copyright 2014 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.
+
+#![feature(unboxed_closures)]
+
+fn main() {
+ "".homura()(); //~ ERROR does not implement any method
+}