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diff --git a/src/test/compile-fail/const-eval-overflow-3b.rs b/src/test/compile-fail/const-eval-overflow-3b.rs
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+// Copyright 2015 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.
+
+// Evaluation of constants in array-elem count goes through different
+// compiler control-flow paths.
+//
+// This test is checking the count in an array expression.
+//
+// This is a variation of another such test, but in this case the
+// types for the left- and right-hand sides of the addition do not
+// match (as well as overflow).
+
+#![allow(unused_imports)]
+
+use std::fmt;
+use std::{i8, i16, i32, i64, isize};
+use std::{u8, u16, u32, u64, usize};
+
+const A_I8_I
+    : [u32; (i8::MAX as usize) + 1]
+    = [0; (i8::MAX + 1u8) as usize];
+//~^ ERROR mismatched types
+
+fn main() {
+    foo(&A_I8_I[..]);
+}
+
+fn foo<T:fmt::Debug>(x: T) {
+    println!("{:?}", x);
+}
+