Merged migrated compile-fail tests and ui tests. Fixes #46841.

1 files changed, 27 insertions, 0 deletions

diff --git a/src/test/ui/borrowck/two-phase-sneaky.rs b/src/test/ui/borrowck/two-phase-sneaky.rs
new file mode 100644
index 00000000000..eec4b470d75
--- /dev/null
+++ b/src/test/ui/borrowck/two-phase-sneaky.rs
@@ -0,0 +1,27 @@
+// Copyright 2017 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.
+
+// cmpile-flags: -Z borrowck=mir -Z two-phase-borrows
+
+// This is the first counter-example from Niko's blog post
+// smallcultfollowing.com/babysteps/blog/2017/03/01/nested-method-calls-via-two-phase-borrowing/
+// of a danger for code to crash if we just turned off the check for whether
+// a mutable-borrow aliases another borrow.
+
+fn main() {
+    let mut v: Vec<String> = vec![format!("Hello, ")];
+    v[0].push_str({
+
+        v.push(format!("foo"));
+        //~^   ERROR cannot borrow `v` as mutable more than once at a time [E0499]
+
+        "World!"
+    });
+}