two-phase borrows: support multiple activations in one statement

The need for this has arisen since the introduction of two-phase borrows on
method autorefs.

Fixes 49635
Fixes 49662

1 files changed, 35 insertions, 0 deletions

diff --git a/src/test/ui/borrowck/two-phase-multiple-activations.rs b/src/test/ui/borrowck/two-phase-multiple-activations.rs
new file mode 100644
index 00000000000..e1ed41bfb2c
--- /dev/null
+++ b/src/test/ui/borrowck/two-phase-multiple-activations.rs
@@ -0,0 +1,35 @@
+// 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.
+
+// revisions: lxl nll
+//[lxl]compile-flags: -Z borrowck=mir -Z two-phase-borrows
+//[nll]compile-flags: -Z borrowck=mir -Z two-phase-borrows -Z nll
+
+// run-pass
+
+use std::io::Result;
+
+struct Foo {}
+
+pub trait FakeRead {
+    fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize>;
+}
+
+impl FakeRead for Foo {
+    fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize> {
+        Ok(4)
+    }
+}
+
+fn main() {
+    let mut a = Foo {};
+    let mut v = Vec::new();
+    a.read_to_end(&mut v);
+}