Merge pull request #1447 from alexheretic/2018-borrow-error

Rebrake borrow error test

Author: Xanewok

tests/fixtures/borrow_error/Cargo.toml

@@ -2,5 +2,6 @@
 name = "borrow_error"
 version = "0.1.0"
 authors = ["Jonathan Turner <jturner@mozilla.com>"]
+edition = "2018"
 
 [dependencies]

tests/fixtures/borrow_error/src/main.rs

@@ -2,4 +2,5 @@ fn main() {
     let mut x = 3;
     let y = &mut x;
     let z = &mut x;
+    *y += 1;
 }