1 files changed, 18 insertions, 0 deletions
diff --git a/src/test/ui/nll/match-cfg-fake-edges2.rs b/src/test/ui/nll/match-cfg-fake-edges2.rs
new file mode 100644
index 000000000..48f95e03b
--- /dev/null
+++ b/src/test/ui/nll/match-cfg-fake-edges2.rs
@@ -0,0 +1,18 @@
+// Test that we have enough false edges to avoid exposing the exact matching
+// algorithm in borrow checking.
+
+fn all_previous_tests_may_be_done(y: &mut (bool, bool)) {
+    let r = &mut y.1;
+    // We don't actually test y.1 to select the second arm, but we don't want
+    // borrowck results to be based on the order we match patterns.
+    match y { //~ ERROR cannot use `y.1` because it was mutably borrowed
+        (false, true) => 1,
+        (true, _) => {
+            r;
+            2
+        }
+        (false, _) => 3,
+    };
+}
+
+fn main() {}