1 files changed, 39 insertions, 0 deletions
diff --git a/tests/ui/borrowck/borrowck-lend-flow.rs b/tests/ui/borrowck/borrowck-lend-flow.rs
new file mode 100644
index 000000000..564c57044
--- /dev/null
+++ b/tests/ui/borrowck/borrowck-lend-flow.rs
@@ -0,0 +1,39 @@
+// Note: the borrowck analysis is currently flow-insensitive.
+// Therefore, some of these errors are marked as spurious and could be
+// corrected by a simple change to the analysis.  The others are
+// either genuine or would require more advanced changes.  The latter
+// cases are noted.
+
+
+
+fn borrow(_v: &isize) {}
+fn borrow_mut(_v: &mut isize) {}
+fn cond() -> bool { panic!() }
+fn for_func<F>(_f: F) where F: FnOnce() -> bool { panic!() }
+fn produce<T>() -> T { panic!(); }
+
+fn inc(v: &mut Box<isize>) {
+    *v = Box::new(**v + 1);
+}
+
+fn pre_freeze() {
+    // In this instance, the freeze starts before the mut borrow.
+
+    let mut v: Box<_> = Box::new(3);
+    let _w = &v;
+    borrow_mut(&mut *v); //~ ERROR cannot borrow
+    _w.use_ref();
+}
+
+fn post_freeze() {
+    // In this instance, the const alias starts after the borrow.
+
+    let mut v: Box<_> = Box::new(3);
+    borrow_mut(&mut *v);
+    let _w = &v;
+}
+
+fn main() {}
+
+trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { }  }
+impl<T> Fake for T { }