Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 35 insertions, 0 deletions

diff --git a/tests/ui/cleanup-rvalue-scopes-cf.rs b/tests/ui/cleanup-rvalue-scopes-cf.rs
new file mode 100644
index 000000000..e3cecb1bf
--- /dev/null
+++ b/tests/ui/cleanup-rvalue-scopes-cf.rs
@@ -0,0 +1,35 @@
+// Test that the borrow checker prevents pointers to temporaries
+// with statement lifetimes from escaping.
+
+use std::ops::Drop;
+
+static mut FLAGS: u64 = 0;
+
+struct StackBox<T> { f: T }
+struct AddFlags { bits: u64 }
+
+fn AddFlags(bits: u64) -> AddFlags {
+    AddFlags { bits: bits }
+}
+
+fn arg(x: &AddFlags) -> &AddFlags {
+    x
+}
+
+impl AddFlags {
+    fn get(&self) -> &AddFlags {
+        self
+    }
+}
+
+pub fn main() {
+    let x1 = arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
+    let x2 = AddFlags(1).get(); //~ ERROR temporary value dropped while borrowed
+    let x3 = &*arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
+    let ref x4 = *arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
+    let &ref x5 = arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
+    let x6 = AddFlags(1).get(); //~ ERROR temporary value dropped while borrowed
+    let StackBox { f: x7 } = StackBox { f: AddFlags(1).get() };
+    //~^ ERROR temporary value dropped while borrowed
+    (x1, x2, x3, x4, x5, x6, x7);
+}